60/154,728 filed 20 September 1999.

FIELD OF THE INVENTION The invention relates to a hydroformylation process using certain multidentate phosphite ligands. In particular, the ligands have heteroatom- containing substituents on the carbon attached to the ortho position of the terminal phenol group.

TECHNICAL BACKGROUND OF THE INVENTION Phosphorus ligands are ubiquitous in catalysis and are used for a number of commercially important chemical transformations. Phosphorus ligands commonly encountered in catalysis include phosphines (A), and phosphites (B), shown below. In these representations, R can be virtually any organic group.

Monophosphine and monophosphite ligands are compounds which contain a single phosphorus atom which serves as a donor to a metal. Bisphosphine, bisphosphite, and bis (phosphorus) ligands in general, contain two phosphorus donor atoms and normally form cyclic chelate structures with transition metals.

There are several industrially important catalytic processes employing phosphorus ligands. For example, U. S. Patent No. 5,910,600 to Urata, et al. discloses that bisphosphite compounds can be used as a constituting element of a homogeneous metal catalyst for various reactions such as hydrogenation, hydroformylation, hydrocyanation, hydrocarboxylation, hydroamidation, hydroesterification and aldol condensation.

Some of these catalytic processes are used in the commercial production of polymers, solvents, plasticizers and other commodity chemicals. Consequently,

c. je to the extremely large worldwide chemical commodity n. arket, ever incremental advances in yield or selectivity in any of these commercially important reactions are highly desirable. Furthermore, the discovery of certain ligands that may be useful for applications across a range of these commercially important reactions is also highly desirable not only for the commercial benefit, but also to enable consolidation and focusing of research and development efforts to a particular group of compounds.

One industrially important catalytic reaction using phosphorus ligands of particular importance is olefin hydroformylation. For example, U. S. Patent No.

5,235,113 to Sato, et al. discloses a hydroformylation process in which an organic bidentate ligand containing two phosphorus atoms linked with an organic dihydroxyl bridging group is used in a homogeneous hydroformylation catalyst system. Hydroformylation processes involving organic bidentate ligands containing two trivalent phosphorus atoms, in which the two phosphorous atoms are linked with a 2, 2' dihydroxyl-1, 1'-binaphthalene bridging group, are described in commonly assigned, copending application Serial Number 60/087, 151, filed May 29,1998, and the patents and publications referenced therein.

Commonly assigned, published PCT Application W099/06357 discloses multidentate phosphite ligands with a structure having alkyl ether substituents on the carbon attached to the ortho position of the terminal phenol group for use in a liquid phase process for the hydrocyanation of diolefinic compounds.

It always remains desirable to provide even more effective, higher performing catalyst precursor compositions, catalytic compositions and catalytic processes to achieve full commercial potential for a desired reaction such as hydroformylation. The effectiveness and/or performance may be achieved in any or all of rapidity, selectivity, efficiency or stability. Other objects and advantages of the present invention will become apparent to those skilled in the art upon reference to the detailed description which hereinafter follows.

SUMMARY OF THE INVENTION The invention provides for a hydroformylation process comprising reacting an acyclic, monoethylenically unsaturated compound with CO and H2 in the presence of a catalyst precursor composition comprising a transition metal, and at least one multidentate phosphite ligand selected from the group represented

by the folloJ ing formulae I, I-A or I-B, in which all like reference characters have the same meaning, except as further explicitly limited.

The invention further provides for the hydroformylation of aromatic olefins comprising reacting an acyclic aromatic olefin compound with CO and H2 in the presence of a catalyst precursor composition comprising a low-valent transition metal, and at least one multidentate phosphite ligand selected from the group represented by the following formulae I, I-A or I-B, in which all like reference characters have the same meaning, except as further explicitly limited.

Formula I wherein Xl is a bridging group selected from the group consisting of :

wherein R1,R2,R3,R4,R5,R6,R7,R8,R1', and R2' are independently selected from the group consisting of H, C1 to C18 alkyl, cycloalkyl, trialkylsilyl, triarylsilyl, halogen, nitrile, perfluoroalkyl,-SO2RI l,- SO2NR212, acetal, ketal, dialkylamino, or diarylamino,-OR",- C02R",- (CNR") R",- (CNOR") R", wherein R"is C, to Cis alkyi, aryl, or substituted aryl,-C (O) R12, -C (O) NR12R13,-O-C(O)R12,- NR12-C(O)R13, wherein R12 and R are independently selected from the group of H, C1 to C18 alkyl, cycloalkyl, aryl, or substituted ;aryl wherein positions other than R'through R8 on the aromatic rings may also be substituted with Cl to C18 alkyl, cycloalkyl, trialkylsilyl, triarylsilyl, halogen, nitrile, perfluoroalkyl, sulfonyl, acetal, ketal, dialkylamino, diarylamino,-OR",-C02R", R CNR", or RCNOR11, wherein R9 and R10 are independently selected from the group consisting of H, Cl to C18 alkyl, cycloalkyl, aryl, or substituted aryl; wherein X2 through X5 are independently selected from the group consisting of :

