WHAT IS CLAIMED IS: 1. A compound of Formula II: wherein R3 is -C(=O)-N(R4)2, and wherein R4 is independently selected at each occurrence from C3-C5 alkyl. 2. The compound of claim 1, wherein each R4 is isopropyl. 3. The compound of claim 1 or claim 2, wherein the compound is selected from 4. A compound of Formula II-a 5. A compound of Formula II-b 6. A process for synthesis of a compound of Formula I the process comprising: reacting a compound of Formula II with a compound of Formula III (III) to form the compound of Formula I; wherein: R1 is selected from C1-C6 alkyl, C1-C6 haloalkyl, C2-C6 alkenyl, C2-C6 alkynyl, (C3- C6 cycloalkyl)(C0-C3 alkyl)-, (3- to 8-membered monocyclic or bicyclic heterocycle)-(C0-C3 alkyl)-, (6- to 10-membered monocyclic or bicyclic aryl)-(C0-C3alkyl)-, and (5- to 10- membered monocyclic or bicyclic heteroaryl)-(C0-C3 alkyl)-, wherein each R1 is optionally substituted with one or more Z groups as allowed by valency; R3 is -C(=O)-N(R4)2, wherein R4 is independently selected at each occurrence from C3-C5 alkyl; Z is independently selected at each occurrence from halo, cyano, azido, C1-C6 alkyl, C1-C6 haloalkyl, C2-C6 alkenyl, C2-C6 alkynyl, (C3-C6 cycloalkyl)(C0-C3 alkyl)-, (3- to 8- membered monocyclic or bicyclic heterocycle)-(C0-C3 alkyl)-, (6- to 10-membered monocyclic or bicyclic aryl)-(C0-C3alkyl)-, (5- to 10-membered monocyclic or bicyclic heteroaryl)-(C0-C3 alkyl)-, RxO-(C0-C3 alkyl)-, RxS-(C0-C3 alkyl)-, (RxRyN)-(C0-C3 alkyl)-, RxO-C(O)-(C0-C3 alkyl)-, RxS-C(O)-(C0-C3 alkyl)-, (RxRyN) C(O)-(C0-C3 alkyl)-, RxO- S(O)2-(C0-C3 alkyl)-, (RxRyN) S(O)2-(C0-C3 alkyl)-, RzC(O)-O-(C0-C3 alkyl)-, RzC(O)- (RxN)-(C0-C3 alkyl)-, RzS(O)2-O-(C0-C3 alkyl)-, RzS(O)2-(RxN)-(C0-C3 alkyl)-, RzC(O)-(C0- C6 alkyl)-, RzS(O)-(C0-C3 alkyl)-, and RzS(O)2-(C0-C3 alkyl)-, wherein each Z is optionally substituted with one or more Y groups as allowed by valency; Rx and Ry are independently selected at each occurrence from hydrogen, C1-C6alkyl, C1-C6haloalkyl, C2-C6alkenyl, C2-C6alkynyl, (C3-C7cycloalkyl)-(C0-C3 alkyl)-, (4- to 6- membered heterocycle)-(C0-C3 alkyl)-, (5- to 10-membered monocyclic or bicyclic aryl)- (C0-C3 alkyl)-, (5- to 10-membered monocyclic or bicyclic heteroaryl)-(C0-C3 alkyl)-, each of which is optionally substituted with one or more Y groups as allowed by valency; Rz is independently selected at each occurrence from hydrogen, halo, C1-C6alkyl, C1-C6haloalkyl, C2-C6alkenyl, C2-C6alkynyl, (C3-C7cycloalkyl)-(C0-C3 alkyl)-, (4- to 6- membered heterocycle)-(C0-C3 alkyl)-, (5- to 10-membered monocyclic or bicyclic aryl)- (C0-C3 alkyl)-, (5- to 10-membered monocyclic or bicyclic heteroaryl)-(C0-C3 alkyl)-, -ORx, -SRx, and -NRxRy, each of which is optionally substituted with one or more Y groups as allowed by valency; and Y is independently selected at each occurrence from alkyl, haloalkyl, alkoxy, alkenyl, alkynyl, aryl, heteroaryl, cycloalkyl, heterocycle, aldehyde, amino, carboxylic acid, ester, ether, halo, hydroxy, keto, nitro, cyano, azido, oxo, silyl, sulfo-oxo, sulfonyl, sulfone, sulfoxide, sulfonylamino, or thiol. 7. The process of claim 6, wherein each R4 is independently selected from isopropyl, sec-butyl, tert-butyl, and isopentyl. 8. The process of claim 6 or claim 7, wherein each R4 is isopropyl. 9. The process of any one of claims 6-8, wherein the compound of Formula II is selected from: 10. The process of any one of claims 6-9, wherein the process is performed in the presence of a solvent. 11. The process of claim 10, wherein the solvent comprises an ethereal solvent. 12. The process of claim 10 or claim 11, wherein the solvent comprises diethyl ether, tetrahydrofuran, 1,4-dioxane, cyclopentyl methyl ether, or combinations thereof. 13. The process of any one of claims 6-12, wherein the process is performed at a temperature from about -80 degrees Celsius to about -40 degrees Celsius. 14. A compound of Formula I prepared according to the process of any one of claims 6- 13. 15. A process for synthesis of a compound of Formula V (V), the process comprising: (a) preparing a compound of Formula I according to the process of any one of claims 6-13; (b) reacting the compound of Formula I with a first base to form a compound of Formula IV (IV); and (c) reacting the compound of Formula IV with a fluorinating reagent and a second base to form the compound of Formula V wherein all variables are as defined in claim 6. 16. The process of claim 15, wherein the first base comprises a metal alkoxide. 17. The process of claim 15 or 16, wherein the first base comprises a metal tert- butoxide, such as sodium or potassium tert-butoxide. 18. The process of any one of claims 15-17, wherein step (b) is performed in the presence of a solvent. 19. The process of claim 18, wherein the solvent comprises an ethereal solvent. 20. The process of claim 18 or 19, wherein the solvent comprises diethyl ether, tetrahydrofuran, 1,4-dioxane, cyclopentyl methyl ether, or combinations thereof. 21. The process of any one of claims 15-20, wherein step (b) is performed at a temperature from about 25 degrees Celsius to about 100 degrees Celsius. 22. The process of any one of claims 15-21, wherein the fluorinating agent comprises an electrophilic fluorinating agent. 23. The process of any one of claims 15-22, wherein the fluorinating agent comprises N- fluorobenzenesulfonimide. 24. The process of any one of claims 15-23, wherein the second base comprises a metal hydride. 25. The process of any one of claims 15-24, wherein the second base comprises sodium hydride, potassium hydride, or cesium hydride. 26. The process of any one of claims 15-25, wherein step (c) is performed in the presence of a solvent. 27. The process of claim 26, wherein the solvent comprises an ethereal solvent. 28. The process of claim 26 or 27, wherein the solvent comprises diethyl ether, tetrahydrofuran, 1,4-dioxane, cyclopentyl methyl ether, or combinations thereof. 29. The process of any one of claims 15-28, wherein step (c) is performed at a temperature ranging from about -40 degrees Celsius to about 30 degrees Celsius. 30. A process for synthesis of a compound of Formula V the process comprising: (a) preparing a compound of Formula I according to the process of any one of claims 6-13; (b) reacting the compound of Formula I with a first base to form a reaction mixture; (c) reacting the first reaction mixture with a fluorinating reagent in the presence of an acid to form the compound of Formula V wherein all variables are as defined in claim 6. 31. The process of claim 30, wherein the first base comprises a metal alkoxide. 32. The process of claim 30 or 31, wherein the first base comprises a metal tert- butoxide, such as sodium or potassium tert-butoxide. 33. The process of any one of claims 30-32, wherein step (b) is performed at a temperature from about 25 degrees Celsius to about 100 degrees Celsius. 34. The process of any one of claims 30-33, wherein step (b) is performed in the presence of a solvent. 35. The process of claim 34, wherein the solvent comprises an ethereal solvent. 36. The process of claim 34 or 35, wherein the solvent comprises diethyl ether, tetrahydrofuran, 1,4-dioxane, cyclopentyl methyl ether, or combinations thereof. 37. The process of any one of claims 30-36, wherein the reaction mixture formed in step (b) is not isolated or purified before performing step (c). 38. The process of any one of claims 30-37, wherein the fluorinating agent comprises an electrophilic fluorinating agent. 39. The process of any one of claims 30-38, wherein the fluorinating agent comprises N- fluorobenzenesulfonimide. 40. The process of any one of claims 30-39, wherein the acid comprises an organic acid. 41. The process of any one of claims 30-40, wherein the acid comprises acetic acid. 42. The process of any one of claims 30-41, wherein step (c) is performed at a temperature ranging from about -40 degrees Celsius to about 30 degrees Celsius. 43. A compound of Formula V prepared according to the process of any one of claims 15-42. 44. A process for synthesis of a compound of Formula VII (VII), the process comprising: (a) preparing a compound of Formula V according to the process of any one of claims 15-42; (b) reacting the compound of Formula V with a compound of Formula VI (VI) to form the compound of Formula VII; wherein: R5 is selected from C1-C6 alkyl, C1-C6 haloalkyl, C2-C6 alkenyl, C2-C6 alkynyl, (C3- C6 cycloalkyl)(C0-C3 alkyl)-, (3- to 8-membered monocyclic or bicyclic heterocycle)-(C0-C3 alkyl)-, (6- to 10-membered monocyclic or bicyclic aryl)-(C0-C3alkyl)-, (5- to 10-membered monocyclic or bicyclic heteroaryl)-(C0-C3 alkyl)-, RxO-(C0-C3 alkyl)-, and (RxRyN)-(C0-C3 alkyl)-, wherein each R5 is optionally substituted with one or more Z groups as allowed by valency; M is selected from Li, Na, MgX1, and MgX1LiX2, wherein X1 and X2 are each independently halo; and all other variables are as defined in claim 6. 45. The process of claim 44, wherein M is Li. 46. The process of claim 44, wherein M is Na. 47. The process of claim 44, wherein M is MgCl or MgBr. 48. The process of claim 44, wherein M is MgBrLiCl or MgClLiCl. 49. The process of any one of claims 44-48, wherein step (b) is performed in the presence of a solvent. 50. The process of claim 49, wherein the solvent comprises an ethereal solvent. 51. The process of claim 49 or 50, wherein the solvent comprises diethyl ether, tetrahydrofuran, 1,4-dioxane, cyclopentyl methyl ether, or combinations thereof. 52. The process of any one of claims 35-62, wherein step (b) is performed at a temperature ranging from about -10 degrees Celsius to about 30 degrees Celsius. 53. A process for synthesis of a compound of Formula VII-a the process comprising: (a) preparing a compound of Formula V according to the process of any one of claims 15-42; (b) reacting the compound of Formula V with a compound of Formula VI-a in the presence of an amine base to form the compound of Formula VII; wherein: R5a is selected from C1-C6 alkyl, C1-C6 haloalkyl, C2-C6 alkenyl, C2-C6 alkynyl, (C3- C6 cycloalkyl)(C0-C3 alkyl)-, (3- to 8-membered monocyclic or bicyclic heterocycle)-(C0-C3 alkyl)-, (6- to 10-membered monocyclic or bicyclic aryl)-(C0-C3alkyl)-, or (5- to 10- membered monocyclic or bicyclic heteroaryl)-(C0-C3 alkyl)-, wherein R5a is optionally substituted with one or more Z groups as allowed by valency; R5b is selected from hydrogen, C1-C6 alkyl, C1-C6 haloalkyl, C2-C6 alkenyl, C2-C6 alkynyl, (C3-C6 cycloalkyl)(C0-C3 alkyl)-, (3- to 8-membered monocyclic or bicyclic heterocycle)-(C0-C3 alkyl)-, (6- to 10-membered monocyclic or bicyclic aryl)-(C0-C3alkyl)-, or (5- to 10-membered monocyclic or bicyclic heteroaryl)-(C0-C3 alkyl)-, wherein R5b is optionally substituted with one or more Z groups as allowed by valency; or R5a and R5b are brought together with the nitrogen to which they are attached to form a 3- to 8-membered monocyclic or bicyclic heterocycle which is optionally substituted with one or more Z groups as allowed by valency; and all other variables are as defined in claim 6. 54. The process of claim 53, wherein the amine base is selected from pyridine, 2,6- lutidine, collidine, triethylamine, tributylamine, and quinuclidine. 55. The process of claim 53 or claim 54, wherein step (b) is performed in the presence of a lithium salt, such as lithium chloride or lithium bromide. 56. The process of any one of claims 53-55, wherein step (b) is performed in the presence of a solvent. 57. The process of claim 56, wherein the solvent comprises acetonitrile. 58. The process of any one of claims 53-57, wherein step (b) is performed at a temperature ranging from about 25 degrees Celsius to about 100 degrees Celsius. 59. A compound of Formula VII prepared by the process of any one of claims 44-52. 60. A compound of Formula VII-a prepared by the process of any one of claims 53-58. 61. A process of synthesis of a compound of Formula VIII (VIII) the process comprising: (a) preparing a compound of Formula VII according to the process of any one of claims 44-52; and (b) reacting the compound of Formula VIII in the presence of an acid or by heating to form the compound of Formula VIII; wherein all variables are as defined in claim 44. 62. A process of synthesis of a compound of Formula VIII-a (VIII-a) (a) preparing a compound of Formula VII according to the process of any one of claims 53-58; and (b) reacting the compound of Formula VIII in the presence of an acid or by heating to form the compound of Formula VIII; wherein all variables are as defined in claim 53. 63. The process of claim 61 or claim 62, wherein the acid comprises camphor sulfonic acid. 64. The process of any one of claims 61-63, wherein step (b) is performed in the presence of a solvent. 65. The process of claim 64, wherein the solvent comprises hexafluoroisopropanol. 66. The process of claim 64, wherein the solvent comprises a mixture of dimethyl sulfoxide and water. 67. A compound of Formula VIII or Formula VIII-a prepared by the process of any one of claims 61-66. |
Table 1: All reactions were performed on a 0.3 mmol scale and t-BuSF added to PhLi (1.9 M in dibutyl ether) at -78 ºC. Reactions were quenched within 1 hour after addition unless otherwise stated. Enantiopurity was determined by chiral HPLC. a Isolated yield. b Not available. c No observable difference in yield or % ee when forming PhLi in situ using GP-1 or GP-2. d 1,2-dimethoxyethane (DME) was warmed to -50 ℃ due to its melting point. e t- BuSF (93.5% ee) prepared using Selectfluor instead of NFSI. Addition rates (entries 23-33) were controlled via syringe pump. General procedures for the Synthesis of chiral N,N-diisopropyl urea protected tert-butyl sulfoximines. General procedure 1 (GP-1): Stepwise addition of reagents. To a 10 mL flame dried round-bottomed flask equipped with magnetic stir bar and argon balloon was added aryl bromide (0.375 mmol, 1.5 eq.) and anhydrous Et 2 O (2.0 mL). Cooled to -78 ºC and n-BuLi (0.150 mL, 2.5 M in hexane, 1.5 eq.) was added dropwise. Stirred for 1 hour (lithium-halogen exchange) then tert-butyl sulfonimidoyl fluoride (66.5 mg, 0.25 mmol, 1 eq.) in Et2O (0.5 mL) was added dropwise. The reaction mixture stirred at -78 ºC for 1 hour (unless otherwise stated—vide infra). Upon completion (checked by TLC and LC–MS) MeOH (0.2 mL) and saturated aqueous NH4Cl (5 mL) were added to quench the reaction. The mixture was transferred to separatory funnel and extracted with EtOAc (5 ml x 3), then washed with water (10 mL x 3) and brine (10 mL x 3). Dried over anhydrous Na 2 SO 4 , filtered and concentrated under reduced pressure. Further purification was performed by silica gel column chromatography to give the desired tert-butyl sulfoximines. General procedure 2 (GP-2): Lithiation of aryl halides in the presence of t-BuSF. To a 10 mL flame dried round-bottomed flask equipped with magnetic stir bar and argon balloon was added aryl bromide (0.375 mmol, 1.5 eq.), t-Bu sulfonimidoyl fluoride (66.5 mg, 0.25 mmol, 1 eq.) and anhydrous Et2O (2.5 mL). Cooled to -78 ºC and t-BuLi (0.22 mL, 1.7 M in pentane, 1.5 eq.) was added dropwise. The reaction mixture was stirred at -78 ºC for 1 hour (some substrates required longer Li–X exchange times; vide infra). Upon completion (checked by TLC and LC–MS) MeOH (0.2 mL) and saturated aqueous NH 4 Cl (5 mL) were added to quench the reaction. The mixture was transferred to separatory funnel and extracted with EtOAc (5 ml x 3), then washed with water (10 mL x 3) and brine (10 mL x 3). Dried over anhydrous Na 2 SO 4 , filtered and concentrated under reduced pressure. Further purification was performed by silica gel column chromatography to give the desired tert-butyl sulfoximines. General procedure 3 (GP-3): Lithium–halogen exchange of (hetero)aryl halides and substrates less prone to lithiation. To a flame dried round-bottomed flask equipped with magnetic stir bar under argon was added (hetero)aryl halide (0.375 mmol,1.5 eq.) and Et2O (2.0 mL) then cooled to -78 °C. n-BuLi (0.150 mL, 0.375 mmol, 2.5 M in hexane, 1.5 eq.) was added dropwise and stirred at -78 °C for 30 minutes then warmed to -20–0 °C gradually and stirred for another 30 minutes then cooled to -78 °C. A solution of t-BuSF (0.25 mmol, 1 eq.) in Et 2 O (0.5 mL) was added dropwise. The reaction mixture was stirred at -78 ºC for 1 hour (or warmed to the temperature noted below). Upon completion (checked by TLC and LC–MS) MeOH (0.2 mL) and saturated aqueous NH4Cl (5 mL) were added to quench the reaction. The mixture was transferred to separatory funnel and extracted with EtOAc (5 ml x 3), then washed with water (10 mL x 3) and brine (10 mL x 3). Dried over anhydrous Na 2 SO 4 , filtered and concentrated under reduced pressure. Further purification was performed by silica gel column chromatography to give the desired tert-butyl sulfoximines. Activating urea protected tert-butyl sulfoximines for further functionalization. Optimization for the reductive de-tert-butylation of N,N-diisopropyl urea protected chiral tert-butyl sulfoximines to sulfinyl ureas. Table 2: All reactions were performed on a 0.3 mmol scale in a flame dried flask under argon with anhydrous solvents. Enantiopurity was determined by using chiral HPLC. Reactions were quenched with wet (THF/DCM) silica gel. a Isolated yield. b Decomposed upon heating. c Relative yield based on LC–MS. General procedure 4 (GP-4): reductive de-tert-butylation of N,N-diisopropyl urea protected chiral tert-butyl sulfoximines to sulfinyl ureas using t-BuOK. In a septum capped flame dried round-bottomed flask equipped with a stir bar and argon balloon was added tert-butyl sulfoximine (1 eq.) followed by THF (0.3 M). Solid t- BuOK (3 eq.) was added, and the reaction stirred at room temperature for 2-5 minutes. The argon balloon was removed, and the reaction placed in a pre-heated oil bath set to 80 ºC for 2 hours (behind a blast shield). Upon competition (checked by TLC) the reaction was cooled to -20 ºC then quenched by adding a solution of AcOH (2 eq.) in THF (1-2 M) followed by silica gel (10:1, silica gel to starting material by mass) or by adding wet (THF and DCM) silica gel (20:1, silica gel to starting material by mass) with continual stirring at - 20 ºC for 2-5 minutes. The reaction mixture containing silica was filtered a plug of silica gel (wet with DCM) and rinsed with DCM. The filtrate was concentrated under reduced pressure via rotary evaporated with a water bath set to 25 ºC to give the desired sulfinyl urea in 80-90% yields with high purity. Optimization for the S–fluorination of chiral sulfinyl ureas to N,N-diisopropyl urea protected chiral sulfonimidoyl fluorides. Table 3: All reactions were performed on 0.3 mmol scale in a flame dried flask under argon. Enantiopurity was determined by using chiral HPLC. a Isolated yield. General procedure 5 (GP-5): synthesis of N,N-diisopropyl urea protected chiral sulfonimidoyl fluorides from sulfinyl ureas. In a septum capped flask or reaction vial equipped with a stir bar and argon balloon was added sulfinyl urea (1 eq.) and THF (0.1 M) then cooled to -20 ºC. Either solid t-BuOK (1.1 eq.) or NaH (1.5 eq., 60% wt) was added (in one portion for small scale reactions, portion wise for > 5 mmol scales) and the reaction stirred for 15 minutes at -20 ºC. NFSI (1 eq.) was added in one portion and the reaction continued to stir for 30 minutes at -20 ºC. Upon completion (checked by TLC) the reactions were quenched with saturated aqueous NH 4 Cl and extracted with EtOAc (x 3). Combined organic layers were washed with water and brine, dried over Na2SO4, filtered and concentrated. Further purification by silica gel column chromatography provided the desired sulfonimidoyl fluorides. Optimization of the one-pot transformation of N,N-diisopropyl urea protected chiral tert-butyl sulfoximines to sulfonimidoyl fluorides. Table 4: All reactions were performed on 0.3 mmol scale in a flame dried flask under argon. Enantiopurity was determined by using chiral HPLC. a Isolated yield. b reaction performed on 1.5 mmol scale (500 mg). c reaction performed on > 3 mmol scale (> 1 g). d Not available. e Not detected. General procedure 6 (GP-6): one-pot transformation of N,N-diisopropyl urea protected chiral tert-butyl sulfoximines to sulfonimidoyl fluorides. then AcOH, NFSI t ert-butyl THF, -20 ºC sulfonimidoyl sulfoximine fluoride (>99% ee) (> 99% ee) To a flame dried round bottom flask equipped with magnetic stir bar and argon balloon was added t-Bu sulfoximine (1.0 eq) and anhydrous THF (0.3 M). Once dissolved, solid anhydrous t-BuOK (3.0 eq) was added, and the reaction stirred at room temperature for 2-5 minutes. The argon balloon was removed, and the reaction placed in a pre-heated oil bath set to 80 ºC for 2 hours (behind a blast shield). After 2 h (or upon completion; checked by TLC), the argon balloon was replaced then the reaction was cooled to -20°C with dry ice and acetone bath. AcOH (2.0 eq) dissolved in anhydrous THF was added slowly to dilute the reaction to 0.1 M. Solid NSFI (1.0 eq) was added in one portion, and the reaction stirred at -20°C for 30 mins. Upon completion (checked by TLC) the reaction was quenched with saturated aqueous NH 4 Cl solution at -20 °C and extracted with EtOAc (x 3). Combined organic layers were washed with water (x 3) and brine (x 3), dried over Na2SO4, filtered and concentrated under reduced pressure. Further purification was performed by silica gel column chromatography to provide the desired sulfonimidoyl fluoride. Synthesis of chiral sulfoximines and sulfonimidamides from N,N-diisopropyl urea protected sulfonimidoyl fluorides. General procedure 7 (GP-7): synthesis of N,N-diisopropyl urea protected chiral sulfoximines from sulfonimidoyl fluorides via Grignard reagents. The Grignard reagents were used as purchased or prepared as follows: In a 10 mL flame dried round-bottomed flask equipped a stir bar and argon balloon was added Mg turnings (73 mg, 3 mmol, 1.5 eq.) and I2 (approx.5 mg, 0.02 mmol, 0.01 eq.) then vacuumed and refilled with argon. A portion of alkyl bromide or iodide (2 mmol, 1 eq.) solution in anhydrous THF (4 mL) was added with gentle heat until I2 color disappeared, the rest of solution was then added dropwise. After titration with iodine, the proper amount of the Grignard reagent (0.275 mmol, 1.1 eq.) was added dropwise to a solution of the sulfonimidoyl fluoride (0.25 mmol, 1.0 eq.) in THF (2.5 mL) in a separate 5 mL flame dried septum capped vial equipped a stir bar and argon balloon at 0 ºC. The reaction was stirred at 0 ºC for 30 minutes then warmed to room temperature (unless otherwise stated below). Upon completion (checked by TLC) the reaction was quenched with saturated aqueous NH4Cl (5 mL) then extracted with EtOAc (10 mL x 3). The combined organic layers were washed with water (5 mL x 3) then brine (5 mL x 3), dried over anhydrous MgSO4, filtered and concentrated under reduced pressure. Further purification by silica gel column chromatography provided the desired sulfoximines. General procedure 8 (GP-8): synthesis of N,N-diisopropyl urea protected chiral sulfoximines from sulfonimidoyl fluorides via turbo-Grignard reagents. The preparation of turbo-Grignard reagents was modified from the Knochel methods, with slight variations depending on each substrate. In a 5 mL flame dried vial equipped with a stir bar and argon balloon was added isopropylmagnesium chloride lithium chloride (i-PrMgClLiCl) complex solution (0.21 mL, 0.275 mmol, 1.1 eq., 1.3 M in THF) followed by aryl bromide/iodide (0.275 mmol, 1.1 eq.) dissolved in dry THF (0.2 mL) at indicated temperature and exchange for indicated time (vide infra). Upon complete Mg- halogen exchange, a solution of sulfonimidoyl fluoride (0.25 mmol, 1 eq.) in THF (2.5 mL) was added dropwise at 0 ºC, stirred for 30 minutes then warmed to room temperature. Upon completion (checked by TLC) the reaction was quenched with saturated aqueous NH 4 Cl (5 mL) then extracted with EtOAc (10 mL x 3). The combined organic layers were washed with water (5 mL x 3) then brine (5 mL x 3), dried over anhydrous MgSO4, filtered and concentrated under reduced pressure. Further purification by silica gel column chromatography provided the desired sulfoximines. General Procedure 9 (GP-9): synthesis of N,N-diisopropyl urea protected chiral sulfonimidamides from sulfonimidoyl fluorides using Li/Na/K–HMDS as a base. To a flame dried round bottom flask equipped with magnetic stir bar and argon balloon was sulfonimidoyl fluoride (0.25 mmol, 1.0 eq.) and amine (1.0 eq.) in anhydrous THF (0.1 M) at 0 °C. M-HMDS (2.0 eq.) was added dropwise to the stirring mixture at 0 °C. The reaction slowly warmed to room temperature where it stirred. Upon completion (checked by TLC) the reaction was quenched with silica gel then DCM was added, and solvent removed to adsorb the crude material to silica gel. Purification by column chromatography provided the desired sulfonimidamides. General Procedure 10 (GP-10): synthesis of N,N-diisopropyl urea protected chiral sulfonimidamides from sulfonimidoyl fluorides using turbo-amides. For aliphatic amines: To a flame dried round bottom flask equipped with magnetic stir bar and argon balloon was amine (2 eq. for 1º amines, 1 eq. for 2º amines) in anhydrous THF (0.1 M) at 0 °C. i-PrMgCl-LiCl (2 eq. for 1º amines, 1:1; 1 eq. for 2º amines, 1:1) was added dropwise under 0 °C. After 30 minutes of stirring, sulfonimidoyl fluoride (1.0 eq.) in THF (0.5 M) was added dropwise then warmed to room temperature. Upon completion (checked by TLC) the reaction was quenched with saturated aqueous NH 4 Cl then extracted with EtOAc (x 3). The combined organic layers were washed with water (x 3) then brine (x 3), dried over anhydrous MgSO4, filtered and concentrated under reduced pressure. Further purification by silica gel column chromatography provided the desired sulfonimidamides. For ammonium chloride or bromide: To a flame dried round bottom flask equipped with magnetic stir bar and argon balloon was ammonium chloride or bromide (3.0 eq.) in anhydrous THF (0.1 M) at 0 °C. i-PrMgCl-LiCl (6.0 eq.) was added dropwise to the vigorously stirring mixture at 0 °C (cloudy mixture) then warmed to room temperature where the reaction mixture stirred until it became nearly clear (1 hour). The reaction mixture was cooled to 0 ºC then sulfonimidoyl fluoride (1 eq.) in THF (0. 5 M) was added dropwise and slowly warmed to room temperature. Upon completion (checked by TLC) the reaction was quenched with saturated aqueous NH 4 Cl then extracted with EtOAc (x 3). The combined organic layers were washed with water (x 3) then brine (x 3), dried over anhydrous MgSO 4 , filtered and concentrated under reduced pressure. Further purification by silica gel column chromatography provided the desired sulfonimidamides. General Procedure 11 (GP-11): synthesis of N,N-diisopropyl urea protected chiral sulfonimidamides from sulfonimidoyl fluorides using Et3N under thermal conditions. This reaction condition was adopted from the report by Bull and Luecking and slightly modified. In a flame dried septum capped vial equipped with a stir bar and argon balloon was added sulfonimidoyl fluoride (1 eq.) followed by MeCN (0.3 M). The amine (1-1.5 eq.), LiBr (2 eq.) or NaI (2 eq.), and Et3N (2 eq.) were added. The argon balloon was removed, and the reaction was heated to 60-70 ºC for the indicated reaction time (3-48 hours). Upon completion (checked by TLC and/or LC–MS) the solvent was removed under reduced pressure and the crude material purified by silica gel column chromatography. General procedure 12 (GP-12): rapid synthesis of N,N-diisopropyl urea protected chiral sulfoximines and sulfonimidamides from tert-butyl sulfoximines in one-pot. To a flame dried round-bottomed flask equipped with magnetic stir bar and argon balloon was added tert-butyl sulfoximine (1 eq.) followed by anhydrous THF (0.3 M). Once dissolved, solid anhydrous t-BuOK (3.0 eq) was added, and the reaction stirred at room temperature for 2-5 minutes. The argon balloon was removed, and the reaction placed in a pre-heated oil bath set to 80 ºC for 2 hours (behind a blast shield). After 2 h (or upon completion; checked by TLC), the argon balloon was replaced then the reaction was cooled to -20°C with dry ice and acetone bath. AcOH (2.0 eq) dissolved in anhydrous THF was added slowly to dilute the reaction to 0.1 M. Solid NSFI (1.0 eq) was added in one portion, and the reaction stirred at -20°C for 30 mins. Upon completion (checked by TLC) either the Grignard or amine nucleophile was added. Grignard nucleophiles: The reaction mixture was cooled to -78 ºC then the Grignard reagent (2 eq.) was added dropwise and stirred for one hour at -78 ºC. Upon completion (checked by TLC) the reaction was quenched with saturated aqueous NH 4 Cl solution then extracted with EtOAc (x 3). The combined organic layers were washed with water (x 3) then brine (x 3), dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure. Further purification by silica gel column chromatography provided the desired sulfoximines. Amine nucleophiles: While the reaction was still at -20 ºC from the fluorination step, the amine (1 eq.) and NaHMDS (2 eq.) were sequentially added to the reaction then slowly warmed to room temperature. Upon completion (checked by TLC) the reaction was quenched with silica gel then DCM was added, and solvent removed to adsorb the crude material to silica gel. Purification by column chromatography provided the desired sulfonimidamides. Removal of N,N-diisopropyl urea-type groups from sulfonimidoyl compounds: a new protecting group for sulfoximines and sulfonimidamides. Optimization for the removal of N,N-diisopropyl urea protecting group to give N–H sulfoximines.
Table 5: All reactions were performed on 0.1 mmol scale in a flame dried flask or vial under argon. a Determined by LC-MS. b Isolated yield. c Not available. d This condition works for primary sulfonimidamides. Examples representing the sulfoximine and sulfonimidamide scope for the deprotection of N,N-diisopropyl urea-type sulfonimidoyl protecting group. Enantiopurity was determined by using chiral HPLC. a Yield after deprotection of the sulfonimidoyl and alcohol (OTBS) protecting groups. General procedure 13 (GP-13): deprotection of N,N-diisopropyl urea protected chiral sulfoximines and sulfonimidamides. In a flask or vial equipped with a stir bar was added sulfoximine or sulfonimidamide (1eq.) followed by CSA (2.0 eq) and HFIP (0.1 M). The reaction vessel was tightly capped then heated to 70 °C and stirred overnight (typically 12 h). Upon completion (checked by TLC) the reaction was cooled to room temperature then quenched with saturated aqueous NaHCO3 to adjust the pH to neutral. The mixture was extracted with EtOAc (x 4), washed with brine and purified by column chromatography to give the desired deprotected sulfoximine or sulfonimidamides. General procedure 14 (GP-14): specific deprotection conditions for N,N-diisopropyl urea protected chiral primary sulfonimidamides. In a flask or vial equipped with a stir bar was added the primary sulfonimidamide (1 eq.) followed by DMSO/H2O (10:1, 0.1 M) then heated to 80 °C (typically 8 hours). Upon completion (checked by TLC) the reaction was cooled to room temperature, diluted with water, and extracted with EtOAc (x 4). The combined organic layers were washed with brine, dried over Na2SO4, filtered and concentrated. Further purification by silica gel column chromatography gave the desired deprotected products. Recrystallization of tert-butyl sulfoximines to further enhance enantiopurity. For the cases in which organolithium additions to t-BuSF do not give the desired enantiopurity, recrystallizations can be performed to further enhance the enantiopurity of tert-butyl sulfoximines. We have found that nearly all N,N-diisopropyl urea protected chiral tert-butyl sulfoximines prepared from t-BuSF are solids at room temperature and have the potential to further enhance the enantiopurity if desired. For example: tert-butyl phenyl sulfoximine was used as our model substrate to demonstrate the bifunctional property of the t-BuSF sulfonimidoyl transfer reagents. The addition of PhLi (commercial or in situ generated) to t-BuSF provides tert-butyl phenyl sulfoximine in 98% ee as a white solid which was enhanced to > 99% ee via recrystallization. The general procedure (GP-14) for typical recrystallizations is as follows: Pure tert-butyl sulfoximine was dissolved in a minimum amount of acetone, with the help of ultrasonic bath or heat. Hexanes (three times the volume of acetone used) was slowly added to prevent complete mixing of the two solvents. The mixture was transformed to -20 °C freezer to settle overnight to induce recrystallization. After 12 hours the recrystallized material was collected by filtration and washed with hexanes (x 3) to give 60– 70% recovery yield and > 99% ee after a single recrystallization. This process can be repeated two more times to give up to 90% recovery yield with > 99% ee. Other examples: tert-butyl cyclopropyl sulfoximine (> 90% recovery, 97 to > 99% ee, three crops). tert-butyl 4-chlrophenyl sulfoximine (> 90% recovery, 95 to > 99% ee; three crops). First functionalization of t-BuSF reagent: chiral tert-butyl sulfoximine product characterization data. GP-1 and GP-2 were used with commercially available bromobenzene (0.375 mmol, 1.5 eq.) with no further modifications. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (70 mg, 217 μmol, 87% yield) as a white crystalline solid. There were no significant differences in yield or enantiopurity between the two procedures. Phenyl lithium can be used instead of generating phenyl lithium from n-BuLi or t-BuLi with no decrease in yield or enantiopurity. Different scale reactions: GP-1 was followed with commercial PhLi (5.33 mL, 10.1 mmol, 1.9 M, dibutylether, 1.5 eq.) and t-BuSF (1.80 g, 6.76 mmol, 1 eq.), produced (1.77 g, 5.45 mmol, 81% yield, 98% ee). GP-1 was followed with commercial PhLi (8.89 mL, 16.9 mmol, 1.9 M, dibutylether, 1.5 eq.) and t-BuSF (3.0 g, 16.9 mmol, 1 eq.), produced (3.30 g, 10.2 mmol, 90% yield, 98% ee). Physical characteristics: White crystalline solid. TLC: R f = 0.27 (hexane/EtOAc, 50% EtOAc, UV). 1 H NMR: (500 MHz, CDCl3) δ 7.84 – 7.73 (m, 2H), 7.61 – 7.56 (m, 1H), 7.55 – 7.50 (m, 2H), 4.06 (s, 2H), 1.37 (s, 9H), 1.27 (d, J = 8.3 Hz, 12H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 159.55, 135.23, 132.89, 130.21, 128.92, 60.78, 45.96, 23.75, 21.39 ppm. Specific rotation: [α] = +28.85 (c 0.50, CHCl3) HRMS: Calc’d for C17H29N2O2S [M+H + ] 325.1944; found 325.1951. Melting Point: 177-178 °C Enantiomeric excess: 98% ee. Recrystallized to > 99% ee with > 90% recovery. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 17.127 min, minor: 26.107 min. GP-1 was followed with no additional modifications: Commercially available 1- bromo-4-fluorobenzene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (71 mg, 207 μmol, 83% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.4 (hexane/EtOAc, 30% EtOAc, UV). 1 H NMR: (500 MHz, CDCl3) δ 7.84 – 7.72 (m, 2H), 7.21 (dd, J = 9.1, 8.2 Hz, 2H), 4.05 (s, 2H), 1.37 (s, 9H), 1.34 – 1.18 (m, 12H) ppm. 13 C NMR: 126 MHz, CDCl 3 ) δ 165.62 (d, J = 254.8 Hz), 159.38, 132.74 (d, J = 9.4 Hz), 131.06 (d, J = 3.2 Hz), 116.32 (d, J = 22.6 Hz), 60.92, 45.97, 23.71, 21.36 ppm. 19 F NMR: (471 MHz, CDCl3) δ -105.86 ppm. Specific rotation: = -15.24 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 17 H 27 FN 2 NaO 2 S [M+Na + ] 365.1669; found 365.1666. Enantiomeric excess: 97% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 13.733 min, major: 17.120 min. GP-1 was followed with no additional modifications: Commercially available 1- bromo-4-chlorobenzene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (75 mg, 208 μmol, 85% yield) as a white crystalline solid. GP-2 was also followed and showed no significant difference on yield or enantiopurity. Physical characteristics: White crystalline solid. TLC: R f = 0.39 (hexane/EtOAc, 30% EtOAc, UV). 1 H NMR: (500 MHz, CDCl3) δ 7.70 (d, J = 8.6 Hz, 2H), 7.50 (d, J = 8.8 Hz, 2H), 4.06 (d, 2H), 1.37 (s, 21H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.38, 139.71, 133.96, 131.55, 129.33, 60.92, 46.47, 45.37, 23.72, 21.88, 20.85 ppm. Specific rotation: = -5.53 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 17 H 28 ClN 2 O 2 S [M+H + ] 359.1555; found 359.1560. Melting Point: 178-180 °C Enantiomeric excess: 95% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 15.767 min, minor: 18.047 min. GP-1 was followed with no additional modifications: Commercially available 4- bromotoluene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (71 mg, 209 μmol, 84% yield) as a white amorphous solid. GP-2 was also followed and showed no significant difference on yield or enantiopurity. Physical characteristics: White amorphous solid. TLC: R f = 0.27 (hexane/EtOAc, 33% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.67 (d, 2H), 7.33 (d, 2H), 4.12 (d, J = 31.4 Hz, 2H), 2.44 (s, 3H), 1.39 (s, 15H), 1.20 (d, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.66, 143.65, 132.06, 130.21, 129.68, 60.67, 46.40, 45.17, 23.74, 21.86, 21.66, 20.88 ppm. Specific rotation: = -9.12 (c 1.00, CHCl3) HRMS: Calc’d for C18H31N2O2S [M+H + ] 339.2101; found 339.2101. Enantiomeric excess: 97% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 27.513 min, minor: 36.560 min. GP-1 was followed with no additional modifications: Commercially available 1- bromo-4-(trifluoromethyl)benzene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (71.6 mg, 183 μmol, 73% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.27 (hexane/EtOAc, 25% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.91 (d, 2H), 7.79 (d, 2H), 4.08 (d, 2H), 1.39 (s, 9H), 1.36 (s, 6H), 1.16 (dd, J = 23.0, 6.7 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 159.31, 139.61, 134.59 (q, J = 32.8 Hz), 130.69, 126.04 (q, J = 3.7 Hz), 123.50 (q, J = 273.0 Hz), 61.03, 46.56, 45.49, 24.73, 23.74, 21.84, 20.90, 20.79 ppm. 19 F NMR: (471 MHz, CDCl3) δ -63.07 ppm. Specific rotation: = -8.76 (c 1.00, CHCl3) HRMS: Calc’d for C18H28F3N2O2S [M+H + ] 393.1818; found 393.1824. Enantiomeric excess: 95% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 8.340 min, minor: 9.387 min. GP-1 was followed with no additional modifications: Commercially available 4- bromoanisole (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (72.6 mg, 206 μmol, 82% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.25 (hexane/EtOAc, 33% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.69 (d, J = 8.8 Hz, 2H), 6.99 (d, J = 9.1 Hz, 2H), 4.30 – 3.90 (m, 2H), 3.86 (s, 3H), 1.42 – 1.08 (m, 21H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 163.29, 159.63, 132.14, 126.22, 114.36, 60.82, 55.70, 45.24, 23.74, 21.83, 21.13 ppm. Specific rotation: = -1.51 (c 1.00, CHCl3) HRMS: Calc’d for C18H31N2O3S [M+H + ] 355.2050; found 355.2051. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 40.207 min, minor: 46.987 min. GP-1 was followed with no additional modifications: Commercially available 4- bromothioanisole (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (69 mg, 187 μmol, 75% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.19 (hexane/EtOAc, 33% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.64 (d, J = 8.6 Hz, 2H), 7.31 (d, J = 8.8 Hz, 2H), 4.06 (s, 2H), 2.51 (s, 3H), 1.37 (s, 9H), 1.25 (t, J = 8.0 Hz, 12H) ppm. 13 C NMR: 13C NMR (126 MHz, CDCl3) δ 159.54, 146.02, 130.75, 130.40, 125.43, 60.91, 46.01, 23.72, 21.33, 14.92 ppm. Specific rotation: +10.10 (c 1.00, CHCl3) HRMS: Calc’d for C 18 H 31 N 2 O 2 S 2 [M+H + ] 371.1821; found 371.1823. Enantiomeric excess: 98% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 40.480 min, minor: 45.533 min. GP-1 was followed with no additional modifications: Commercially available 1- (benzyloxy)-4-bromobenzene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (43 mg, 102 μmol, 40% yield) as a white amorphous solid. Physical characteristics: White amorphous TLC: R f = 0.25 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.69 (d, J = 8.5 Hz, 2H), 7.44 – 7.32 (m, 5H), 7.10 – 7.03 (m, 2H), 5.13 – 5.05 (m, 2H), 4.07 (d, J = 44.0 Hz, 2H), 1.42 – 1.27 (m, 15H), 1.25 – 1.09 (m, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 162.55, 159.64, 136.14, 132.19, 128.87, 128.48, 127.76, 126.51, 115.14, 70.54, 60.84, 45.45, 23.75, 21.95, 20.86 ppm. Specific rotation: = +47.35 (c 0.50, CHCl3) HRMS: Calc’d for C24H35N2O3S [M+H + ] 431.2363; found 431.2359. Enantiomeric excess: 97% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 36.433 min, minor: 52.920 min. GP-1 was followed with no additional modifications: Commercially available 4- bromophenol (or with -TBS protection) were used. Purified by silica gel column chromatography using DCM/MeOH (0% to 10% MeOH gradient) to give the product (63.9 mg, 188 μmol, 75% yield) as a white amorphous solid. Note: The OTBS protected phenol gave similar yield and exact enantiopurity. The silyl protecting group is removed during the reaction. Physical characteristics: White amorphous solid. TLC: Rf = 0.20 (DCM/MeOH, 10% MeOH). 1 H NMR: (500 MHz, CDCl 3 ) δ 9.54 (s, 1H), 7.36 (d, J = 8.3 Hz, 2H), 6.66 – 6.59 (m, 2H), 4.12 (d, J = 121.9 Hz, 2H), 1.42 (d, J = 6.8 Hz, 6H), 1.33 (s, 9H), 1.21 (dd, J = 14.0, 6.8 Hz, 6H) ppm. 13 C NMR: 13C NMR (126 MHz, CDCl3) δ 162.28, 161.13, 131.79, 122.22, 116.53, 61.15, 46.16, 45.95, 23.55, 21.87, 21.72, 20.99, 20.87 ppm. Specific rotation: [α] = -66.29 (c 1.00, CHCl3) HRMS: Calc’d for C17H28N2NaO3S [M+Na + ] 363.1713; found 363.1705. Enantiomeric excess: 97% ee. HPLC Conditions: (hydroxy group was methylated for HPLC analysis) Daicel Chiralpak IC column, 70:30 n-hexane:i- PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 36.540 min, minor: 43.720 min. GP-1 was followed with additional modifications mentioned: Commercially available tert-butyl (4-bromophenyl) carbamate (0.375 mmol, 1.5 eq.) was used and equivalents of n-BuLi was increased (from 1.5 to 3 eq.). Purified by silica gel column chromatography using hexane/Acetone (0% to 30% Acetone gradient) to give the product (65.9 mg, 150 μmol, 60% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.35 (hexane/Acetone, 30% Acetone). 1 H NMR: (500 MHz, CDCl3) δ 7.64 (d, 2H), 7.50 (d, 2H), 6.95 (s, 1H), 4.02 (d, 2H), 1.52 (s, 9H), 1.35 (s, 15H), 1.19 (d, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.61, 152.43, 143.05, 131.37, 127.94, 118.11, 81.40, 60.88, 46.57, 45.31, 28.40, 23.71, 21.82, 21.01 ppm. Specific rotation: = -15.31 (c 1.00, CHCl3) HRMS: Calc’d for C22H38N3O4S [M+H + ] 440.2578; found 440.2574. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 9.673 min, minor: 13.367 min. GP-1 was followed with no additional modifications: Commercially available tert- butyl (4-bromo-3-methylphenyl) carbamate (0.375 mmol, 1.5 eq.) was used. n-BuLi was used with double amount: deprotonation and then exchange. Purified by silica gel column chromatography using hexane/Acetone (0% to 30% Acetone gradient) to give the product (75.7 mg, 167 μmol, 67% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.25 (hexane/Acetone, 30% Acetone). 1 H NMR: (500 MHz, CDCl3) δ 7.79 (s, 1H), 7.47 (s, 1H), 7.15 (d, J = 8.4 Hz, 1H), 6.71 (s, 1H), 4.35 – 3.79 (m, 2H), 2.58 (s, 3H), 1.49 (s, 9H), 1.38 (s, 9H), 1.34 – 1.16 (m, 12H) ppm. 13 C NMR:(126 MHz, CDCl3) δ 159.56, 152.54, 136.86, 133.60, 123.14, 122.68, 80.58, 62.33, 46.75, 45.08, 28.31, 23.72, 21.71, 21.52, 20.90, 20.76, 20.34 ppm. Specific rotation: = -33.81 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 23 H 39 N 3 NaO 4 S [M+Na + ] 476.2553; found 476.2549. Enantiomeric excess: 95% ee. HPLC Conditions: Daicel Chiralpak IB column, 95:05 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 5.847 min, minor: 7.053 min. GP-1 was followed with no additional modifications: Commercially available 1- bromo-3-fluorobenzene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (70.1 mg, 205 μmol, 82% yield) as a white solid. Physical characteristics: White amorphous solid. TLC: R f = 0.25 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.59 – 7.44 (m, 3H), 7.29 (tdd, J = 8.2, 2.6, 1.1 Hz, 1H), 4.05 (s, 2H), 1.38 (s, 9H), 1.33 – 1.13 (m, 12H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 162.60 (d, J = 251.2 Hz), 159.34, 137.81 (d, J = 6.3 Hz), 130.51 (d, J = 7.6 Hz), 125.97 (d, J = 3.2 Hz), 120.17 (d, J = 21.2 Hz), 117.54 (d, J = 24.2 Hz), 61.04, 46.62, 45.39, 23.78, 21.81, 20.89, 20.81 ppm. 19 F NMR: (471 MHz, CDCl3) δ -110.39 ppm. Specific rotation: [α] = -13.65 (c 1.00, CHCl3) HRMS: Calc’d for C17H28FN2O2S [M+H + ] 343.1850; found 343.1853. Enantiomeric excess: 95% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 12.113 min, minor: 13.687 min. GP-1 was followed with no additional modifications: Commercially available 3- bromoanisole (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (71.7 mg, 202 μmol, 81% yield) as a white solid. Physical characteristics: White amorphous solid. TLC: R f = 0.20 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.42 (t, J = 8.0 Hz, 1H), 7.36 – 7.30 (m, 2H), 7.11 (ddd, J = 8.2, 2.5, 1.0 Hz, 1H), 4.30 – 3.88 (m, 2H), 3.83 (s, 3H), 1.38 (s, 9H), 1.36 – 1.06 (m, 12H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.93, 159.59, 136.52, 129.79, 122.36, 119.40, 115.01, 60.90, 55.68, 46.35, 45.38, 23.82, 21.82, 21.04 ppm. Specific rotation: GP-1 was followed with no additional modifications: commercially available 1- bromo-3-(tert-butyl) benzene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (68.4 mg, 180 μmol, 72% yield) as a white solid. Physical characteristics: White amorphous solid. TLC: R f = 0.20 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 3.96 (s, 1H), 4.19 (s, 1H), 1.32 (s, 9H), 7.76 (t, J = 2.0 Hz, 1H), 7.62 – 7.57 (m, 2H), 7.45 (t, J = 7.8 Hz, 1H), 1.35 (s, 15H), 1.16 (dd, J = 21.0, 7.0 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.62, 151.98, 134.54, 129.96, 128.69, 127.55, 127.14, 60.63, 46.52, 45.22, 35.04, 31.28, 23.71, 21.80, 20.98, 20.90 ppm. Specific rotation: [α] = -14.47 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 21 H 37 N 2 O 2 S [M+H + ] 381.2570; found 381.2572. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 9.720 min, minor: 14.593 min. GP-1 was followed with no additional modifications: Commercially available 4- bromo-1,2-dimethylbenzene was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (73.3 mg, 207 μmol, 83% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.15 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.55 (d, J = 2.0 Hz, 1H), 7.45 (dd, J = 8.0, 2.0 Hz, 1H), 7.26 (d, 1H), 4.13 (s, 1H), 3.99 (s, 1H), 2.30 (t, J = 1.1 Hz, 6H), 1.37 (s, 15H), 1.16 (dd, J = 25.2, 6.8 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.76, 142.38, 137.61, 132.12, 131.20, 130.17, 127.64, 60.62, 46.44, 45.21, 23.78, 21.84, 21.00, 20.87, 20.12, 20.04 ppm. Specific rotation: [α] = +1.08 (c 1.00, CHCl3) HRMS: Calc’d for C19H33N2O2S [M+H + ] 353.2257; found 353.2260. Enantiomeric excess: 98% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 30.753 min, minor: 43.480 min. GP-1 was followed with no additional modifications: commercially available 4- bromo-1,2-dimethylbenzene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (71.6 mg, 192 μmol, 77% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.20 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.74 (d, J = 1.9 Hz, 1H), 7.53 (dd, J = 8.0, 1.9 Hz, 1H), 7.38 (dd, J = 8.0, 0.9 Hz, 1H), 4.26 – 4.05 (m, 1H), 3.97 (s, 1H), 2.43 (s, 3H), 1.38 (s, 9H), 1.37 – 1.30 (m, 6H), 1.23 – 1.11 (m, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 159.44, 141.76, 135.38, 134.28, 131.36, 130.65, 128.25, 60.96, 46.65, 45.37, 23.76, 21.80, 20.94, 20.82, 20.42 ppm. Specific rotation: [α] = -2.06 (c 1.00, CHCl3 ) HRMS: Calc’d for C 18 H 30 ClN 2 O 2 S [M+H + ] 373.1711; found 373.1714. Enantiomeric excess: 98% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 18.407 min, minor: 20.020 min. GP-1 was followed with no additional modifications: Commercially available 4- bromo-1-chloro-2-fluorobenzene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (71.5 mg, 190 μmol, 76% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.30 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.84 (dd, J = 6.7, 2.3 Hz, 1H), 7.64 (ddd, J = 8.7, 4.3, 2.3 Hz, 1H), 7.29 (t, J = 8.5 Hz, 1H), 4.04 (d, J = 96.8 Hz, 2H), 1.39 (s, 9H), 1.33 (s, 6H), 1.17 (dd, J = 24.9, 6.7 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 162.04, 159.58 (d, J = 104.2 Hz), 132.93, 132.42 (d, J = 4.0 Hz), 130.42 (d, J = 8.3 Hz), 122.57 (d, J = 18.7 Hz), 117.27 (d, J = 22.5 Hz), 61.19, 46.72, 45.43, 23.73, 21.75, 20.87, 20.83 ppm. 19 F NMR: (471 MHz, CDCl3) δ -107.84 ppm. Specific rotation: = -5.67 (c 1.00, CHCl3) HRMS: Calc’d for C 17 H 27 ClFN 2 O 2 S [M+H + ] 377.1460; found 377.1454. Enantiomeric excess: 96% ee. HPLC Conditions: Daicel Chiralpak IA column, 95:05 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 11.120 min, major: 14.553 min. GP-1 was followed with no additional modifications: Commercially available 2- bromo-4-chlorotoluene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (67.2 mg, 180 μmol, 72% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.25 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.81 (s, 1H), 7.39 (dd, J = 8.2, 2.3 Hz, 1H), 7.30 – 7.18 (m, 1H), 4.06 (d, J = 159.9 Hz, 2H), 2.63 (d, J = 9.5 Hz, 3H), 1.40 (d, J = 9.4 Hz, 9H), 1.35 – 1.14 (m, 12H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.39, 135.30, 134.51, 132.63, 132.13, 62.48, 46.85, 45.22, 23.68, 21.58, 21.25 – 20.22 (m) ppm. Specific rotation: [α] = -36.40 (c 1.00, CHCl3) HRMS: Calc’d for C18H30ClN2O2S [M+H + ] 373.1711; found 373.1710. Enantiomeric excess: 98% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minorr: 8.587 min, major: 11.913 min. GP-1 was followed with no additional modifications: Commercially available 1- bromo-3-chlorobenzene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (74.3 mg, 207 μmol, 83% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.30 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.76 (s, 1H), 7.64 (dt, J = 8.0, 1.3 Hz, 1H), 7.55 (ddd, J = 8.0, 2.1, 1.1 Hz, 1H), 7.47 (t, J = 7.9 Hz, 1H), 4.29 – 3.86 (m, 2H), 1.38 (s, 9H), 1.35 – 1.16 (m, 12H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.31, 137.38, 135.34, 133.06, 130.21, 130.10, 128.27, 61.07, 46.70, 45.47, 23.76, 21.61, 20.96 ppm. Specific rotation: [α] = -7.86 (c 1.00, CHCl3) HRMS: Calc’d for C17H28ClN2O2S [M+H + ] 359.1555; found 359.1560. Enantiomeric excess: 97% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 12.227 min, minor: 14.347 min. GP-1 was followed with no additional modifications: Commercially available β- bromostyrene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (49.0 mg, 140 μmol, 56% yield) as a white amorphous solid. Only Z isomer was detected after purification. Physical characteristics: White amorphous solid. TLC: Rf = 0.20 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.56 – 7.51 (m, 3H), 7.41 – 7.37 (m, 3H), 6.92 (d, J = 15.5 Hz, 1H), 4.05 (s, 2H), 1.46 (s, 9H), 1.35 – 1.14 (m, 12H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.46, 146.18, 133.28, 130.80, 129.02, 128.72, 122.06, 60.49, 45.25, 23.73, 21.55, 20.91 ppm. Specific rotation: [α] = +0.64 (c 1.00, CHCl3) HRMS: Calc’d for C 19 H 31 N 2 O 2 S [M+H + ] 351.2101; found 351.2105. Enantiomeric excess: 98% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 14.640 min, major: 16.007 min. Prepared from a known procedure (J. Am. Chem. Soc.2020, 142, 38, 16205–16210) to afford a white amorphous solid (3.5 g, 92%). Physical characteristics: White amorphous solid. TLC: Rf = 0.35 (hexane/EtOAc, 10% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.84 (dd, J = 6.7, 2.3 Hz, 1H), 7.64 (ddd, J = 8.7, 4.3, 2.3 Hz, 1H), 7.29 (t, J = 8.5 Hz, 1H), 4.04 (d, J = 96.8 Hz, 2H), 1.39 (s, 9H), 1.33 (s, 6H), 1.17 (dd, J = 24.9, 6.7 Hz, 6H) ppm. 13 C NMR: 13C NMR (126 MHz, Chloroform-d) δ 144.99, 143.63 (q, J = 38.4 Hz), 139.54, 138.47, 132.37, 129.70, 128.83, 126.99, 126.13, 122.29, 121.34 (q, J = 269.0 Hz), 105.82 (d, J = 2.2 Hz), 21.45 ppm. 19 F NMR: (471 MHz, CDCl 3 ) δ -107.84 ppm. HRMS: Calc’d for C 17 H 13 BrF 3 N 2 [M+H + ] 381.0209; found 381.0206. GP-1 was followed with no additional modifications: The halide prepared above (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using DCM/EtOAc (0% to 10% EtOAc gradient) to give the product (95.9 mg, 175 μmol, 70% yield) as a white solid. TLC: Rf = 0.35 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.84 (dd, J = 6.7, 2.3 Hz, 1H), 7.64 (ddd, J = 8.7, 4.3, 2.3 Hz, 1H), 7.29 (t, J = 8.5 Hz, 1H), 4.04 (d, J = 96.8 Hz, 2H), 1.39 (s, 9H), 1.33 (s, 6H), 1.17 (dd, J = 24.9, 6.7 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.18, 145.36, 144.11 (q, J = 38.5 Hz), 142.72, 139.78, 134.79, 131.15, 129.83, 128.83, 125.74, 125.02, 121.16 (q, J = 269.2 Hz), 106.51 – 106.22 (m), 61.00, 47.12, 45.33, 23.61, 21.37 ppm. 19 F NMR: (471 MHz, CDCl 3 ) δ -107.84 ppm. Specific rotation: [α] = +42.52 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 28 H 35 F 3 N 4 NaO 2 S [M+Na + ] 571.2325 found 571.2330. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 7.687 min, minor: 12.373 min. GP-3 was followed with additional modifications mentioned: The aryl bromide was prepared using a known procedure. 2 MeLi (0.124 mL, 0.384 mmol, 3.1 M, 1.2 eq.) was added to a solution of the aryl bromide (0.320 mmol, 1 eq.) in Et2O (2.5 mL) at -78 ºC and stirred for 30 minutes followed by the addition of n-BuLi (0.30 mL, 0.48 mmol, 1.6 M, 1.5 eq.). The reaction mixture stirred at -78 ºC for 1 hour before warming to -40 ºC where it stirred for an additional 30 minutes before cooling to -78 ºC. A solution of t-BuSF (128 mg, 0.48 mmol, 1.5 eq.) in Et 2 O (0.7 mL) was added dropwise at -78 ºC then warmed to -20 ºC over 1.5 hours. No modification to the quench and work-up were made. Purification by silica gel column chromatography using Hex/EtOAc (0% to 60% EtOAc gradient) provided the product (96.0 mg, 0.172 mmol, 54% yield) as a white amorphous solid. Physical characteristic: White amorphous solid. TLC: R f = 0.39 (DCM/MeOH, 5% MeOH). 1 H NMR: (500 MHz, CDCl3) δ 10.93 (s, 1H), 8.80 (d, J = 2.4 Hz, 1H), 7.94 (dd, J = 8.8, 2.4 Hz, 1H), 7.18 (d, J = 8.8 Hz, 1H), 4.37 (qd, J = 7.0, 1.3 Hz, 2H), 4.26 (s, 3H), 4.15 – 4.06 (m, 1H), 4.06 – 3.93 (m, 1H), 2.87 (t, J = 7.5 Hz, 2H), 1.86 – 1.77 (m, 2H), 1.64 (t, J = 7.0 Hz, 3H), 1.42 (s, 9H), 1.40 (d, J = 7.6 Hz, 6H), 1.14 (d, J = 6.8 Hz, 3H), 1.10 (d, J = 6.8 Hz, 3H), 0.98 (t, J = 7.4 Hz, 3H) ppm. 13 C NMR: 13 C NMR (126 MHz, CDCl3) δ 159.5, 159.5, 153.7, 146.8, 146.8, 138.4, 134.3, 132.9, 128.2, 124.5, 120.8, 113.2, 66.1, 60.9, 45.2, 38.2, 29.7, 27.6, 23.6, 22.3, 21.8, 20.8, 20.7, 14.6, 14.0 ppm. Specific rotation: [α] = -55.56 (c 0.8, CHCl 3 ) HRMS: Calc’d for C 28 H 42 N 6 O 4 SNa [M+Na + ] 581.2880 found 581.2886. Enantiomers were unable to be separated. GP-1 was followed with no additional change: Commercially available thiophene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (66.0 mg, 200 μmol, 80% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.25 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.71 (dd, J = 5.0, 1.4 Hz, 1H), 7.55 (dd, J = 3.7, 1.4 Hz, 1H), 7.15 (dd, J = 5.0, 3.7 Hz, 1H), 4.23 – 3.84 (m, 2H), 1.45 (s, 9H), 1.30 (d, J = 7.2 Hz, 6H), 1.20 (d, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 159.12, 136.07, 135.66, 134.35, 127.95, 61.74, 46.83, 45.31, 23.85, 21.70, 20.94, 20.86 ppm. Specific rotation: [α] = -28.81 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 15 H 27 N 2 O 2 S 2 [M+H + ] 331.1508; found 331.1509. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 20.673 min, minor: 23.813 min. GP-1 was followed with no additional change: Commercially available 2-bromo-5- chloro-thiophene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 45% EtOAc gradient) to give the product (74.6 mg, 205 μmol, 82% yield) as a white amorphous solid. GP-2 was used for a gram scale synthesis with no change in yield or enantiopurity of product. Physical characteristics: White amorphous solid. TLC: Rf = 0.50 (hexane/EtOAc, 33% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.33 (d, J = 4.0 Hz, 1H), 6.99 (d, J = 4.0 Hz, 1H), 4.03 (s, 2H), 1.47 – 1.44 (m, 10H), 1.28 – 1.20 (m, 12H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 158.87, 139.33, 135.05, 134.11, 127.65, 61.99, 46.05, 23.82, 21.30 ppm. Specific rotation: [α] = -33.04 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 15 H 26 ClN 2 O 2 S 2 [M+H + ] 365.1119; found 365.1122. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IA column, 95:05 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 12.760 min, major: 14.920 min. GP-1 was followed with no additional change: Commercially available benzo[b]thiophene (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (85.5 mg, 225 μmol, 90% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.10 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.90 – 7.81 (m, 3H), 7.48 – 7.40 (m, 2H), 4.08 (s, 2H), 1.51 (s, 9H), 1.26 (s, 12H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 159.14, 143.63, 138.39, 137.06, 133.20, 127.03, 125.81, 125.26, 122.58, 62.08, 45.46, 23.98, 21.79, 21.03 ppm. Specific rotation: = -11.42 (c 1.00, CHCl3) HRMS: Calc’d for C19H29N2O2S2 [M+H + ] 381.1665; found 381.1668. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 33.574 min, major: 40.653min. GP-1 was followed with no additional change: Commercially available 5- bromobenzo[d][1,3]dioxole (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (68.1 mg, 185 μmol, 74% yield) as a white amorphous solid. GP-2 was also used to give no significant change in yield or enantiopurity of the product. Physical characteristics: White amorphous solid. TLC: R f = 0.20 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.32 (dd, J = 8.2, 1.8 Hz, 1H), 7.17 (s, 1H), 6.91 (d, J = 8.2 Hz, 1H), 6.09 – 6.03 (m, 2H), 4.06 (d, J = 35.2 Hz, 2H), 1.37 (s, 9H), 1.36 – 1.29 (m, 6H), 1.16 (dd, J = 21.9, 6.8 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 159.55, 151.85, 148.29, 128.20, 125.82, 110.24, 108.49, 102.40, 61.04, 46.34, 45.29, 23.80, 21.89, 21.83, 20.96, 20.87 ppm. Specific rotation: [α] = +1.57 (c 1.00, CHCl 3 ) HRMS: Calc’d for C18H29N2O4S [M+H + ] 369.1843; found 369.1840. Enantiomeric excess: 98% ee. HPLC Conditions: Daicel Chiralpak IB column, 95:05 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 19.647 min, minor: 23.007 min. GP-1 was followed with no additional change: Commercially available 4- bromothiazole (0.375 mmol, 1.5 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (72.8 mg, 178 μmol, 71% yield) as a white crystalline solid. Physical characteristics: White crystalline solid. TLC: R f = 0.30 (hexane/EtOAc, 40% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.62 (s, 1H), 4.01 (s, 2H), 1.53 (s, 9H), 1.34 – 1.27 (m, 6H), 1.15 (dd, J = 21.5, 6.8 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 165.67, 158.42, 126.77, 125.50, 62.52, 46.81, 45.63, 23.99, 21.76, 20.76, 20.63 ppm. Specific rotation: [α] = -32.43 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 14 H 24 BrN 3 NaO 2 S 2 [M+Na + ] 432.0386; found 432.0363. Melting Point: 140-142 °C Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 8.553 min, minor: 10.347 min. GP-3 was followed with additional changes mentioned: Commercially available 4- bromopyrazole (0.375 mmol, 1.5 eq.) was used with an increased equivalents of n-BuLi (from 1.5 to 3 eq.). The reaction was warmed to room temperate to be complete. The compound is not UV active and PMA stain was used TLC visualization. Purified by silica gel column chromatography using DCM/MeOH (0% to 10% MeOH gradient) to give the product (62 mg, 197.5 μmol, 79% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.40 (DCM/MeOH, 10% MeOH) 1 H NMR: (500 MHz, CDCl 3 ) δ 7.62 (s, 2H), 4.36 – 3.78 (m, 2H), 1.38 (s, 9H), 1.30 (d, J = 7.5 Hz, 12H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 160.55, 137.17, 113.69, 60.53, 47.06, 45.57, 23.17, 21.40, 20.97 ppm. Specific rotation: = -76.09 (c 1.00, CHCl3) HRMS: Calc’d for C14H27N4O2S [M+H + ] 315.1849; found 315.1840. Enantiomeric excess: 95% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n- hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 13.313 min, major: 14.873 min. GP-3 was followed with additional changes mentioned: tert-butyl 3-(4-bromo-1H- pyrazol-1-yl)azetidine-1-carboxylate was prepared by a known procedure. 3 CPME was used as the solvent instead of Et 2 O and 2.2 eq. of t-BuLi was used. The reaction was warmed -20 ºC before quenching (full Li–Br exchange was not achieved). Purified by silica gel column chromatography using Hex/EtOAc (0% to 100% EtOAc gradient) to give the product (65 mg, 0.138 mmol, 55% yield) as a colorless foam. Physical characteristics: Colorless foam. TLC: Rf = 0.19 (hexanes/EtOAc, 80% EtOAc) 1 H NMR: (500 MHz, CDCl 3 ) δ 7.85 (s, 1H), 7.60 (s, 1H), 4.99 (tt, J = 7.7, 5.5 Hz, 1H), 4.34 – 4.26 (m, 4H), 4.06 (s, 1H), 3.83 (s, 1H), 1.39 (s, 9H), 1.34 (s, 9H), 1.19 (d, J = 6.9 Hz, 6H), 1.14 (d, J = 5.5 Hz, 3H), 1.11 (d, J = 5.8 Hz, 3H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 159.2, 156.0, 141.1, 133.5, 116.8, 80.4, 60.4, 56.3, 50.9, 46.6, 45.2, 28.3, 23.3, 21.5, 21.1, 20.8 ppm. Specific rotation: = -63.03 (c 1.00, CHCl3) HRMS: Calc’d for C22H40N5O4S [M+H + ] 470.2796; found 470.2787. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 51.29 min, major: 35.48 min. GP-3 was followed with additional changes mentioned: Commercially available 5- iodo-1H-indole (0.275 mmol, 1.1 eq.) was used. CPME was used instead of Et2O and 2.5 eq. of t-BuLi was used for the Li-I exchange (-78 ºC, 75 minutes). Warmed to -20 ºC and held for 1 hour before quenching. No modifications to the quench or work-up procedure were made. Purified by silica gel column chromatography using Hex/EtOAc (0% to 60% EtOAc gradient) to give the product (58 mg, 0.160 mmol, 64% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.16 (hexanes/EtOAc, 60% EtOAc) 1 H NMR: 1 H NMR (500 MHz, CDCl3) δ 10.31 (s, 1H), 7.84 (d, J = 2.0 Hz, 1H), 7.10 – 7.04 (m, 2H), 6.66 (d, J = 8.5 Hz, 1H), 6.28 (s, 1H), 4.49 – 4.23 (m, 1H), 4.16 – 3.96 (m, 1H), 1.46 – 1.38 (m, 6H), 1.35 (s, 9H), 1.34 – 1.28 (m, 6H) ppm. 13 C NMR: 13 C NMR (126 MHz, CDCl 3 ) δ 160.47, 137.82, 127.54, 127.18, 124.04, 122.46, 120.71, 111.69, 102.28, 61.00, 46.94, 45.23, 23.60, 21.59, 21.06 ppm. Specific rotation: [α] = -37.62 (c 0.90, CHCl 3 ) HRMS: Calc’d for C 19 H 29 N 3 O 2 SNa [M+Na + ] 386.1873; found 386.1871. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IB column, 90:10 n- hexane:i-PrOH, flow rate: 1 mL/min, 25 °C, UV detection wavelength: 254 nm, retention time: minor: 7.94 min, major: 7.09 min. GP-3 was followed with additional changes mentioned: Commercially available 4- bromo-1H-pyrrolo[2,3-b]pyridine (0.275 mmol, 1.1 eq.) was used. CPME was used instead of Et 2 O and 2.5 eq. of t-BuLi was used for the Li-I exchange (-78 ºC, 70 minutes: full exchange). Warmed to -10 ºC and held for 2 hours before quenching. No modifications to the quench or work-up procedure were made. Purified by silica gel column chromatography using Hex/EtOAc (0% to 60% EtOAc gradient) to give the product (75 mg, 0.208 mmol, 82% yield) as a clear colorless oil. Physical characteristics: Clear colorless oil. TLC: Rf = 0.24 (hexanes/EtOAc, 60% EtOAc) 1 H NMR: (500 MHz, CDCl3) δ 10.55 (s, 1H), 8.35 (d, J = 4.9 Hz, 1H), 7.50 – 7.29 (m, 1H), 7.24 (t, J = 2.9 Hz, 1H), 6.75 – 6.70 (m, 1H), 4.41 – 4.16 (m, 1H), 4.08 – 3.86 (m, 1H), 1.41 (d, J = 6.7 Hz, 6H), 1.39 (s, 9H), 1.23 (d, J = 6.7 Hz, 3H), 1.16 (d, J = 6.6 Hz, 3H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.7, 149.6, 141.6, 134.5, 128.7, 119.1, 117.1, 101.1, 62.0, 46.7, 45.4, 23.7, 21.9, 21.7, 20.9, 20.8 ppm. Specific rotation: = -3.57 (c 1.00, CHCl3) HRMS: Calc’d for C18H28N4O2SNa [M+Na + ] 387.1825; found 387.1829. Enantiomeric excess: 97% ee. HPLC Conditions: Daicel Chiralpak IB column, 95:5 n- hexane:i-PrOH, flow rate: 1 mL/min, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 21.31 min, major: 25.84 min. GP-3 was followed with additional changes mentioned: commercially available tert- butyl (5-bromopyridin-2-yl)carbamate (0.375 mmol, 1.5 eq.) was used. The reaction was warmed to 0 °C to be complete. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (57.2 mg, 130 μmol, 52% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.25 (hexane/EtOAc, 40% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 8.61 (d, J = 2.5 Hz, 1H), 8.52 (s, 1H), 8.13 (d, J = 8.9 Hz, 1H), 7.92 (dd, J = 9.0, 2.4 Hz, 1H), 4.14 (s, 1H), 3.93 (s, 1H), 1.54 (s, 9H), 1.37 (s, 9H), 1.34 – 1.29 (m, 6H), 1.16 (dd, J = 21.0, 6.8 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.21, 155.40, 152.13, 149.93, 140.13, 125.22, 111.82, 82.24, 61.03, 46.71, 45.35, 28.35, 23.58, 21.77, 21.70, 20.90, 20.83 ppm. Specific rotation: = +41.19 (c 0.50, CHCl3) HRMS: Calc’d for C21H37N4O4S [M+H + ] 441.2530; found 441.2537. Enantiomeric excess: 91% ee. HPLC Conditions: Daicel Chiralpak IB column, 95:05 n- hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 14.873 min, major: 18.100 min. GP-2 was followed with additional changes mentioned: commercially available cyclopropylbromide (0.375 mmol, 1.5 eq.) was used and lithiated with t-BuLi (3 eq.) at -78 ºC. Purified by silica gel column chromatography using hexane/EtOAc (0% to 60% EtOAc gradient) to give the product (51.0 mg, 176 μmol, 70% yield) as a white crystalline solid. Different scale reactions: GP-2 was used with t-BuSF (5.65 g, 21.2 mmol, 1 eq.), cyclopropyl bromide (3.40 mL, 42.4 mmol, 2 eq.), and t-BuLi (25 mL, 42.4 mmol, 1.7 M, 2 eq.) to give an identical yield and enantiopurity (4.28g, 14.8 mmol, 70% yield, 97% ee). Physical characteristics: White crystalline solid. TLC: R f = 0.2 (hexane/EtOAc, 40% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 4.00 (s, 2H), 2.51 – 2.40 (m, 1H), 1.60 (ddt, J = 10.2, 7.5, 5.1 Hz, 1H), 1.48 (s, 9H), 1.29 – 1.12 (m, 14H), 1.11 – 1.01 (m, 1H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 158.80, 62.55, 46.48, 45.21, 24.76, 24.37, 21.42, 21.17, 7.48, 5.15 ppm. Specific rotation: = +15.99 (c 1.00, CHCl3) HRMS: Calc’d for C 14 H 29 N 2 O 2 S [M+H + ] 289.1944; found 289.2952. Melting Point: 175-177 °C Enantiomeric excess: 97% ee. Recrystallized to > 99% ee with > 90% recovery. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 10.773 min, major: 11.887 min. Second functionalization of t-BuSF reagent: chiral sulfonimidoyl fluoride, sulfoximine and sulfonimidamide product characterization data. GP-4 was followed with no additional change: tert-butyl phenyl sulfoximine of > 99% ee was used (97 mg, 0.30 mmol, 1 eq.). Purified by a short plug of silica gel eluting with DCM to give the product (71.0 mg, 0.264 mmol, 88% yield) as a white amorphous solid. Different scale reactions: (1.24 g, 3.82 mmol, > 99% ee) produced (0.88 g, 3.28 mmol, 86% yield, > 99% ee) (3.01 g, 9.28 mmol, > 99% ee) produced (2.22g, 8.27 mmol, 89% yield, > 99% ee) Physical characteristics: White amorphous solid. TLC: Rf = 0.33 (hexane/acetone, 33% acetone). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.61 (dd, J = 7.9, 1.8 Hz, 2H), 7.48 – 7.42 (m, 3H), 7.37 (s, 1H), 3.74 (hept, J = 6.8 Hz, 2H), 1.24 (d, J = 4.1 Hz, 6H), 1.23 (d, J = 4.1 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 153.70, 144.38, 131.27, 129.18, 125.22, 46.88, 21.29, 20.90 ppm. Specific rotation: = -149.55 (c 1.00, CHCl3) HRMS: Calc’d for C13H20N2O2SNa [M+Na + ] 291.1138; found 291.1144. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IA column, 50:50 n-hexane:DCM, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 14.55 min, major: 18.83 min. GP-6 was followed and no additional change: tert-butyl phenyl sulfoximine of > 99% ee was used (500 mg, 1.5 mmol, 1.0 eq). Purified by silica gel column chromatography using hexane/EtOAc (0% to 25% EtOAc gradient) to give the product (370 mg, 1.3 mmol, 84% yield) as a white crystalline solid. Different scale reactions: (1.0 g, 3.08 mmol, > 99% ee) produced (689 mg, 2.41 mmol, 78% yield, > 99% ee) (2.0 g, 6.16 mmol, >99% ee) produced (1.31 g, 4.57 mmol, 74% yield, > 99% ee) Physical characteristics: White crystalline solid. TLC: R f = 0.3 (hexane/EtOAc, 20% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 8.09 – 8.02 (m, 2H), 7.76 – 7.69 (m, 1H), 7.61 (t, J = 7.9 Hz, 2H), 4.16 (s, 1H), 3.84 (s, 1H), 1.31 (dd, J = 6.9, 3.4 Hz, 6H), 1.21 (t, J = 6.6 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 153.30 (d, J = 3.2 Hz), 135.39 (d, J = 22.6 Hz), 134.98, 129.56, 127.72, 48.28, 45.89, 21.25, 20.59, 20.52 ppm. 19 F NMR: (471 MHz, CDCl 3 ) δ 69.53 ppm. Specific rotation: [α] = +30.26 (c 1.00, CHCl 3 ) HRMS: Calc’d for C13H20FN2O2S [M+H + ] 287.1224; found 287.1224. Melting Point: 102-105 °C Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n- hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 13.293 min, major: 15.493 min. GP-6 was followed and no additional change: tert-butyl cyclopropyl sulfoximine of > 99% ee was used (1.04 mmol, 1.0 eq) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 25% EtOAc gradient) to give the product (232 mg, 0.927 mmol, 89% yield) as colorless oil which slowly solidified into a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.3 (hexane/EtOAc, 20% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 4.15 (s, 1H), 3.80 (s, 1H), 3.36 (dq, J = 8.2, 3.9 Hz, 1H), 1.55 – 1.43 (m, 2H), 1.33 – 1.27 (m, 6H), 1.25 (dq, J = 7.9, 1.7 Hz, 2H), 1.19 (d, J = 6.4 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 154.09 (d, J = 3.3 Hz), 48.11, 45.72, 30.10 (d, J = 27.0 Hz), 20.90 (d, J = 72.0 Hz), 7.24, 6.50 ppm. 19 F NMR: (471 MHz, CDCl3) δ 62.06 ppm. Specific rotation: = +38.58 (c 1.00, CHCl3) HRMS: Calc’d for C 10 H 20 N 2 O 2 S [M+H + ] 251.1224; found 251.1218. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 7.413 min, major: 8.187 min. GP-7 (Grignard reagent) was followed with no additional modification: Commercially available 4-chlorophenylmagnesium bromide (0.275 mmol, 1.1 eq., 1.0 M solution in Et 2 O) from Sigma-Aldrich was used with Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.). Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (89.8 mg, 0.237 mmol, 95% yield, > 99% ee) as a white amorphous solid. GP-8 (turbo-Grignard reagent) was followed with additional modifications mentioned: Commercially available 4-chloro-bromobenzene (0.275 mmol, 1.1 eq.) in dry THF (0.2 mL) was added at room temperature in one portion to the stirring isopropylmagnesium chloride lithium chloride complex solution (0.21 mL, 0.275 mmol, 1.1 eq. 1.3 M in THF), exchange takes about 12 hours. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (56.7 mg, 0.15 mmol, 60% yield, > 99% ee) as a white amorphous solid. GP-1 (organolithium) was followed with no additional modificaitons: Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (75.6 mg, 0.2 mmol, 80% yield, 94% ee) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.6 (hexane/EtOAc, 50% EtOAc). 1 H NMR (600 MHz, CDCl3) δ 7.96 – 7.93 (m, 2H), 7.88 – 7.84 (m, 2H), 7.56 – 7.52 (m, 1H), 7.52 – 7.48 (m, 2H), 7.46 – 7.42 (m, 2H), 4.12 (br, 2H), 1.28 (s, 12H) ppm. 13 C NMR (151 MHz, CDCl3) δ 158.66, 140.97, 140.23, 139.28, 132.96, 129.74, 129.55, 129.10, 127.68, 46.28, 21.28 ppm. Specific rotation: [α] = -3.42 (c 1.00, CHCl 3 ) Melting Point: 129-131 ºC HRMS: Calc’d for C19H24ClN2O2S + [M+H + ] 379.1242; found 379.1242. Enantiomeric excess: > 99% ee for both Grignard and turbo-Grignard reagents.94% ee for organolithium reagent. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i- PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 18.860 min, major: 22.380 min. GP-8 was used with additional modifications mentioned: A solution of commercially available 4-iodobenzonitrile (63 mg, 0.275 mmol, 1.1 eq.) in dry THF (0.25 ml) was added to isopropylmagnesium chloride lithium chloride complex solution (0.21 mL, 0.275 mmol, 1.1 eq. 1.3 M in THF) dropwise at -78 ºC. Upon gradual warming up to - 10 ºC for 4 hours (the reaction mixture turned yellow), then a solution of Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.) in THF (0.25 mL) was added, workup procedure as described in GP-8. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (90.4 mg, 0.245 mmol, 98% yield) as a colorless oil. GP-12 was followed with the Mg–X exchange as described above with 2 equivalents of turbo-Grignard reagent: Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.) was used to provide (65 mg, 176 mmol, 70% yield) as colorless oil. Physical characteristics: Colorless oil. TLC: R f = 0.71 (hexane/EtOAc, 50% EtOAc). 1 H NMR (500 MHz, CDCl3) δ 8.03 – 7.99 (m, 2H), 7.99 – 7.95 (m, 2H), 7.73 (d, J = 8.4 Hz, 2H), 7.59 – 7.54 (m, 1H), 7.51 (dd, J = 8.4, 6.7 Hz, 2H), 4.28 (br, 1H), 3.92 (br, 1H), 1.55 – 0.96 (m, 12H) ppm. 13 C NMR (126 MHz, CDCl3) δ 158.33, 158.33, 146.62, 146.62, 139.48, 139.48, 133.50, 133.50, 133.06, 133.06, 129.69, 129.69, 128.15, 128.15, 127.88, 127.88, 117.41, 117.41, 116.05, 116.05, 47.02, 47.02, 45.60, 45.60, 21.28, 21.28 ppm. Specific rotation: = -19.16 (c 1.00, CHCl3) HRMS: Calc’d for C20H24N3O2S + [M+H + ] 370.1584; found 370.1576. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 254 nm, retention time: minor: 28.347 min, major: 35.253 min. GP-8 was used with additional modifications mentioned: A solution of commercially available methyl 3-iodobenzoate (72.1 mg, 0.275 mmol, 1.1 eq.) in dry THF (0.25 mL) was added to isopropylmagnesium chloride lithium chloride complex solution (0.21 mL, 0.275 mmol, 1.1 eq. 1.3 M in THF) dropwise at -78 ºC, to. Upon gradual warming up to -10 ºC for 4 hours (the reaction mixture turned yellow) then a solution of Ph- sulfonimidoyl fluoride (0.25 mmol, 1 eq.) in THF (0.25 mL) was added. Work-up procedure as described in GP-8. Purified by silica gel column chromatography using DCM/acetone, (0% to 10% Acetone gradient) to give the product (63.4 mg, 0.158 mmol, 63% yield) as a colorless oil. Physical characteristics: Colorless oil. TLC: Rf = 0.84 (DCM/acetone, 10% acetone). 1 H NMR (500 MHz, CDCl 3 ) δ 8.58 (t, J = 1.8 Hz, 1H), 8.15 (dt, J = 7.8, 1.4 Hz, 1H), 8.11 (ddd, J = 8.0, 2.0, 1.2 Hz, 1H), 8.01 – 7.93 (m, 2H), 7.56 (t, J = 7.9 Hz, 1H), 7.53 – 7.46 (m, 3H), 4.19 (br, 2H), 3.90 (s, 3H), 1.29 (s, 12H) ppm. 13 C NMR (126 MHz, CDCl3) δ 165.44, 158.58, 142.39, 140.64, 133.41, 132.94, 131.64, 131.53, 129.64, 129.48, 128.77, 127.68, 52.55, 46.06, 21.15 ppm. Specific rotation: [α] = -8.82 (c 1.00, CHCl3 ) HRMS: Calc’d for C 21 H 27 N 2 O 4 S + [M+H + ] 403.1686; found 403.1675. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IB column, 95:05 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 26.667 min, minor: 29.413 min. GP-8 was followed with additional modifications mentioned: Commercially available 2-bromothiophene (0.25 mmol, 1 eq.) was added at room temperature in one portion to a stirring isopropylmagnesium chloride lithium chloride complex solution (0.21 mL, 0.275 mmol, 1.1 eq. 1.3 M in THF) (exchange takes about 12 hours) then cooled to 0 ºC. A solution of Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.) in THF (0.25 mL) was added dropwise at 0 ºC then warmed to room temperature. Work-up procedure as described in GP-8. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (81.4 mg, 0.233 mmol, 93% yield) as a light-pink crystalline solid. Physical characteristics: Light-pink crystalline solid TLC: R f = 0.46 (hexane/EtOAc, 50% EtOAc). 1 H NMR (500 MHz, CDCl3) δ 7.99 – 7.95 (m, 2H), 7.59 (d, J = 4.4 Hz, 2H), 7.53 – 7.46 (m, 3H), 7.04 (t, J = 4.4 Hz, 1H), 4.09 (br, 2H), 1.29 (s, 12H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 158.38, 142.44, 142.11, 133.67, 133.13, 132.60, 129.37, 128.23, 127.28, 45.75, 21.14 ppm. Specific rotation: = 61.32 (c 1.00, CHCl3) Melting Point: 177- 179 ºC HRMS: Calc’d for C17H23N2O2S2 + [M+H + ] 351.1195; found 351.1189. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n- hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 254 nm, retention time: minor: 25.780 min, major: 29.880 min. GP-13 was followed with no additional modification: N,N-diisopropyl urea protected thiophene phenyl sulfoximine (52.5 mg, 0.15 mmol, 1 eq.) was used. Purified by silica gel column chromatography using DCM/acetone (0% to 10% acetone) to give the product (25 mg, 112 mmol, 75% yield) as a white crystalline solid. Physical characteristics: White crystalline solid. TLC: Rf = 0.7 (DCM/acetone, 10% acetone). 1 H NMR: (500 MHz, CDCl3) δ 8.11 (dd, J = 7.5, 1.8 Hz, 2H), 7.65 (dd, J = 3.8, 1.4 Hz, 1H), 7.59 (dd, J = 4.9, 1.4 Hz, 1H), 7.57 – 7.52 (m, 1H), 7.49 (dd, J = 8.4, 6.6 Hz, 2H), 7.04 (dd, J = 5.0, 3.8 Hz, 1H), 3.34 (s, 1H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 146.14, 143.33, 133.78, 133.21, 132.72, 129.18, 127.95, 127.65. ppm. Specific rotation: [α] = 14.20 (c 1.00, CHCl3) Melting Point: 123-125 ºC HRMS: Calc’d for C10H10NOS2 + [M+H + ] 224.0198; found 224.0198. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IB column, 90:10 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 254 nm, retention time: minor: 28.53 min, major: 29.94 min. GP-8 was followed with additional modifications mentioned: 3-iodo-6,7-dihydro- 5H-pyrazolo[5,1-b][1,3]oxazine (62.5 mg, 0.25 mmol) in 0.5 mL dry THF was added at 0 ºC dropwise to the stirring isopropylmagnesium chloride lithium chloride complex solution (0.21 mL, 0.275 mmol, 1.1 eq. 1.3 M in THF) which was slowly warmed to room temperature (exchange takes about 6 hours, turning into a white emulsion). Then a solution of Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.) in THF (0.25 mL) was added. Purified by silica gel column chromatography using DCM/acetone (0% to 15% acetone gradient) to give the product (87.7 mg, 0.225 mmol, 90% yield) as a white crystalline solid. Physical characteristics: White crystalline solid. TLC: R f = 0.46 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.94 – 7.90 (m, 2H), 7.64 (s, 1H), 7.49 – 7.41 (m, 3H), 4.29 (dddd, J = 36.7, 11.1, 6.6, 4.0 Hz, 2H, overlay with br, 1H), 4.05 (t, J = 6.2 Hz, 2H), 3.85 (br, 1H), 2.25 – 2.13 (m, 2H), 1.28 (d, J = 6.9 Hz, 6H), 1.17 (t, J = 8.2 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 158.71, 149.68, 142.88, 138.97, 132.13, 128.98, 126.78, 102.22, 66.59, 46.93, 44.98, 44.35, 21.40, 21.35, 21.03, 20.80, 20.74 ppm. Specific rotation: = 4.55 (c 1.00, CHCl3) Melting Point: 124-125 ºC HRMS: Calc’d for C 19 H 27 N 4 O 3 S + [M+H + ] 391.1798; found 391.1793. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IB column, 90:10 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 34.340 min, major: 42.567 min. GP-8 was followed and additional changes mentioned: A solution of isopropylmagnesium chloride lithium chloride complex solution (0.21 mL, 0.275 mmol, 1.1 eq.1.3 M in THF) was added dropwise at -40 ºC, to a solution of commercially available 3- iodo-2-chloropyridine (52.9 mg, 0.275 mmol, 1.1 eq.) in 0.25 mL dry THF. Upon gradual warming up to 0 ºC over 1 hour, the reaction mixture turned yellow, then a solution of Ph- sulfonimidoyl fluoride (0.25 mmol, 1 eq.) in THF (0.25 mL) was added, workup procedure as described in GP-8. Purified by silica gel column chromatography using DCM/acetone (0% to 9% acetone gradient) to give the product (70.2 mg, 0.185 mmol, 74% yield) as a light-yellow amorphous solid. Physical characteristics: Light-yellow amorphous solid. TLC: Rf = 0.73 (DCM/acetone, 10% acetone). 1 H NMR :(500 MHz, CDCl 3 ) δ 8.77 (dd, J = 7.9, 1.9 Hz, 1H), 8.46 (dd, J = 4.7, 1.9 Hz, 1H), 8.08 – 7.98 (m, 2H), 7.60 (t, J = 7.4 Hz, 1H), 7.55 – 7.45 (m, 3H), 4.38 (br, 1H), 3.84 (br, 1H), 1.34 (d, J = 7.0 Hz, 6H), 1.20 (dd, J = 21.1, 6.9 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 157.86, 152.51, 146.97, 141.15, 137.49, 137.27, 133.69, 129.13, 129.09, 123.48, 47.39, 45.37, 21.53, 21.44, 20.66, 20.54 ppm. Specific rotation: = - 60.07 (c 1.00, CHCl 3 ) Melting Point: 96-97 ºC HRMS: Calc’d for C 18 H 23 ClN 3 O 2 S + [M+H + ] 380.1194; found 380.1188. Enantiomeric excess: 98.7 % ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 254 nm, retention time: minor: 15.013 min, major: 18.127 min. GP-8 was followed with additional changes mentioned: 4-(5-bromopyridin-2- yl)morpholine (60.5 mg, 0.25 mmol, 1 eq.) in 0.3 mL dry THF was added at room temperature in one portion to the stirring isopropylmagnesium chloride lithium chloride complex solution (0.38 mL, 0.5 mmol, 2 eq. 1.3 M in THF) at 0 ºC then warmed to room temperature where it stirred for 12 hours (reaction mixture turned turbid orange). Upon complete Mg-halogen exchange, a solution of Ph-sulfonimidoyl fluoride (107.3 mg, 0.375 mmol, 1.5 eq.) in THF (0.5 mL) was added at 0 ºC then warmed to room temperature while monitoring by TLC. Work-up conditions were the same as described in GP-8. Purified by silica gel column chromatography using DCM/acetone (0% to 9% acetone gradient) to give the product (64.5 mg, 0.15 mmol, 60% yield) as a colorless crystalline solid. Physical characteristics: Colorless crystalline solid. TLC: R f = 0.2 (hexane/EtOAc, 50% EtOAc, light purple spot under 254 nm UV). 