wherein Y is independently selected from the group consisting of H, aryl, CR143, (CR142) n-OR14, (CR142) n-NR15, wherein R14 is H, C1-C18 alkyl, cycloalkyl, or aryl, wherein Rl5 is selected from the group consisting of H, alkyl, aryl, -SO2R11, -SO2NR122, -COR16, wherein Rl6 is H, C1-C18 alkyl, cycloalkyl, aryl or ;perfluoroalkyl and Z is selected from the group consisting of (CRl42) n-oRl4 wherein n=0-3.

Formula I-A In other embodiments of the invention a ligand of the structure of Formula I-A may be substituted for the ligand of Formula I, and in those embodiments an aromatic ring carbon in the ortho position to an O bonded to a P may be bonded through (Zl) nl to another aromatic ring carbon in the ortho position to the other O bonded to the P; wherein Z1 is independently

and each of Rl7 and Rl8 are independently selected from the group consisting of H, Cl to Cl8 alkyl, cycloalkyl, aryl, or substituted aryl, n1 is either one or zero; and wherein it is understood that n'= 0 represents a bond replacing the two aromatic ring hydrogens.

Formula I B

In other embodiments of the invention a ligand of the structure of Formula I-B may be substituted for the ligand of Formula I, and wherein an aromatic ring carbon in the ortho position to an O bonded to a P may be bonded through (Zl) nl to another aromatic ring carbon in the ortho position to the other O bonded to the P; wherein Z'is independently and each of Rl7 and Rl8 are independently selected from the group consisting of H, Cl to C1g alkyl, cycloalkyl, aryl, or substituted aryl, n'is either one or zero; and wherein it is understood that nl = 0 represents a bond replacing the two aromatic ring hydrogens.

Furthermore, in embodiments of the invention utilizing Formula I, Formula I-A or Formula I-B, either one of the Y's may be linked with Z to form a cyclic ether.

The invention further provides for a hydroformylation process comprising reacting an acyclic, monoethylenically unsaturated compound with CO and H2 in the presence of a catalyst precursor composition comprising a transition metal, and at least one multidentate phosphite ligand selected from the group represented

by the following folmula I, II-A or II-B, in which all ll,'ke reference characters have the same meaning, except as further explicitly limited.

The invention further provides for the hydroformylation of aromatic olefins comprising reacting an acyclic aromatic olefin compound with CO and H2 in the presence of a catalyst precursor composition comprising a low-valent transition metal, and at least one multidentate phosphite ligand selected from the group represented by the following formulae II, II-A or II-B, in which all like reference characters have the same meaning, except as further explicitly limited.

Formula Il wherein Xl is a divalent bridging group and is selected from the group consisting of :

wherein Rl, R2, R3, R4, Rs, R6, R7, R8, Ri, and R2 are independently selected from the group consisting of H, C1 to C18 alkyl, cycloalkyl, trialkylsilyl, triarylsilyl, halogen, nitrile, perflurooalkyl, -SO2R11, - SO2NR212, acetal, ketal, dialkylamino, or diarylamino,-OR",- CO2R11, -(CNR11)R11, -(CNOR11)R11, wherein R11 is C1 to C18 alkyl, cycloalkyl, aryl, or substituted aryl,-C (O) R 12,-C (O) NR 12R13, _0_ C (O) R12, -NR12-C(O)R13, wherein R12 and R13 are independently selected from the group of H, Cl to Cl8 alkyl, cycloalkyl, aryl, or substituted aryl; wherein positions other than R1 through R8 on the aromatic rings may also be substituted with Cl to Cl8 alkyl, cycloalkyl, trialkylsilyl, triarylsilyl, halogen, nitrile, perfluoroalkyl, sulfonyl, acetal, ketal, dialkylamino, diarylamino, -OR11, -CO2R11, R CNR", or RCNOR"wherein R9 and Rl° are independently selected from the group consisting of H, Cl to C18 alkyl, cycloalkyl, aryl, or substituted aryl, wherein X2 through X5 are independently selected from the group consisting of :

Y1 is independently selected from the group consisting of H, aryl, CR143, wherein R'"is H, Cl-C18 alkyl, cycloalkyl, or aryl, (CRl42) n- OR14, (CR142) n-NR15 wherein n is a number between 0 and 3, wherein Ru 5 ils selected from the group consisting of H, alkyl, cycloalkyl, aryl, -SO2R11, -SO2NR122, -COR16 wherein R16 is H, Cl- Ci8 alkyl, cycloalkyl, aryl, or ;perfluoroalkyl y2 is independently selected from the group consisting of aryl, CR143, wherein R14 is H, Cl-Cl8 alkyl, cycloalkyl, or aryl, (CR142) n- OR14, (CR142) n-NR15 wherein n is a number between 0 and 3, wherein Ris is selected from the group consisting of H, alkyl, cycloalkyl, aryl, -SO2R11, -SO2NR122, -COR16 wherein Rlb is H, Cl- Cls alkyl, cycloalkyl, aryl, or ;perfluoroalkyl Z is selected from the group consisting of (CR142)n-OR14 wherein n = 0-3.

Formula II-A In other embodiments of the invention a ligand of the structure of Formula II-A may be substituted for the ligand of Formula II, and wherein an aromatic ring carbon in the ortho position to an O bonded to a P may be bonded through (Zl) nl t@ a@@@@ @@ arom@@@ ring carbon in the ortho position to thç @@ther O bonded to the P; wherein Z'is independently

and each R and Rl8 are independently selected from the group consisting of H, C, to C18 alkyl, cycloalkyl, aryl, or substituted aryl, nl is either one or zero; and wherein it is understood that n1 = 0 represents a bond replacing the two aromatic ring hydrogens.

Formula II-B In other embodiments of the invention a ligand of the structure of Formula II-B may be substituted for the ligand of Formula II, and an aromatic ring carbon in the ortho position to an O bonded to a P may be bonded through (Zl) nl to another aromatic ring carbon in the ortho position to the other O bonded to the P; wherein Z'is independently and each Rl7 and R'8 are independently selected from the group consisting of H, Cl to Cig alkyi, cycloalkyi, aryl, or substituted aryl, n'is either one or zero;

and wherein' : rsto'hat n'= 0 represents a bord replacing t two aromatic ring hydrogens.

Furthermore, in embodiments of the invention utilizing Formula II, Formula II-A or Formula II-B, either Y'or y2 may be linked with Z to form a cyclic ether.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention provides for an improved hydroformylation process which employs certain multidentate phosphite ligands. The catalyst compositions useful in the process of the invention are comprised of a multidentate phosphite ligand and a transition metal.

The divalent bridging compounds used in the ligands described in Formulae I, I-A, I-B, II, II-A, and II-B may be prepared by a variety of methods known in the art. For example, dimethyl 2, 2'-dihydroxyl-1, 1'-binaphthalene-3, 3'- dicarboxylate can be prepared according to J. Am. Chem. Soc., 1954,76,296 or in Tetrahedron Lett., 1990,413 and Org. Proc. Prep. International, 1991, 23, 200; 2,2'-ethylidenebis (4,6-dimethylphenol) can be prepared according to Bull. Chem.

Soc,. Japn., 1989,62,3603; 3,3', 5,5'-tetramethyl-2,2'-biphenol can be prepared according to J. Org. Chem., 1963, 28, 1063; 2,2'-dihydroxy-3,3'-dimethoxy-5, 5'- dimethyl-1, 1'-biphenylene can be prepared according to Phytochemistry, 1988, 27, 3008 ; and 3,3'-dimethyl-2,2'-dihydroxydiphenylmethane can be prepared according to Synthesis, 1981,2,143.3, 3', 5, 5', 6,6'-Hexamethyl-2,2'-biphenol can be prepared according to JP 85-216749.

Acetal substituted salicylaldehydes can be prepared by those skilled in the art. For example, an acetal can be prepared by refluxing a glycol with salicylaldehyde in the presence of oxalic acid catalyst. For references for preparing acetals by the acid catalyzed reaction of an aldehyde and an alcohol, see Tetrahedron, 1996,14599; Tet. Lett., 1989,1609; Tetrahedron, 1990, 3315.

Cyclic ether substituted phenols can be prepared as described in Aust. J. Chem.

1988, 41, 69-80.

Phosphorochloridite may be prepared by a variety of methods known in the art, for example, see descriptions in Polymer, 1992, 33, 161; Inorganic Synthesis, 1966, 8, 68;. U. S. 5,210,260; Z. Anorg. Allg. Chem., 1986, 535, 221.

With ortho-substituted phenols, phosphorochloridites can be prepared in situ from

PC13 and the phenol./, ; : sphoi.. oridites of 1-naphthols can be prepareu in situ from PCl3 and 1-naphthols in the presence of a base like triethylamine.

Another process for preparing the phosphochlorodite comprises treatment of N, N-dialkyl diarylphosphoramidite with HC1. ClP (OMe) 2 has been prepared in this manner, see Z. Naturforsch, 1972,27B, 1429. Phosphorochloridites derived from substituted phenols have been prepared using this procedure as described in commonly assigned U. S. Patent No. 5,821, 378.