1 H NMR: (500 MHz, CDCl 3 ) δ 8.66 (d, J = 2.5 Hz, 1H), 7.91 (dd, J = 8.0, 1.8 Hz, 2H), 7.88 (dd, J = 9.1, 2.6 Hz, 1H), 7.51 – 7.43 (m, 3H), 6.58 (d, J = 9.2 Hz, 1H), 4.29 (s, 1H), 3.94 (s, 1H), 3.76 – 3.73 (m, 4H), 3.60 (dd, J = 5.8, 4.1 Hz, 4H), 1.35 (d, J = 6.9 Hz, 6H), 1.19 (t, J = 7.9 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 160.11, 158.70, 148.67, 142.26, 136.78, 132.29, 129.31, 127.09, 124.90, 105.77, 66.50, 46.91, 45.23, 44.86, 21.64, 20.75 ppm. Specific rotation: = 21.08 (c 1.00, CHCl 3 ) Melting Point: 118-120 ºC HRMS: Calc’d for C 22 H 31 N 4 O 3 S + [M+H + ] 431.2111; found 431.2101. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IB column, 90:10 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 34.567 min, major: 38.660 min. GP-7 was followed with no additional change: Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.) and commercially available methylmagnesium bromide from Sigma-Aldrich were used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (64.2 mg, 0.227 mmol, 91% yield) as a white crystalline solid. GP-12 was followed with no additional change: Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.) and commercially available methylmagnesium chloride (0.50 mmol, 2 eq.) from Sigma-Aldrich were used to provide (52 mg, 184 mmol, 74% yield) as white crystalline solid. Physical characteristics: White crystalline solid. TLC: Rf = 0.3 (hexane/EtOAc, 33% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.96 – 7.91 (m, 2H), 7.63 – 7.59 (m, 1H), 7.57 – 7.52 (m, 2H), 4.15 (s, 1H), 3.91 (s, 1H), 3.30 (s, 3H), 1.29 – 1.16 (m, 12H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 159.09, 140.42, 133.12, 129.43, 127.20, 46.79, 45.12, 44.97, 21.47, 21.38, 20.79 ppm. Specific rotation: = -14.51 (c 1.00, CHCl 3 ) Melting Point: 169- 170 ºC HRMS: Calc’d for C14H23N2O2S + [M+H + ] 283.1475; found 283.1474. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n- hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 18.687 min, minor: 29.860 min. GP-7 was followed with no additional change: Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.) and commercially available isopropylmagnesium chloride from Sigma-Aldrich were used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (69.8 mg, 0.225 mmol, 90% yield) as a white amorphous solid. GP-8 was used with no additional change: Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.) and commercially available isopropylmagnesium chloride lithium chloride complex solution (1.3 M in THF) from Sigma-Aldrich. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (73.6 mg, 0.237 mmol, 95% yield) as a white amorphous solid. GP-12 was followed with no additional change: Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.) and commercially available isopropylmagnesium chloride lithium chloride complex solution (0.385 mL, 2 eq., 1.3 M in THF) from Sigma-Aldrich were used to provide (53 mg, 171 mmol, 68% yield) as white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.44 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.83 – 7.80 (m, 2H), 7.61 – 7.57 (m, 1H), 7.53 (dd, J = 8.5, 6.7 Hz, 2H), 4.05 (d, J = 70.6 Hz, 2H), 3.58 (pd, J = 6.9, 1.0 Hz, 1H), 1.36 – 1.13 (m, 18H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.23, 136.23, 132.93, 129.07, 128.95, 56.10, 46.51, 45.16, 21.58, 20.79, 15.99, 15.87 ppm. Specific rotation: = 6.00 (c 1.00, CHCl3) Melting Point: 99-110 ºC HRMS: Calc’d for C16H27N2O2S + [M+H + ] 311.1788; found 311.1779. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 20.207 min, major: 23.347 min. GP-7 was followed with no additional change: Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.) and commercially available cyclopropylmagnesium chloride from Sigma- Aldrich were used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (75.4 mg, 0.245 mmol, 98% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.4 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.82 (dd, J = 7.2, 1.9 Hz, 2H), 7.57 – 7.53 (m, 1H), 7.50 (dd, J = 8.3, 6.4 Hz, 2H), 4.07 (br, 1H), 3.92 (br, 1H), 2.51 (tt, J = 8.0, 4.8 Hz, 1H), 1.47 (ddt, J = 10.2, 7.3, 5.0 Hz, 1H), 1.32 – 1.20 (m, 7H), 1.18 – 1.07 (m, 7H), 0.90 (dtd, J = 9.1, 7.5, 5.2 Hz, 1H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 158.73, 140.89, 132.61, 129.30, 127.24, 46.53, 45.09, 33.86, 21.59, 20.71, 6.70, 5.36 ppm. Specific rotation: [α] = 21.43 (c 1.00, CHCl 3 ) Melting Point: 80-81 ºC HRMS: Calc’d for C 16 H 25 N 2 O 2 S + [M+H + ] 309.1632; found 309.1632. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 18.653 min, major: 22.207 min. GP-7 was followed with additional changed mentioned: Allylmagnesium bromide prepared following literature procedure (J. Org. Chem. 1942, 07, 4, 326) and added dropwise to a solution of Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.) at -78 ºC over 5 minutes to give a gold solution, reaction completed after 1 h at -78 ºC and quenched with MeOH. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (76 mg, 0.247 mmol, 98 % yield) as a white crystalline solid. Physical characteristics: White crystalline solid. TLC: R f = 0.53 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.86 (dd, J = 7.4, 1.7 Hz, 2H), 7.61 – 7.56 (m, 1H), 7.51 (dd, J = 8.5, 7.0 Hz, 2H), 5.64 (ddt, J = 17.5, 10.2, 7.5 Hz, 1H), 5.23 (d, J = 10.1 Hz, 1H), 5.03 (dd, J = 17.1, 1.6 Hz, 1H), 4.40 (dd, J = 13.6, 7.5 Hz, 1H), 4.18 (s, 1H), 4.10 (dd, J = 13.6, 7.4 Hz, 1H), 3.89 (s, 1H), 1.23 (d, J = 6.8 Hz, 12H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.09, 137.39, 133.25, 129.06, 129.02, 128.45, 125.16, 124.63, 60.37, 46.98, 45.13, 21.38, 20.78 ppm. Specific rotation: [α] = -99.33 (c 1.00, CHCl3) Melting Point: 79-80 ºC HRMS: Calc’d for C 16 H 25 N 2 O 2 S + [M+H + ] 309.1632; found 309.1632. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n- hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 16.560 min, minor: 21.653 min. GP-8 was used with additional changes mentioned: 4-(4-iodophenyl)-3-phenylfuran- 2(5H)-one (60.5 mg, 0.25 mmol, 1 eq.) in 0.3 mL dry THF was added at room temperature in one portion to the stirring isopropylmagnesium chloride lithium chloride complex solution (0.38 mL, 0.5 mmol, 2 eq. 1.3 M in THF), the reaction mixture turned turbid orange and exchange takes about 2 hours. Upon complete Mg-halogen exchange, a solution of Ph-sulfonimidoyl fluoride (107.3 mg, 0.375 mmol, 1.5 eq.) in THF (0.5 mL) was added, workup procedure as described in Method 2. Purified by silica gel column chromatography using DCM/acetone (0% to 6% acetone gradient) to give the product (77.8 mg, 0.155 mmol, 62% yield) as a colorless crystalline solid. Physical characteristics: Colorless crystalline solid. TLC: Rf = 0.72 (DCM/acetone, 10% acetone). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.98 – 7.93 (m, 2H), 7.90 – 7.86 (m, 2H), 7.57 – 7.53 (m, 1H), 7.50 (dd, J = 8.3, 6.6 Hz, 2H), 7.44 – 7.40 (m, 2H), 7.36 (s, 5H), 5.13 (d, J = 3.5 Hz, 2H), 4.30 (br, 1H), 3.90 (br, 1H), 1.36 – 1.32 (m, 6H), 1.19 (t, J = 7.4 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 172.80, 158.51, 153.64, 143.53, 140.38, 134.77, 133.05, 129.50, 129.45, 129.31, 129.21, 128.97, 128.93, 128.46, 128.38, 128.17, 127.75, 70.37, 47.15, 45.38, 21.61, 20.70 ppm. Specific rotation: [α] = 8.57 (c 1.00, CHCl 3 ) Melting Point: 192-193 ºC HRMS: Calc’d for C29H31N2O4S + [M+H + ] 503.2000; found 503.2016. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n- hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 19.693 min, major: 22.627 min. GP-9 was followed with no additional change: Commercially available 4- bromoaniline (1.0 eq, 0.25 mmol) was used. NaHMDS (2.0 eq) was used as base. Purified by silica gel column chromatography using hexane/EtOAc (0% to 35% EtOAc gradient) to give the product (89 mg, 203 μmol, 81% yield) as a white solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.6 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 11.17 (s, 1H), 7.82 (dd, J = 7.8, 1.7 Hz, 2H), 7.53 – 7.46 (m, 1H), 7.42 (dd, J = 8.5, 7.1 Hz, 2H), 7.32 – 7.27 (m, 2H), 7.01 – 6.95 (m, 2H), 4.32 (s, 1H), 3.86 (s, 1H), 1.33 (d, J = 6.8 Hz, 6H), 1.15 (d, J = 6.9 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 157.73, 140.74, 136.10, 132.94, 132.38, 129.17, 126.96, 117.98, 47.36, 45.50, 21.22, 21.07, 20.95, 20.80 ppm. Specific rotation: = -128.38 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 19 H 25 BrN 3 O 2 S [M+H + ] 438.0845; found 438.0852. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n- hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 4.927 min, major: 5.447 min. GP-14 was followed with no additional change: Purified by silica gel column chromatography using hexane/acetone (0% to 50% acetone gradient) to give the product (26 mg, 84 μmol, 84% yield) as a white a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.30 (hexane/acetone, 35% acetone). 1 H NMR: (500 MHz, DMSO-d6) δ 7.93 (d, 2H), 7.62 – 7.53 (m, 3H), 7.37 – 7.26 (m, 4H), 6.93 (d, J = 8.2 Hz, 2H) ppm. 13 C NMR: (126 MHz, DMSO-d 6 ) δ 144.87, 143.68, 131.86, 131.41, 128.88, 126.43, 124.84, 112.22 ppm. Specific rotation: = +262.22 (c 0.5, CHCl 3 ) HRMS: Calc’d for C 12 H 12 N 2 OS [M+H + ] 310.9848; found 310.9848. ee> 99% HPLC Conditions: Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 6.193 min, major: 6.600 min. Specific rotation: = +262.22 (c 0.5, CHCl 3 ) HRMS: Calc’d for C 12 H 12 N 2 OS [M+H + ] 310.9848; found 310.9848. Enantiomeric excess: > 99% ee HPLC Conditions: Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 6.193 min, major: 6.600 min. GP-9 was followed with no additional change: Commercially available 3- aminobenzonitrile (1.0 eq., 0.25 mmol) was used. NaHMDS (2.0 eq) was used as base. Purified by silica gel column chromatography using hexane/EtOAc (0% to 30% EtOAc gradient) to give the product (83 mg, 216 μmol, 86% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.28 (hexane/EtOAc, 25% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.85 (dd, J = 7.5, 1.8 Hz, 2H), 7.53 (dd, J = 8.4, 6.4 Hz, 1H), 7.46 (t, J = 7.7 Hz, 2H), 7.37 (d, J = 2.2 Hz, 1H), 7.34 – 7.26 (m, 3H), 4.31 (s, 1H), 3.85 (s, 1H), 1.33 (d, J = 6.9 Hz, 6H), 1.15 (d, J = 6.6 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 157.54, 140.54, 138.29, 133.22, 130.25, 129.35, 127.96, 126.91, 125.36, 123.90, 118.23, 113.35, 47.42, 45.57, 21.14, 21.02, 20.88, 20.75 ppm. Specific rotation: [α] = -153.17 (c 1.00, CHCl3) HRMS: Calc’d for C20H25N4O2S [M+H + ] 385.1693; found 385.1690. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 8.700 min, major: 9.327 min. GP-9 was followed with no additional change: Commercially available 2- (benzyloxy)aniline (1.0 eq) was used. NaHMDS (2.0 eq) was used as base. Purified by silica gel column chromatography using hexane/EtOAc (0% to 20% EtOAc gradient) to give the product (104 mg, 223 μmol, 89% yield) as a colorless oil, which solidified to a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.36 (hexane/EtOAc, 20% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 11.16 (s, 1H), 7.82 (dd, J = 7.8, 1.6 Hz, 2H), 7.60 – 7.53 (m, 2H), 7.46 (dd, J = 8.4, 1.6 Hz, 1H), 7.44 – 7.35 (m, 3H), 7.35 – 7.27 (m, 3H), 6.96 (td, J = 7.8, 1.6 Hz, 1H), 6.82 (t, J = 7.4 Hz, 2H), 5.10 (d, J = 12.1 Hz, 1H), 4.98 (d, J = 12.2 Hz, 1H), 4.40 (s, 1H), 3.79 (s, 1H), 1.36 (dd, J = 7.0, 3.6 Hz, 6H), 1.14 (dd, J = 21.3, 6.8 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 157.40, 149.10, 141.41, 136.62, 132.40, 128.76, 128.58, 127.80, 127.04, 126.93, 126.79, 125.02, 122.12, 121.26, 112.33, 70.38, 47.44, 45.31, 21.24, 21.07, 21.04, 20.88 ppm. Specific rotation: [α] = +6.49 (c 1.00, CHCl3) HRMS: Calc’d for C26H32N3O3S [M+H + ] 466.2159; found 466.2154. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n- hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 6.333 min, major: 7.067 min.
GP-9 was followed with no additional change: Commercially available 3-fluoro-4- methylaniline (1.0 eq, 0.2 mmol) was used. NaHMDS (2.0 eq) was used as base. Purified by silica gel column chromatography using hexane/EtOAc (0% to 20% EtOAc gradient) to give the product (68 mg, 174 μmol, 69% yield) as a colorless oil. Physical characteristics: Colorless oil. TLC: Rf = 0.36 (hexane/EtOAc, 20% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.83 (dd, J = 7.6, 1.8 Hz, 2H), 7.49 (t, J = 7.4 Hz, 1H), 7.42 (t, J = 7.7 Hz, 2H), 6.96 (t, J = 8.3 Hz, 1H), 6.82 (dd, J = 10.8, 2.2 Hz, 1H), 6.75 (dd, J = 8.1, 2.2 Hz, 1H), 4.32 (s, 1H), 3.98 – 3.77 (m, 1H), 2.13 (s, 3H), 1.33 (d, J = 6.9 Hz, 6H), 1.15 (d, J = 6.9 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 162.29, 160.34, 157.86, 140.92, 135.96 (d, J = 10.2 Hz), 132.93, 131.89 (d, J = 6.3 Hz), 129.19, 127.08, 121.41 (d, J = 17.4 Hz), 117.39 (d, J = 3.4 Hz), 109.12 (d, J = 25.8 Hz), 47.41, 45.56, 21.30, 21.16, 21.04, 20.90, 14.21 (d, J = 3.2 Hz) ppm. 19 F NMR: (471 MHz, CDCl3) δ -115.20 ppm. Specific rotation: = -135.45 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 20 H 27 FN 3 O 2 S [M+H + ] 392.1803; found 392.1803. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 5.120 min, major: 5.620 min. GP-9 was followed with additional changes mentioned: Commercially available 2- chloropyridin-4-amine (1.0 eq, 0.2 mmol) and NaHMDS (2.0 eq) were used. The reaction was quenched after stirring at room temperature for 1.5 hours. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (71 mg, 0.180 mmol, 90% yield) as a clear colorless oil. Physical characteristics: Clear colorless oil. TLC: R f = 0.36 (hexane/EtOAc, 40% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 12.54 (s, 1H), 8.10 (d, J = 5.6 Hz, 1H), 7.94 – 7.89 (m, 2H), 7.61 – 7.55 (m, 1H), 7.53 – 7.48 (m, 2H), 7.03 (d, J = 2.0 Hz, 1H), 6.91 (dd, J = 5.6, 2.0 Hz, 1H), 4.30 (s, 1H), 3.84 (s, 1H), 1.33 (d, J = 3.8 Hz, 6H), 1.14 (d, J = 3.5 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 157.1, 152.3, 150.2, 147.0, 140.3, 133.4, 129.4, 126.8, 113.0, 112.3, 47.4, 45.6, 21.0, 20.9, 20.8, 20.6 ppm. Specific rotation: = - 65.23 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 18 H 23 ClN 4 O 2 SNa [M+Na + ] 417.1122; found 417.1122. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL/min, 25 °C, UV detection wavelength: 254 nm, retention time: minor: 6.97 min, major: 12.84 min. GP-9 was followed with additional changes mentioned: Commercially available 6- chloro-2-(methylthio)pyrimidin-4-amine (1.0 eq, 0.20 mmol) and NaHMDS (2.0 eq) were used. The reaction was quenched after stirring at room temperature for 1.5 hours. Purified by silica gel column chromatography using hexane/EtOAc (0% to 60% EtOAc gradient) to give the product (76 mg, 0.172 mmol, 86% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.41 (hexane/EtOAc, 40% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 9.06 (s, 0H), 8.00 – 7.95 (m, 2H), 7.60 – 7.57 (m, 1H), 7.54 – 7.50 (m, 2H), 6.59 (s, 1H), 4.39 – 4.16 (m, 1H), 4.00 – 3.78 (m, 1H), 2.36 (s, 3H), 1.35 – 1.12 (m, 12H) ppm. 13 C NMR: 13 C NMR (126 MHz, CDCl3) δ 171.49, 164.17, 160.33, 140.98, 133.39, 129.29, 128.97, 127.07, 107.77, 47.39, 20.89, 20.82, 19.30, 14.07 ppm. Specific rotation: [α] = -4.62 (c 1.00, CHCl3) HRMS: Calc’d for C 16 H 24 ClN 5 O 2 S 2 Na [M+Na + ] 464.0952; found 464.0957. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL/min, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 5.42 min, major: 8.53 min. GP-11 (LiBr) was followed with no addition change: Commercially available tert- butyl 3-aminoazetidine-1-carboxylate (1.0 eq. 0.1 mmol) was used. Heated the reaction at 60 ºC for 13 hours. Purified by silica gel column chromatography using hexane/EtOAc (0% to 60% EtOAc gradient) to give the product (34.6 mg, 78.9 μmol, 79% yield) as a clear colorless oil. Physical characteristics: Clear colorless oil. TLC: R f = 0.41 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 8.79 (d, J = 8.8 Hz, 1H), 7.92 – 7.87 (m, 2H), 7.61 – 7.55 (m, 1H), 7.53 – 7.48 (m, 2H), 4.37 – 4.19 (m, 1H), 4.20 – 4.13 (m, 1H), 4.08 – 4.00 (m, 1H), 3.95 (dd, J = 9.1, 5.6 Hz, 1H), 3.91 – 3.79 (m, 1H), 3.78 – 3.72 (m, 1H), 3.54 (dd, J = 9.3, 5.7 Hz, 1H), 1.39 (s, 9H), 1.31 (d, J = 6.8 Hz, 6H), 1.15 (d, J = 6.9 Hz, 6H) ppm. 13 C NMR: 13 C NMR (126 MHz, CDCl3) δ 157.9, 155.8, 141.0, 133.0, 129.2, 126.9, 79.9, 57.4, 47.2, 45.3, 41.5, 28.3, 21.1, 21.0, 20.8, 20.8 ppm. Specific rotation: [α] = -26.86 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 21 H 34 N 4 O 4 SNa [M+Na + ] 461.2193; found 461.2195. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n- hexane:i-PrOH, flow rate: 1 mL/min, 25 °C, UV detection wavelength: 254 nm, retention time: minor: 10.09 min, major: 12.91 min. GP-11 (LiBr) was followed with no additional change: 1-(hex-5-yn-1-yl)piperazine (1.1 eq.0.220 mmol) was used (prepared from the procedure below). Heated the reaction at 70 ºC for 13 hours. Purified by silica gel column chromatography using hexane/EtOAc (0% to 60% EtOAc gradient) to give the product (85 mg, 0.196 mmol, 98% yield) as a clear light-yellow oil. Physical characteristics: Clear light-yellow oil. TLC: Rf = 0.2 (hexane/EtOAc, 60% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.84 – 7.79 (m, 2H), 7.58 – 7.48 (m, 3H), 4.23 (s, 1H), 3.88 (s, 1H), 3.20 – 3.06 (m, 4H), 2.56 – 2.47 (m, 4H), 2.34 (t, J = 7.0 Hz, 2H), 2.17 (td, J = 6.8, 2.6 Hz, 2H), 1.92 (t, J = 2.6 Hz, 1H), 1.59 – 1.44 (m, 4H), 1.30 – 1.20 (m, 12H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 157.20, 136.73, 132.47, 128.98, 127.59, 84.16, 68.52, 57.48, 52.33, 47.11, 45.80, 45.14, 26.20, 25.77, 21.51, 20.77, 18.27 ppm. Specific rotation: [α] = -37.98 (c 1.00, CHCl3) HRMS: Calc’d for C23H37N4O2S [M+H + ] 433.2632; 433.2636. Enantiomeric excess: Unable to separate enantiomers. Step 1: In a 200 mL round-bottomed flask equipped with a stir bar was tert-butyl piperazine-1-carboxylate (2.55 g, 21.9 mmol, 1 eq.) in DMF (60 mL, 0.36 M). 6-chlorohex- 1-yne (4.48 g, 24.1 mmol, 1.1 eq.) and Et 3 N (3.66 mL, 26.3 mmol, 1.2 eq.) were added then the reaction vessel was capped with a septum and heated to 70 ºC for 21 hours. The reaction mixture was cooled to room temperature and DMF was removed under vacuum to give a crude residue that was taken up in EtOAc (100 mL) and half saturated aqueous NaCl (150 mL). The aqueous layer was extracted with EtOAc (100 mL x 3), combined organic layers were dried over Na2SO4, filtered and concentrated. Further purification by silica gel column chromatography using DCM/MeOH (0% to 3% MeOH gradient) gave tert-butyl 4-(hex-5- yn-1-yl)piperazine-1-carboxylate (2.49 g, 9.35 mmol, 43% yield) as a colorless foam that was used in the next step. Physical characteristics: Colorless foam. TLC: Rf = 0.38 (DCM/MeOH, 5% MeOH). 1 H NMR: (500 MHz, CDCl3) δ 3.55 – 3.39 (m, 4H), 2.54 – 2.36 (m, 6H), 2.22 (td, J = 6.9, 2.6 Hz, 2H), 1.94 (t, J = 2.6 Hz, 1H), 1.69 – 1.61 (m, 2H), 1.58 – 1.52 (m, 2H), 1.45 (s, 9H). 1 3 C NMR: (126 MHz, CDCl3) δ 154.68, 84.14, 79.75, 68.59, 57.95, 52.90, 42.85, 28.42, 26.26, 25.47, 18.28. HRMS: Calc’d for C 15 H 27 N 2 O 2 [M+H + ] 267.2067; found 267.2063. Step 2: In a 100 mL septum capped round-bottomed flask equipped with a stir bar and argon balloon was tert-butyl 4-(hex-5-yn-1-yl)piperazine-1-carboxylate (2.49 g, 9.35 mmol, 1 eq.) in DCM (9.4 mL, 1.0 M) was added TFA (9.37 mL, 122 mmol, 13 eq.) at room temperature. The reaction mixture stirred at room temperature for 3 hours at which time the solvents were removed under reduced pressure to give a crude oil that was taken up in DCM (250 mL), washed with saturated Na2CO3 (100 mL x 3), dried over Na2SO4, filtered and concentrated to give 1-(hex-5-yn-1-yl)piperazine (1.48 g, 8.90 mmol, 95% yield) as an off- white amorphous solid that was used without further purification. Physical characteristics: Off-white amorphous solid. TLC: R f = 0.18 (DCM/MeOH, 5% MeOH). 1 H NMR: (500 MHz, CDCl 3 ) δ 2.88 (t, J = 4.8 Hz, 4H), 2.50 – 2.34 (m, 4H), 2.33 – 2.28 (m, 2H), 2.19 (td, J = 6.8, 2.6 Hz, 2H), 2.13 (s, 1H), 1.92 (t, J = 2.5 Hz, 1H), 1.64 – 1.49 (m, 4H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 84.34, 68.40, 58.64, 54.44, 46.01, 26.45, 25.71, 18.35. ’ 167.1543; found 167.1538. GP-9 (NaHMDS) was followed with no additional change: Commercially available tert-butyl 2,7-diazaspiro[4.4]nonane-2-carboxylate (1.0 eq, 0.2 mmol) and NaHMDS (1.0 eq) were used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give an inseparable mixture of diastereomers (92 mg, 187 mmol, 93% yield) as a colorless foam. Physical characteristics: Colorless foam TLC: Rf = 0.58 (hexane/EtOAc, 60% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.89 (d, J = 6.9 Hz, 2H), 7.61 – 7.49 (m, 3H), 4.31 – 4.06 (m, 1H), 4.03 – 3.76 (m, 1H), 3.60 – 3.41 (m, 1H), 3.39 – 2.98 (m, 7H), 1.89 – 1.75 (m, 3H), 1.69 – 1.63 (m, 1H), 1.42 (s, 9H), 1.30 – 1.21 (m, 12H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 157.46, 154.43, 138.54, 132.52, 129.09, 127.10, 79.50, 56.22, 56.12, 54.80, 54.17, 49.00, 48.12, 47.20, 47.08, 45.12, 45.04, 44.67, 35.08, 34.94, 34.84, 34.27, 28.48, 21.47, 20.78 ppm. Note: The spirocyclic amine nucleophile used was racemic. HRMS: Calc’d for C 25 H 41 N 4 O 4 S [M+H + ] 493.2843; found 493.2849. GP-11 (NaI) was followed with addition changes mentioned: Commercially 2-oxa- 6-azaspiro[3.3]heptane oxalate (1.0 eq., 0.1 mmol) was used. The equivalents of Et 3 N were increased from 2 to 6 equivalents and the reaction was heated to 60 ºC for 24 hours; no further modifications were made. Purified by silica gel column chromatography using hexane/EtOAc (0% to 40% EtOAc gradient) to give the product (30 mg, 82 μmol, 82% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.32 (hexane/EtOAc, 60% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.90 – 7.85 (m, 2H), 7.61 – 7.56 (m, 1H), 7.54 – 7.49 (m, 2H), 4.71 (d, J = 7.2 Hz, 2H), 4.67 (d, J = 7.2 Hz, 2H), 4.18 (d, J = 8.4 Hz, 2H), 4.13 (s, 1H), 3.98 (d, J = 8.4 Hz, 2H), 3.93 (s, 1H), 1.29 – 1.20 (m, 12H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 157.74, 137.97, 132.83, 129.07, 127.57, 80.88, 59.73, 47.03, 45.20, 37.36, 21.46, 20.75 ppm. Specific rotation: = -5.21 (c 0.90, CHCl3) HRMS: Calc’d for C18H27N3O3S [M+Na + ] 388.1665; found 388.1666. Enantiomeric excess: > 99% ee. Note: When LiBr was used, 98% ee was obtained HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL/min, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 31.32 min, major: 53.79 min. GP-11 (LiBr) was followed with no additional change: Commercially available sarafloxacin HCl salt was used to prepare the methyl ester analog of sarafloxacin, 4 which was used as the secondary amine nucleophile (1 eq., 0.1 mmol). The reaction was heated to 70 ºC for 10 hours. Purified by silica gel column chromatography using hexanes/acetone (0% to 50% acetone gradient) to give the product (54 mg, 81.1 μmol, 81% yield) as a light- yellow oil. Physical characteristics: Light-yellow oil. TLC: R f = 0.48 (hexanes/acetone, 50% acetone). 1 H NMR: (500 MHz, CDCl3) δ 8.39 (s, 1H), 8.03 (d, J = 12.9 Hz, 1H), 7.87 – 7.82 (m, 2H), 7.61 – 7.57 (m, 1H), 7.56 – 7.51 (m, 2H), 7.44 – 7.39 (m, 2H), 7.33 (t, J = 8.3 Hz, 2H), 6.23 (d, J = 6.9 Hz, 1H), 4.28 – 4.12 (m, 1H), 3.97 – 3.82 (m, 4H), 3.24 (dd, J = 6.5, 3.5 Hz, 4H), 3.09 (dd, J = 6.4, 3.7 Hz, 4H), 1.31 – 1.18 (m, 12H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 173.00 (d, J = 2.1 Hz), 166.09, 164.06, 162.05, 156.78, 154.29, 152.31, 148.55, 144.13 (d, J = 10.8 Hz), 138.06, 136.97, 136.51 (d, J = 3.5 Hz), 132.77, 129.28 (d, J = 9.0 Hz), 129.13, 127.37, 123.33 (d, J = 7.0 Hz), 117.80 (d, J = 23.2 Hz), 113.37 (d, J = 23.2 Hz), 110.69, 106.23 (d, J = 2.7 Hz), 52.20, 49.30 (d, J = 4.1 Hz), 47.18, 45.64, 45.27, 21.50, 20.75, 20.68 ppm. 19 F NMR: (471 MHz, CDCl 3 ) δ -108.84, -123.42 ppm. HRMS: Calc’d for C34H38F2N5O5S [M+H + ] 666.2556; found 666.2560. Enantiomeric excess: Unable to separate enantiomers. GP-11 (LiBr) was followed with additional changes mentioned: Ph-sulfonimidoyl fluoride (1.1 eq., 0.11 mmol) was used. Commercially available rac-amlodipine (1 eq., 0.1 mmol) was used. The reaction was heated at 70 ºC for 13 hours. Purified by silica gel column chromatography using hexane/EtOAc (0% to 35% EtOAc gradient) to give an inseparable mixture of diastereomers (47 mg, 69.6 μmol, 70% yield) as a light-yellow oil. Physical characteristic: Light-yellow oil. TLC: R f = 0.38 (hexane/EtOAc, 40% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 8.91 – 8.75 (m, 1H), 7.94 (d, J = 7.9 Hz, 2H), 7.61 – 7.55 (m, 1H), 7.54 – 7.39 (m, 4H), 7.22 (d, J = 7.9 Hz, 1H), 7.14 (q, J = 7.5 Hz, 1H), 7.04 (t, J = 7.6 Hz, 1H), 5.41 (d, J = 2.1 Hz, 1H), 4.79 – 4.59 (m, 2H), 4.32 – 4.10 (m, 1H), 4.09 – 3.98 (m, 2H), 3.98 – 3.79 (m, 1H), 3.73 – 3.64 (m, 1H), 3.62 (s, 3H), 3.58 – 3.51 (m, 1H), 3.35 – 3.23 (m, 1H), 3.13 – 3.03 (m, 1H), 2.43 (d, J = 2.6 Hz, 3H), 1.27 (s, 6H), 1.21 – 1.12 (m, 9H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 168.15, 167.25, 158.13, 158.09, 146.06, 146.03, 145.20, 145.16, 145.01, 144.93, 140.85, 140.79, 132.70, 132.69, 132.26, 132.17, 131.54, 131.51, 129.16, 129.13, 129.11, 127.31, 127.29, 127.00, 126.91, 103.70, 103.68, 101.64, 101.56, 69.56, 69.49, 67.98, 67.93, 59.79, 59.78, 50.74, 46.92, 45.27, 41.86, 37.04, 36.90, 29.72, 21.19, 21.12, 20.72, 19.35, 19.32, 14.29 ppm. Note: The primary amine nucleophile used was racemic. HRMS: Calc’d for C33H44ClN4O7S [M+H + ] 675.2614; found 675.2611.
GP-9 was followed with additional changed mentioned: Reaction scale changed to 0.20 mmol. Commercially available benzyl (2S)-2-{8-amino-1-bromoimidazo[1,5- a]pyrazin-3-yl}pyrrolidine-1-carboxylate (0.20 mmol, 1.0 eq) and NaHMDS (2.0 eq) were used. Purified by silica gel column chromatography using hexane/acetone (0% to 45% acetone gradient) to give the product (110 mg, 161 μmol, 80% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.30 (hexane/acetone, 30% acetone). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.83 (dd, J = 7.6, 1.8 Hz, 2H), 7.49 (t, J = 7.4 Hz, 1H), 7.42 (t, J = 7.7 Hz, 2H), 6.96 (t, J = 8.3 Hz, 1H), 6.82 (dd, J = 10.8, 2.2 Hz, 1H), 6.75 (dd, J = 8.1, 2.2 Hz, 1H), 4.32 (s, 1H), 3.98 – 3.77 (m, 1H), 2.13 (s, 3H), 1.33 (d, J = 6.9 Hz, 6H), 1.15 (d, J = 6.9 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 162.29, 160.34, 157.86, 140.92, 135.96 (d, J = 10.2 Hz), 132.93, 131.89 (d, J = 6.3 Hz), 129.19, 127.08, 121.41 (d, J = 17.4 Hz), 117.39 (d, J = 3.4 Hz), 109.12 (d, J = 25.8 Hz), 47.41, 45.56, 21.30, 21.16, 21.04, 20.90, 14.21 (d, J = 3.2 Hz) ppm. Specific rotation: [α] = -19.56 (c 1.00, CHCl3 ) HRMS: Calc’d for C 31 H 37 BrN 7 O 4 S [M+H + ] 682.1806; found 682.1810 Diastereomeric Excess: > 99 de, determined by 1 HNMR.
GP-9 was followed with no additional change: Commercially available (2R,3R,4R,5R)-2-(4-aminopyrrolo[2,1-f][1,2,4]triazin-7-yl)-3 ,4-bis(benzyloxy)-5- ((benzyloxy)methyl)tetrahydrofuran-2-carbonitrile (0.1 mmol, 1 eq.) and NaHMDS (2.0 eq) were used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 35% EtOAc gradient) to give the product (66 mg, 79.7 μmol, 80% yield) as a light-yellow amorphous solid. Physical characteristics: light-yellow amorphous solid. TLC: Rf = 0.67 (hexane/EtOAc, 40% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 8.15 (d, J = 7.6 Hz, 2H), 7.63 – 7.53 (m, 3H), 7.49 (s, 1H), 7.33 – 7.23 (m, 15H), 6.92 – 6.84 (m, 2H), 4.84 (s, 2H), 4.65 (d, J = 4.9 Hz, 1H), 4.57 – 4.46 (m, 4H), 4.37 (d, J = 12.0 Hz, 1H), 4.23 (s, 1H), 4.02 (t, J = 5.8 Hz, 1H), 3.93 (s, 1H), 3.76 (dd, J = 11.0, 3.5 Hz, 1H), 3.60 (dd, J = 11.0, 3.9 Hz, 1H), 1.34 (dd, J = 12.3, 6.8 Hz, 6H), 1.26 – 1.18 (m, 6H) ppm. Specific rotation: [α] = +62.96 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 48 H 50 N 7 O 6 S [M+H + ] 828.3538; found 828.3529. Diastereomeric excess: > 99% de (determined by 1 H NMR) GP-10 was followed with no additional change: Commercially available NH4Cl (3.0 eq) was used as a nitrogen source. i-PrMgCl-LiCl (6.0 eq) was used as base. NH 4 Cl and i- PrMgClLiCl were mixed at room temperature in THF (2.5 mL) and stirred the mixture for 30 min, Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.) in THF (0.5 mL) was added to the reaction slowly. Purified by silica gel column chromatography using hexane/EtOAc (0% to 60% EtOAc gradient) to give the product (58 mg, 204 μmol, 82% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.3 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.95 (dd, J = 7.5, 1.7 Hz, 2H), 7.58 – 7.52 (m, 1H), 7.49 (dd, J = 8.4, 6.7 Hz, 2H), 6.50 (s, 2H), 4.29 (s, 1H), 3.81 (s, 1H), 1.29 – 1.15 (m, 12H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 158.34, 143.27, 132.66, 129.07, 126.36, 47.23, 45.21, 21.26, 21.17, 20.91 ppm. Specific rotation: [α] = -24.24 (c 1.00, CHCl3) HRMS: Calc’d for C 13 H 22 N 3 O 2 S [M+H + ] 284.1427; found 284.1427. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 7.673 min, minor: 8.6734 min. GP-10 was followed with no additional change: Commercially available 15 NH4Br (3.0 eq) was used as a nitrogen source. i-PrMgCl-LiCl (6.0 eq) was used as base. 15 NH 4 Br and i-PrMgClLiCl were mixed at room temperature in THF (2.5 mL) and stirred the mixture for 30 min, Ph-sulfonimidoyl fluoride (0.25 mmol, 1 eq.) in THF (0.5 mL) was added to the reaction slowly. Purified by silica gel column chromatography using hexane/EtOAc (0% to 60% EtOAc gradient) to give the product (58 mg, 204 μmol, 82% yield) as a white solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.3 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.99 – 7.90 (m, 2H), 7.54 (t, J = 4.6 Hz, 1H), 7.48 (td, J = 7.9, 7.5, 2.2 Hz, 2H), 6.53 (d, J = 53.6 Hz, 2H), 4.28 (s, 1H), 3.80 (s, 1H), 1.21 (dd, J = 32.2, 7.5 Hz, 12H). ppm. 13 C NMR: (126 MHz, CDCl3) δ 158.34, 143.27, 132.66, 129.07, 126.36, 47.26, 45.21, 21.26, 21.17, 20.91 ppm. Specific rotation: -22.10 (c 1.00, CHCl3) HRMS: Calc’d for C13H22N2 15 NO2S [M+H + ] 285.1398; found 285.1398. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n- hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 7.387 min, major: 8.340 min. GP-12 was followed with no additional change: Commercially available piperidine (1.0 eq) was used. i-PrMgCl-LiCl (1.1 eq) was used as base. i-PrMgCl-LiCl was added to a solution of piperidine in THF (2.5 mL) under -20 °C and stirred the mixture for 30 min, Ph- sulfonimidoyl fluoride (0.25 mmol, 1 eq.) in THF (0.5 mL) was added to the reaction slowly. Purified by silica gel column chromatography using hexane/EtOAc (0% to 60% EtOAc gradient) to give the product (76 mg, 216 μmol, 86% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.3 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.85 (dd, J = 7.2, 1.8 Hz, 2H), 7.58 – 7.52 (m, 1H), 7.50 (dd, J = 8.3, 6.5 Hz, 2H), 4.21 (s, 1H), 3.92 (s, 1H), 3.20 – 2.99 (m, 4H), 1.61 (p, J = 5.6 Hz, 4H), 1.50 – 1.40 (m, 2H), 1.34 – 1.18 (m, 12H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 157.63, 138.36, 132.33, 128.95, 127.56, 46.99, 46.70, 45.19, 25.47, 23.82, 21.63, 20.91, 20.86 ppm. Specific rotation: = -26.24 (c 1.00, CHCl3) HRMS: Calc’d for C18H30N3O2S [M+H + ] 352.2053; found 352.2047. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IA column, 98:02 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 10.77 min, major: 11.88 min. GP-13 was followed with no additional change: Purified by silica gel column chromatography using hexane/acetone (0% to 50% acetone gradient) to give the product (20.5 mg, 91.3μmol, 91% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.28 (hexane/acetone, 50% acetone). 1 H NMR: (500 MHz, CDCl3) δ 7.91 – 7.84 (m, 2H), 7.58 – 7.53 (m, 1H), 7.53 – 7.48 (m, 2H), 2.98 (t, J = 5.5 Hz, 4H), 2.44 (s, 1H), 1.68 – 1.55 (m, 4H), 1.42 – 1.29 (m, 2H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 136.35, 132.27, 128.79, 128.09, 48.06, 25.77, 23.75 ppm. Specific rotation: = +28.98 (c 1.00, CHCl3) HRMS: Calc’d for C 11 H 17 N 2 OS [M+H + ] 225.1056; found 225.1056. Enantiomeric excess: > 99% ee. HPLC Conditions: Chiralpak IB column, 95:05 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 27.053 min, major: 29.040 min.