By contacting the thus obtained (OAr) 2PCl, wherein Ar is a substituted aryl, with a divalent bridging compound, for example by the method described in U. S. Patent No. 5,235,113, a bidentate phosphite ligand is obtained which can be used in the process according to the invention.

Bis (phosphite) ligands supported on polymer resins such as Merrifield's resin can be prepared by similar methods, such as those described in Hetet, C. L., David, M., Carreaux, F., Carboni, B. and Sauleau, A., Tetrahedron Lett., 1997, 38, 5153-5156, and Gisin, B. F. Helv. Chim. Acta 1973, 56, 1476-1482.

The transition metal may be any transition metal capable of carrying out catalytic transformations and may additionally contain labile ligands which are either displaced during the catalytic reaction, or take an active part in the catalytic transformation. Any of the transition metals may be considered in this regard.

The preferred metals are those comprising group VIII of the Periodic Table. The preferred metals for hydroformylation are rhodium, cobalt, iridium, ruthenium, palladium and platinum.

Group VIII compounds suitable for hydroformylation, can be prepared or generated according to techniques well known in the art, as described, for example, WO 95 30680, U. S. 3,907,847, and J. Amer. Chem. Soc., 1993, 115, 2066. Examples of suitable Group VIII metals are ruthenium, rhodium, and iridium. Suitable Group VIII metal compounds are hydrides, halides, organic acid salts, acetylacetonates, inorganic acid salts, oxides, carbonyl compounds and amine compounds of these metals. Examples of suitable Group VIII metal compounds are, for example, Ru3 (CO) 12, Ru (N03) 2, RuCl3 (Ph3P) 3, Ru (acac) 3, Ir4 (CO) 12, IrSO4, RhCl3, Rh (N03) 3, Rh (OAc) 3, Rh203, Rh (acac) (CO) 2, [Rh (OAc) (COD)] 2, Rh4(CO)12, Rh6(CO)16, RhH(CO)(Ph3P)3, [RH(OAc)(CO)2]2, and [RhCl (COD)] 2 (wherein"acac"is an acetylacetonate group;"OAc"is an

acetyl group;"COD"is 1, 5-cycloo-f, and 'is. phenyl group).

However, it should be noted that the Group VIII metal compounds are not necessarily limited to the above listed compounds. The Group VIII metal is preferably rhodium. Rhodium compounds that contain ligands which can be displaced by the multidentate phosphites are a preferred source of rhodium.

Examples of such preferred rhodium compounds are Rh (CO) 2 (acetylacetonate), Rh(CO)2(C4H9COCHCO-t-C4H9), Rh2O3, Rh4(CO)12, Rh6(CO)16, Rh(O2CCH3)2, and Rh (2-ethylhexanoate). Rhodium supported on carbon may also be used in this respect.

DESCRIPTION OF SPECIFIC HYDROFORMYLATION PROCESSES- HYDROFORMYLATION OF MONOOLEFINIC COMPOUNDS The present invention also provides a process for hydroformylation, comprising reacting a monoethylenically unsaturated compound with a source of CO and H2 in the presence of a catalyst precursor composition comprising a transition metal selected from the group of Co, Rh, Ru, Ir, Pd, and Pt, and at least one multidentate phosphite ligand selected from the group represented by Formula I, I-A, I-B, II, 11-A, or II-B as described above.

Representative ethylenically unsaturated compounds which are useful in the process of this invention are shown in Formulae III, V or VII, and the corresponding terminal aldehyde compounds produced are illustrated by Formulae IV, VI or VIII, respectively, wherein like reference characters have same meaning. Catalyst H3C-CH2) y-CH=CH- (CH2) x R9 Composition HC- (CH2) y+X+s-R9 HZ Formula III Formula IV or Catalyst Composition 2) X+R H2/CO

Formula V Formula VI wherein R19 is H, CN, C02R20, or ;perfluoroalkyl y is an integer of 0 to 12; <BR> <BR> <BR> x is an integer of 0 to 12 when R19 is H, CHO, CO2R2° or ;perfluoroalkyl x is an integer of 1 to 12 when Rl9 is CN; and R20 is Cl to C12 alkyl, or aryl. CHO Catalyst Composition H CO R21 R21 Formula VII Formula VIII R21 is an alkyl, aryl, aralkyl, alkaryl, or fused aromatic group of up to 20 carbon atoms; R21 may further be branched or linear; R21 may also contain heteroatoms such as O, N, and F.

The nonconjugated, aliphatic, monoolefinically unsaturated starting materials useful in this invention include unsaturated organic compounds containing from 2 to approximately 30 carbon atoms. Suitable unsaturated compounds include unsubstituted hydrocarbons as well as hydrocarbons substituted with groups which do not attack the catalyst, such as cyano. These unsaturated compounds include monoethylenically unsaturated compounds containing from 2 to 30 carbons such as ethylene, propylene, 1-butene, 2-pentene, 2-hexene, etc.; nonconjugated diethylenically unsaturated compounds such as allene; ethylenically unsaturated compounds having perfluoroalkyl substituents such as, for example, CZF2z+l where z is an integer of up to 20; and substituted compounds such as allyl alcohol, 3-pentenenitrile, 4-pentenenitrile, methyl-3- pentenoate, methyl-4-pentenoate, 3-pentenal, 4-pentenal, and functional derivatives, such as acetals, imines, and hydrazones derived from 3-or 4- pentenal;. As used herein, the term"pentenenitrile"is intended to be identical with"cyanobutene". The monoolefins propylene, 1-butene, 2-butene,

3-pentenenitrile, and 4-pentenenitrile are especially prefer. a pra. Il matter, when the nonconjugated aliphatic monoethylenically unsaturated compounds are used in accordance with this invention, up to about 10% by weight of the monoethylenically unsaturated compound may be present in the form of a conjugated isomer, which itself may undergo hydroformylation.

Preferred are nonconjugated linear alkenes, nonconjugated linear alkenenitriles, nonconjugated alkyl pentenoates, nonconjugated pentenals, acetal derivatives of pentenals, and perfluoroalkyl ethylenes. Most preferred substrates include methyl-3-pentenoate, 3-pentenal (3-pentenealdehyde), 3-and 4-pentenenitrile and CzF2z+lCH=CH2 (where z is 1 to 12).

The preferred products are terminal alkanealdehydes, linear aliphatic aldehyde nitriles, and 3- (perfluoroalkyl) propionaldehyde. Most preferred products are n-butyraldehyde, 2-phenylpropionaldehyde, and 5-cyano- valeraldehyde.

The reaction conditions of the hydroformylation process according to this invention are in general the same as used in a conventional process, described, for example, in U. S. Patent No. 4,769,498, which is incorporated herein by reference and will be dependent on the particular starting ethylenically unsaturated organic compound. For example, the temperature can be from room temperature to 200°C, preferably from 50-120°C. The pressure may vary from atmospheric pressure to 20 MPa, preferably from 0.15 to 10 MPa and more preferably from 0. 2 to 1 MPa. The pressure is, as a rule, equal to the combined hydrogen and carbon monoxide partial pressure. Extra inert gases may however be present. The molar ratio of hydrogen to carbon monoxide is generally between 10 to 1 and 1 to 10, preferably between 6 to 1 and most preferably 1 to 2.

The amount of rhodium compound is not specially limited, but is optionally selected so that favorable results can be obtained with respect to catalyst activity and economy. In general, the concentration of rhodium in the reaction medium is between 10 and 10,000 ppm and more preferably between 50-500 ppm, calculated as the free metal.

The molar ratio of multidentate phosphorus ligand to rhodium is not specially limited, but is optionally selected so that favorable results can be obtained with respect to catalyst activity, aldehyde selectivity, and process

economy. This ratio generally is from about 0.5 to 100 and preferakl y ~ ; ~ to 10 (moles of ligand to moles of metal).

The choice of solvent is not critical provided the solvent is not detrimental to catalyst, reactant and product. The solvent may be a mixture of reactants, such as the starting unsaturated compound, the aldehyde product and/or by-products.

Suitable solvents include saturated hydrocarbons such as kerosene, mineral oil or cyclohexane, ethers such as diphenyl ether, tetrahydrofuran or a polyglycol, ketones such as methyl ethyl ketone and cyclohexanone, nitriles such as methylglutaronitrile, valeronitrile, and benzonitrile, aromatics such as toluene, benzene and xylene, esters such as methyl valerate and caprolactone, dimethylformamide, and sulfones such as tetramethylenesulfone. The reaction may also be conducted with reactants and products in the gas phase.

Preferably, when a liquid reaction medium is used, the reaction mixture is agitated, such as by stirring or shaking.

Other catalysts useful in the practice of the present invention consist of the class of polymer-supported bis (phosphorus) ligands in combination with transition metal compounds, the metals of which are, for example, rhodium, ruthenium, cobalt, palladium or platinum. Alternatively, useful catalysts can be prepared from a combination of bis (phosphorus) ligand and a suitable transition metal complex, such as Rh (acetonylacetonate) (CO) 2 or Rh4 (CO) 12, dispersed on a suitable support, such as silica, alumina, carbon or a polymeric material.