GP-12 was followed with no additional change: Commercially available MeMgCl (3.0 M in THF, used without titration, 0.5 mmol, 2.0 eq) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (100 mg, 197 μmol, 79% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.38 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.93 (d, J = 8.7 Hz, 2H), 7.53 (d, J = 8.7 Hz, 2H), 7.18 (d, J = 8.0 Hz, 2H), 7.13 (d, J = 8.2 Hz, 2H), 6.74 (s, 1H), 4.44 – 3.67 (m, 2H), 3.33 (s, 3H), 2.38 (s, 3H), 1.24 (t, J = 6.4 Hz, 12H). ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 158.87, 145.37, 144.29 (q, J = 38.5 Hz), 143.09, 140.02, 139.94, 129.91, 128.87, 128.46, 125.83, 125.69, 121.15 (q, J = 269.2 Hz), 106.56 (d, J = 2.0 Hz), 45.01, 21.44, 21.16 ppm. 19 F NMR: (471 MHz, CDCl 3 ) δ -62.49.ppm. Specific rotation: = -18.22 (c 1.00, CHCl 3 ) HRMS: Calc’d for C 25 H 29 F 3 N 4 NaO 2 S [M+Na + ] 529.1856; found 529.1854. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i- PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 12.940 min, minor: 22.473 min. GP-12 was followed with no additional change: Commercially available 3- aminobenzonitrile (0.25 mmol, 1.0 eq) was used. NaHMDS (2.0 eq) was used as base. Purified by silica gel column chromatography using hexane/EtOAc (0% to 30% EtOAc gradient) to give the product (115 mg, 189 μmol, 75% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.4 (hexane/EtOAc, 35% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.83 (d, J = 8.7 Hz, 2H), 7.43 – 7.37 (m, 3H), 7.37 – 7.29 (m, 3H), 7.12 (d, J = 7.9 Hz, 2H), 7.04 – 6.98 (m, 2H), 6.71 (s, 1H), 4.31 (s, 1H), 3.86 (s, 1H), 2.38 (s, 3H), 1.32 (t, J = 5.8 Hz, 6H), 1.16 (d, J = 6.8 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 157.36, 145.38, 144.32 (q, J = 38.6 Hz), 142.74, 140.05, 139.91, 138.07, 130.42, 129.80, 128.78, 128.23, 127.90, 125.70, 125.48, 124.02, 121.10 (q, J = 269.1 Hz), 118.09, 113.56, 106.46 (d, J = 2.3 Hz), 47.51, 45.71, 21.44, 20.94 (dd, J = 39.0, 20.4 Hz) ppm. 19 F NMR: (471 MHz, CDCl3) δ -62.52.ppm. Specific rotation: = - 171.85 (c 1.00, CHCl3) HRMS: Calc’d for C31H32N6O2S [M+H + ] 609.2254; found 609.2254. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IA column, 90:10 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 11.987 min, major: 16.800 min. Applying the chiral bifuntional t-BuSF sulfonimidoyl transfer reagent to pharmaceutically relevant targets and intermediates. Asymmetric synthesis of a Celebrex sulfoximine analog. The requisite tert-butyl sulfoximine was prepared as described above using GP-1 on a gram-scale (1.54 g, 2.81 mmol, 70% yield, > 99% ee). The one-pot chiral sulfoximine synthesis was employed using GP-12 to prepare urea protected chiral methyl sulfoximine analog of Celebrex (220 mg, 0.431 mmol, 79% yield, > 99% ee). Deprotection using GP-13 was followed with no additional changes. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (33 mg, 87 μmol, 87% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.28 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.99 (d, J = 8.7 Hz, 2H), 7.50 (d, J = 8.7 Hz, 2H), 7.17 (d, J = 7.9 Hz, 2H), 7.11 (d, J = 8.3 Hz, 2H), 6.74 (s, 1H), 3.14 (s, 3H), 3.02 (s, 1H), 2.37 (s, 3H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 145.37, 144.26 (q, J = 38.5 Hz), 143.19, 142.40, 139.94, 129.88, 128.95, 128.82, 125.76, 125.73, 121.11 (q, J = 269.2 Hz), 106.53 (d, J = 2.1 Hz), 46.19, 21.44 ppm. 19 F NMR: (471 MHz, CDCl3) δ -65.50ppm. Specific rotation: +42.33 (c 1.00, CHCl3) HRMS: Calc’d for C18H17N3OS [M+H + ] 380.1039; found 380.1039. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 21.587 min, major: 31.287 min. Asymmetric formal synthesis of Pfizer’s PYK2 inhibitor. N,N-diisopropyl urea protected tert-butyl 4-chlorophenyl sulfoximine (552 mg, 1.54 mmol) with > 99% ee was obtained by recrystallization of 95% ee material and > 90% recovery. GP-14 was applied for the recrystallization using hexanes/EtOAc as a solvent system. GP-6 was followed for the fluorination with an increased reaction time of step 1 (t- BuOK, THF, 80 ºC) from 2 to 3 hours. Purified by silica gel column chromatography using hexane/EtOAc (0% to 20% EtOAc gradient) to give the product (380 mg, 1.18 mmol, 76% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.43 (hexane/EtOAc, 20% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 8.04 – 7.98 (m, 2H), 7.62 – 7.56 (m, 2H), 4.15 (s, 1H), 3.83 (s, 1H), 1.32 (dd, J = 6.8, 3.8 Hz, 6H), 1.22 (dd, J = 6.9, 5.2 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 153.06 (d, J = 3.0 Hz), 141.94, 133.94 (d, J = 24.1 Hz), 129.97, 129.26, 48.41, 46.02, 21.30, 20.60, 20.55 ppm. 19 F NMR: (471 MHz, CDCl3) δ 69.70 ppm. Specific rotation: = +14.43 (c 1.00, CHCl3) HRMS: Calc’d for C13H19ClFN2O2S [M+H + ] 321.0834; found 321.0829. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 12.980 min, major: 15.033 min. GP-7 was followed on a larger scale: N,N-diisopropyl urea protected sulfonimidoyl fluoride (321mg, 1.0 mmol, 1.0 eq) was used with commercially available MeMgCl (0.367 mL, 1.1 eq, 3.0 M in THF, used without titration). Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (310 mg, 0.978 mmol, 97% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.15 (hexane/EtOAc, 30% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.91 – 7.87 (m, 2H), 7.56 – 7.52 (m, 2H), 4.04 (s, 2H), 3.31 (s, 3H), 1.24 (dd, J = 6.9, 2.7 Hz, 12H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 158.92, 139.94, 139.22, 129.89, 128.86, 45.11, 21.20 ppm. Specific rotation: = - 13.14 (c 1.00, CHCl3) HRMS: Calc’d for C14H22ClN2O2S [M+H + ] 317.1805; found 317.1801. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 14.447 min, major: 26.527 min. Used modified conditions from the reported method (Org. Lett. 2015, 17, 5934−5937). To a flame dried sealed tube with magnetic stir bar, added N,N-diisopropyl urea protected 4-chlrophenyl methyl sulfoximine (158 mg, 0.5 mmol, 1 eq.), CuI (9.5 mg, 10 mol%), ligand prepared from above reference (16.2 mg, 10 mol%) and K3PO4 (117 mg, 1.1 eq). The flask was evacuated and back filled with argon three times then anhydrous DMSO (0.5 mL, 1.0 M) was added to the mixture, followed by aqueous ammonia solution (133 μL, 2.0 eq, 30% w/w). The reaction tube was tightly sealed and heated to 115 °C in oil bath (blast shield was placed in front of the reaction). After 24 hours, the reaction was cooled to room temperature then diluted with EtOAc and brine, extracted with EtOAc (15 mL x 3). Combined organic layers were washed with water (10 mL x 3) and brine (10 mL x 3), dried over Na 2 SO 4 , filtered and concentrated. Further purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (97 mg, 0.326 mmol, 65% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.16 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, DMSO-d 6 ) δ 7.49 (d, 2H), 6.69 – 6.61 (m, 2H), 6.05 (s, 2H), 4.18 (s, 1H), 3.91 – 3.55 (m, 1H), 3.25 (s, 3H), 1.15 (dd, J = 7.0, 3.7 Hz, 12H) ppm. 13 C NMR: (126 MHz, DMSO-d 6 ) δ 158.48, 153.24, 128.76, 124.23, 112.87, 46.23, 44.69, 43.96, 21.10, 20.82 ppm. Specific rotation: [α] = -21.01 (c 1.00, CHCl 3 ) HRMS: Calc’d for C14H24N3O2S [M+H + ] 298.1584; found 289.1573. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 18.167 min, minor: 31.040 min. Asymmetric formal synthesis of an allosteric dopamine D1 receptor agonist. General Suzuki coupling conditions were used. To a flame dried round bottom flask with magnetic stir bar and under argon, N,N-diisopropyl urea protected 4-Cl-phenyl methyl sulfoximine (95mg, 0.3 mmol, 1 eq.), commercially available 2-Hydroxyphenylboronic acid (62 mg, 1.5 eq), PdCl2(PPh3)2 (10.5 mg, 10%) and Na2CO3 (95.4 mg, 3.0 eq) were added. Then dissolved the mixture with degassed dioxane/H2O (2:1) solution. Heated to 100 °C and stirred for 12 h in oil bath. Removed for bath and cooled to room temperature. Quenched the reaction with water and extracted with EtOAc (10 mL x 3). Washed the combined organic layer with water (10 mL x 3) and brine (10 mL x 3). Dried over anhydrous Na 2 SO 4. Purified by silica gel column chromatography using hexane/EtOAc (0% to 50% EtOAc gradient) to give the product (90 mg, 240 μmol, 80% yield) as a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.26 (hexane/EtOAc, 50% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.95 (d, J = 8.5 Hz, 2H), 7.74 (d, J = 8.5 Hz, 2H), 7.46 (d, J = 4.0 Hz, 1H), 7.29 – 7.22 (m, 2H), 7.04 (dd, J = 8.6, 1.2 Hz, 1H), 6.98 (td, J = 7.4, 1.3 Hz, 1H), 4.16 (d, J = 68.5 Hz, 2H), 3.34 (s, 3H), 1.34 (dt, J = 43.8, 6.6 Hz, 12H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 159.44, 154.04, 144.00, 137.74, 130.40, 130.30, 129.80, 127.14, 126.23, 120.30, 116.99, 46.88, 45.54, 45.36, 21.58, 21.52, 20.87 ppm. Specific rotation: [α] = -2.78 (c 1.00, CHCl3) HRMS: Calc’d for C20H27N2O3 + S [M+H ] 375.1737; found 375.1721. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 9.480 min, minor: 11.847 min. GP-13 was followed and no additional change: N,N-diisopropyl urea protected methyl bi-aryl sulfoximine (0.1 mmol) was used. Purified by silica gel column chromatography using hexane/acetone (0% to 60% acetone gradient) to give the product (20.6 mg, 83 μmol, 83% yield) as a white solid. Physical characteristics: White amorphous solid. TLC: Rf = 0.2 (hexane/acetone, 50% acetone). 1 H NMR: (500 MHz, DMSO-d 6 ) δ 9.74 (s, 1H), 7.92 (d, J = 8.5 Hz, 2H), 7.74 (d, J = 8.5 Hz, 2H), 7.29 (dd, J = 7.6, 1.8 Hz, 1H), 7.20 (ddd, J = 8.2, 7.3, 1.7 Hz, 1H), 6.96 (dd, J = 8.1, 1.2 Hz, 1H), 6.90 (td, J = 7.5, 1.2 Hz, 1H), 4.17 (s, 1H), 3.08 (s, 3H) ppm. 13 C NMR: (126 MHz, DMSO-d6) δ 154.48, 142.73, 141.96, 130.40, 129.53, 129.47, 126.98, 126.22, 119.60, 116.18, 45.89 ppm. Specific rotation: = +5.53 (c 1.00, MeOH) HRMS: Calc’d for C 13 H 14 NO 2 S [M+H + ] 248.0740; found 248.0740. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: major: 12.407 min, minor: 20.907 min. Asymmetric sulfonimidamide analog synthesis of AstraZeneca’s begacestat.
GP-2 was used with no additional change: commercially available 2-bromo-5- chloro-thiophene (721 mg, 6.08 mmol, 1.5 eq.) with t-BuSF (1.08 g, 4.05 mmol, 1 eq.) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 45% EtOAc gradient) to give the product (1.21 g, 3.32 mmol, 82% yield, > 99% ee) as a white amorphous solid. GP-6 was followed with no additional change: N,N-diisopropyl urea protected tert- butyl 5-Cl-thiophene sulfoximine (1.2 g, 3.29 mmol, 1.0 eq) was used. Purified by silica gel column chromatography using hexane/EtOAc (0% to 30% EtOAc gradient) to give the product (790 mg, 2.42 mmol, 73% yield) as colorless oil which solidified into a white amorphous solid. Physical characteristics: White amorphous solid. TLC: R f = 0.75 (hexane/EtOAc, 40% EtOAc). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.78 (d, J = 4.2 Hz, 1H), 7.03 (d, J = 4.2 Hz, 1H), 4.12 (s, 1H), 3.86 (s, 1H), 1.31 (d, J = 6.8 Hz, 6H), 1.23 (dd, J = 6.8, 4.2 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 153.15, 142.04 (d, J = 2.1 Hz), 135.33, 131.63 (d, J = 30.0 Hz), 127.15, 48.42, 46.05, 21.28, 20.57 ppm. 19 F NMR: (471 MHz, CDCl3) δ 77.11 ppm. Specific rotation: [α] = +7.23 (c 1.00, CHCl3) HRMS: Calc’d for C11H17ClFN2O2S [M+H + ] 327.0399; found 327.0399. Enantiomeric excess: > 99% ee. HPLC Conditions: Daicel Chiralpak IC column, 70:30 n-hexane:i-PrOH, flow rate: 1 mL min-1, 25 °C, UV detection wavelength: 220 nm, retention time: minor: 9.220 min, major: 10.873 min. The protection was finished with reported method with no modification and spectroscopic data was in accordance with the literature. (Org. Lett.2007, 9, 1, 101–104). 1 H NMR: (500 MHz, CDCl 3 ) δ 3.65 (dd, J = 9.8, 4.1 Hz, 1H), 3.40 (dd, J = 9.8, 7.6 Hz, 1H), 2.59 (ddd, J = 7.6, 6.2, 4.0 Hz, 1H), 2.14 (s, 2H), 1.72 – 1.57 (m, 1H), 0.92 (dd, J = 7.7, 6.8 Hz, 6H), 0.89 (s, 9H), 0.05 (s, 6H) ppm. GP-10 was followed with no additional change: N,N-diisopropyl urea protected 5- Cl-thiophene sulfonimidoyl fluoride (98 mg, 0.3 mmol, 1.0 eq) was used with OTBS protected primary amine (2 eq.). Purified by silica gel column chromatography using hexane/EtOAc (0% to 15% EtOAc gradient) to give the product (130 mg, 248 μmol, 83% yield) as a colorless oil. Physical characteristics: Colorless oil. TLC: Rf = 0.55 (hexane/EtOAc, 10% EtOAc). 1 H NMR: (500 MHz, CDCl3) δ 7.91 (d, J = 8.2 Hz, 1H), 7.43 (d, J = 4.1 Hz, 1H), 7.39 (d, J = 4.0 Hz, 0.01H, from S-diastereomer), 6.84 (d, J = 4.1 Hz, 1H), 4.33 (s, 1H), 3.69 (s, 1H), 3.45 (dd, J = 10.2, 3.8 Hz, 1H), 3.30 (dd, J = 10.2, 5.3 Hz, 1H), 3.16 – 3.06 (m, 1H), 2.02 (dp, J = 13.6, 6.8 Hz, 1H), 1.29 (t, J = 8.0 Hz, 6H), 1.13 (dd, J = 11.8, 6.8 Hz, 6H), 0.95 (dd, J = 7.0, 2.6 Hz, 7H), 0.86 (s, 10H), -0.00 (s, 3H), -0.02 (s, 3H) ppm. 13 C NMR: (126 MHz, CDCl 3 ) δ 157.72, 141.59, 136.80, 130.88, 125.93, 61.42, 59.93, 47.59, 45.19, 29.52, 25.92, 21.21, 21.05, 20.78, 19.12, 18.50, 18.31, -5.52, -5.57 ppm. Specific rotation: [α] = -42.01 ( ’ ] 524.2198; found 524.2196. Modified GP-14 was used to telescope OTBS deprotection: To a 5 mL vial with magnetic stir bar, dissolved N,N-diisopropyl urea protected 5-Cl-thiophene sulfonimidamide (105 mg, 0.2 mmol, 1.0 eq) in DMSO (0.1 M, 2.0 mL) then added water (0.2 mL) and heated to 80 °C for 12 h. Cooled to room temperature then TBAF (1.0 mL, 5.0 eq, 1.0 M in THF, used as received) was added slowly to the mixture. Upon completion (checked by TLC) water (10 mL) was added and extracted with EtOAc (15 mL x 3), washed with water (10 mL x 3) and brine (10 mL x 3), dried over N2SO4, filtered and concentrated. Purified by silica gel column chromatography using hexane/acetone (0% to 50% acetone gradient) to give the product (40 mg, 141 μmol, 71% yield) as a colorless oil. Physical characteristics: Colorless oil. TLC: R f = 0.51 (hexane/EtOAc, 50% acetone). 1 H NMR: (500 MHz, CDCl 3 ) δ 7.40 (d, J = 4.1 Hz, 1H), 6.90 (d, J = 4.0 Hz, 1H), 3.72 (m, J = 14.3, 12.2, 6.3, 3.7 Hz, 2H), 3.62 – 3.54 (m, 2H), 3.21 (td, J = 6.5, 4.0 Hz, 1H), 3.15 (d, J = 4.1 Hz, 0.01 H, from S-diastereomer ) 1.77 (dq, J = 13.5, 6.8 Hz, 1H), 0.83 (t, J = 6.4 Hz, 6H) ppm. 13 C NMR: (126 MHz, CDCl3) δ 142.75, 137.13, 131.34, 127.02, 63.66, 62.25, 30.07, 19.34, 18.49 ppm. Specific rotation: [α] = +39.44 (c 1.00, CHCl3) HRMS: Calc’d for C9H16N2O2S2 [M+H + ] 283.0336; found 283.0336. Diastereomeric excess: > 99% de by 1 HNMR. The compositions and methods of the appended claims are not limited in scope by the specific compositions and methods described herein, which are intended as illustrations of a few aspects of the claims and any compositions and methods that are functionally equivalent are intended to fall within the scope of the claims. Various modifications of the compositions and methods in addition to those shown and described herein are intended to fall within the scope of the appended claims. Further, while only certain representative compositions and method steps disclosed herein are specifically described, other combinations of the compositions and method steps also are intended to fall within the scope of the appended claims, even if not specifically recited. Thus, a combination of steps, elements, components, or constituents may be explicitly mentioned herein; however, other combinations of steps, elements, components, and constituents are included, even though not explicitly stated. The term “comprising” and variations thereof as used herein is used synonymously with the term “including” and variations thereof and are open, non-limiting terms. Although the terms “comprising” and “including” have been used herein to describe various embodiments, the terms “consisting essentially of” and “consisting of” can be used in place of “comprising” and “including” to provide for more specific embodiments of the invention and are also disclosed. Other than in the examples, or where otherwise noted, all numbers expressing quantities of ingredients, reaction conditions, and so forth used in the specification and claims are to be understood at the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, to be construed in light of the number of significant digits and ordinary rounding approaches.