The hydroformylation process according to the invention can be performed as described below: The preferred temperature range is from about 50°C to about 180°C, most preferably from about 90°C to 110°C. The temperature must be chosen so as to maintain all of the reactants and products in the vapor phase, but low enough to prevent deterioration of the catalyst. The particular preferred temperature depends to some extent on the catalyst being used, the olefinic compound being used, and the desired reaction rate. The operating pressure is not particularly critical and can conveniently from about 1-10 atmospheres (101.3 to 1013 kPa).

The pressure and temperature combination must be chosen so as to maintain reactants and products in the vapor phase.

The invention will now be illustrated by the following non-limiting examples of certain embodiments thereof, wherein all parts, proportions, and percentages are by weight, unless otherwise indicated.

The following definitions are applicable wherever the defined terms appear in this specification: The term"hydrocarbyl"designates a hydrocarbon molecule from which one hydrogen atom has been removed. Such molecules can contain single, double or triple bonds.

M3P: methyl 3-pentenoate COD: 1, 5-cyclooctadiene Et3N: triethylamine PCl3 : phosphorus trichloride THF: tetrahydrofuran 3PN; 3-pentenenitrile 2PN: 2-pentenenitrile 4PN: 4-pentenenitrile 2M3: 2-methyl-3-butenenitrile VN: valeronitrile 3FVN: 3-formylvaleronitrile 4FVN: 4-formylvaleronitrile 5FVN : 5-formylvaleronitrile BD: 1, 3-butadiene C cis t= trans L/M = ligand/metal An example of the protocol used to calculate conversion, linearity, and selectivity for a hydroformylation reaction follows: Total = c2PN+VN+t2PN+t3PN+4PN+c3PN+4FVN+3FVN+5FVN Products = c2PN+VN+t2PN+4FVN+3FVN+5FVN Accounting = Total/amount 3PN added initially Conversion = Products/Total Linearity = 5FVN/ (5FVN+4FVN+3FVN) Selectivity = 5FVN/Products

Example 1 Synthesis of Acetal A Salicylaldehyde (24.4 g, 200 mmol), ethylene glycol (31 g, 500 mmol), oxalic acid (1 g, 11 mmol), and toluene (150 mL) were combined and heated to reflux for 3 days in an apparatus equipped with a condenser and a Dean-Stark trap. After cooling, the solution was washed with NaHC03 and distilled water.

The solution was dried over MgS04, and the solvent was evaporated to give 26 g of an off white solid. It was crystallized from hexane.

Example 2 Synthesis of Acetal B Salicylaldehyde (244 g, 2.0 mol), 1,3-propanediol (228 g, 3.0 mol), and oxalic acid (4.5 g, 0.05 mol) were added to 400 mL toluene and heated to reflux for 8 hours in an apparatus equipped with a condenser and a Dean-Stark trap.

After cooling, the solution was washed with NaHC03 and distilled water, and the solution was dried over MgS04. The product precipitated when the solvent was being evaporated. The solid was collected and dissolved in hot hexane. The solution was filtered through Celiez (a filter aid manufactured by Johns Manville Corp.), and the product was crystallized to give 108 g of an off-white solid.

Example 3 Synthesis of Acetal C Salicylaldehyde (24 g, 0.2 mol), neopentyl glycol (20.9 g, 0.2 mol), oxalic acid (1 g, 11 mmol), and toluene (150 mL) were combined and heated to reflux for 2 days in an apparatus equipped with a condenser and a Dean-Stark trap. After cooling, the solution was washed with NaHC03 and distilled water. The solution was dried over MgS04, and the solvent was evaporated to give 39 g of a white solid, which was crystallized from hexane.

Example 4 Synthesis of Acetal D Salicylaldehyde (12.2 g, 0.1 mol) and trimethylorthoformate (10.6 g, 0. 1 mol) were dissolved in dry MeOH (40 mL), and H2S04 (0.25 g) was added. The

reaction was stirred for 2 day under nitrogen at room temperature. The reaction was quenched by adding solid NaHC03 followed by Na2C03 until the mixture became pH 9 or higher. The product was vacuum distilled (86. 5-88 °C, 2 torr), and 3.98 g of material was collected.

Example 5 Synthesis of Amino-Acetal E Salicylaldehyde (6.11 g, 0.05 mol), 2-anilinoethanol (8.23 g, 0.06 mol), and oxalic acid (0.45 g, 5 mmol) were dissolved in toluene (50 mL) and heated to reflux overnight in an apparatus equipped with a condenser and a Dean-Stark trap.

After cooling, the solution was washed with aqueous NaHCO3, distilled water, and the toluene solution was dried over MgS04. After filtration, hexane was added until the product began to precipitate. 5.89 g of solid was collected.

Example 6 Synthesis of Acetal F A 300 mL flask was charged with 14.929 g of 5-chlorosalicylaldehyde, 12.409 g of pinacol and 0.300 g of oxalic acid and 150 mL of toluene. The flask was connected to a Dean-Starke trap and the mixture refluxed overnight. The mixture was washed with aqueous sodium bicarbonate and the organic layer was dried over magnesium sulfate. The solvent was removed by rotary evaporation.

A yellow solid was obtained which was recrystallized from hot hexane. The solid was washed with acetonitrile to give 7.118 g of white solid.'H NMR (500 MHz, C6D6, 8) : 7.9 (s, 1H), 7. 17 (d, 2.6Hz, 1H), 7.08 (dd, J = 2.6,8.7 Hz, 1H), 6.73 (d, J=8.7Hz, 1H), 6.02 (s, 1H), 1.26 (s, 6H0, 1.18 (s, 6H).

Example 7 Synthesis of Acetal G A flask was charged with 18 g of 5-chlorosalicylaldehyde, 13 g of 1, 3- propanediol and 2 g of oxalic acid and 200 mL of toluene. The flask was connected to a Dean-Stark trap and the mixture refluxed for 12 hours. The mixture was washed with water and aqueous sodium bicarbonate. The organic layer was dried over magnesium sulfate and the solvent removed by rotary

evaporat t. A light brown oil was obta'ned (22.3g) which solidified upon standing. IH NMR (500 MHz, C6D6, 6) : 7.7 (s, 1H), 6.96 (d, 2.6Hz, 1H), 6. 72 (dd, J = 2.6,8.7 Hz, 1H), 6.49 (d, J=8.7Hz, 1H), 4.87 (s, 1H), 3. 37 (m, 2H), 2. 99 (m, 2H), 1. 37 (m, 1H), 0. 35 (m, 1H).

Example 8 Synthesis of Acetal H Salicylaldehyde (24 g, 0.2 mol), 2-methyl-1, 3-propanediol (18.0 g, 0. 2 mol), oxalic acid (2.0 g), and toluene (250 mL) were combined and heated to reflux for 2 days in an apparatus equipped with a condenser and a Dean-Stark trap. After cooling, the solution was washed with NaHCO3 (2 x 30 mL) and distilled water (30 mL). The solution was dried over MgS04, and the solvent was evaporated to give 39 g of a white solid, which was crystallized from hexane.

Example 9 Synthesis of Ligand A

Acetal A (1.33 g, 8.0 mmol) and PCl3 (0.55 g, 4 mmol) were dissolved in toluene (40 mL) and the solution was cooled to-40 °C. Et3N (1.0 g, 10.0 mmol) in toluene (15 mL) was added dropwise with stirring. The reaction was allowed to slowly warm to room temperature then stirred overnight. A mixture of Et3N (0.4 g, 4.0 mmol) and dimethyl 2, 2'-dihydroxy-1, 1'-binaphthalene-3, 3'- dicarboxylate (0.8 g, 2.0 mmol) in toluene (15 mL) was added to the phosphorochloridite solution, and the mixture was stirred for 2 hours. The solution was filtered through CeliteX, and the solvent was removed to give 2.0 g of product. 31P NMR (C6D6) : 8 132.6, other peaks at 146. 3, 130.3,130.7 ppm.

Example 10 Synthesis of Ligand B

Acetal A (1.33 g, 8.0 mmol) and PCl3 (0.55 g, 4 mmol) were dissolved in toluene (40 mL) and the solution was cooled to-40 °C. Et3N (1.0 g, 10.0 mmol) in toluene (15 mL) was added dropwise with stirring. The reaction was allowed to slowly warm to room temperature then stirred overnight. A mixture of Et3N (0.4 g, 4.0 mmol) and 3,3'-dimethoxy-5,5'-dimethyl-2,2'-biphenol (0.55 g, 2. 0 mmol) in toluene (15 mL) was added to the phosphorochloridite solution, and the mixture was stirred for 2 hours. The solution was filtered through CeliteX, and the solvent was evaporated to give 1.8 g of product. P NMR (C6D6): 8 134. 9, minor peaks at 145.4,132.3 ppm.

Example 11 Synthesis of Ligand C Acetal A (1.33 g, 8.0 mmol) and PC13 (0.55 g, 4 mmol) were dissolved in toluene (40 mL) and the solution was cooled to-40 °C. Et3N (1.0 g, 10.0 mmol) in toluene (15 mL) was added dropwise with stirring. The reaction was allowed

to slowly warm tc room temper ure then stirred overnight. A. mixture of Et3N (0.4 g, 4.0 mmol) and diphenyl 2, 2'-dihydroxy-1, 1'-binaphthalene-3, 3'- dicarboxylate (1. 05 g, 2.0 mmol) in toluene (15 mL) was added to the phosphorochloridite solution, and the mixture was stirred for 2 hours. The solution was filtered through CeliteS, and the solvent was removed to give 2.2 g of product. 31P NMR (C6D6) : 8 130. 2, minor peaks at 146.8, 131. 4 ppm.

Example 12 Svnthesis of Ligand D Acetal C (1.67 g, 8.0 mmol) and PC13 (0.55 g, 4 mmol) were dissolved in toluene (40 mL) and the solution was cooled to-40 °C. Et3N (1.0 g, 10.0 mmol) in toluene (15 mL) was added dropwise with stirring. The reaction was allowed to slowly warm to room temperature then stirred overnight. A mixture of Et3N (0.4 g, 4.0 mmol) and 3,3', 5,5'-tetramethyl-2,2'-biphenol (0.48 g, 2.0 mmol) in toluene (15 mL) was added to the phosphorochloridite solution, and the mixture was stirred for 2 hours. The solution was filtered through Celite and the solvent was evaporated to give 1.3 g of white sticky solid. 31P NMR (C6D6): 8 135. 2, other peaks at 142.7,134.5 ppm.

Exampl-13 Synthesis of Ligand E

Acetal D (336 mg, 2.0 mmol) and Et3N (1.0 g, 10.0 mmol) were dissolved in toluene (5 mL) and the solution was added dropwise to a stirred,-20 °C solution of PCl3 (137 mg, 1.0 mmol) in toluene (2 mL). The reaction was stirred for 20 min, and then a mixture of 2, 2'-binaphthol (143 mg, 0.5 mmol) and Et3N (0.4 g, 4.0 mmol) in toluene (3 mL) was added to the phosphorochloridite solution, and the mixture was stirred 1 hour. The solution was filtered and the solvent was evaporated to give 0.57 g of product. 31p NMR (C6D6): 5 131. 7, minor peaks at 146, 130. 1 ppm.

Example 14 Synthesis of Ligand F With stirring under a dry, nitrogen atmosphere, a dry ether solution (50 mL) of Acetal C was added dropwise over a 20 minute period to N, N- diethylphosphoramidous dichloride (3.36 gm, 19.3 mmol) and dry triethylamine (4.88 gm, 48.3 mmol) dissolved in 150 mL of dry ether. After stirring overnight, the triethylammonium chloride solids were vacuum filtered and washed with dry

.'3 x iL). The combined ether filtrates were-aporated to yield the desired phosphoramidite, [2- [5, 5- (CH3) 2-1, 3-C3H502IC6FI4012PN (C2H5) 2, as a white solid (9.33 gm). 31P NMR (CDC13): 141. 9 ppm.

The phosphoramidite (9. 33 gm, 18.0 mmol) was dissolved in dry ether (150 mL) then cooled to-35°C in a drybox freezer. Hydrogen chloride in dry ether (36 mL, 1.0 M) was added dropwise over a 20 minute period to the cold, stirred phosphoramidite solution. The resulting mixture was returned to the freezer for another 1.5 hours. The solids were vacuum filtered and washed with dry ether (20 mL). The combined ether filtrates were evaporated to yield the phosphorochloridite of acetal C, [2- [5, 5- (CH3) 2-1, 3-C3H502] C6H40] 2PC1. 31p NMR (CDC13) : 163.9 ppm.

Di (2,6-dimethylphenyl) 2,2'-dihydroxy-1,1'-binaphthalene-3, 3'- dicarboxylate (0.792 gm, 1.36 mmol) was added to the phosphorochloridite of acetal C (1.634 gm, 3.40 mmol) dissolved in dry ether (50 mL). After cooling to- 35°C in a drybox freezer, the light yellow mixture was stirred as dry triethylamine (0.344 gm, 3.39 mmol) was added dropwise over a 5 minute period. After stirring at ambient temperature for another 2.5 hours, the mixture was filtered through dry, neutral alumina and the alumina was rinsed with dry tetrahydrofuran (50 mL). The combined filtrates were evaporated to yield the desired diphosphite ligand as a light yellow solid (0. 376 gm). 31P NMR (CDC13): 129.7 ppm.

Example 15 Synthesis ou Ligand G With stirring under dry nitrogen, 2, 2'-dihydroxy-1, 1'-binaphthalene-3, 3'- dicarboxylic acid (1.87 gm, 5.0 mmol) was dissolved in dry tetrahydrofuran (50 mL) then cooled to-78°C with a dry ice/acetone bath. Methyllithium (25 mL of

1 4 M iu _'..'S mn. was added dropwise then he solution--s allowed to warm to ambient temperature. After stirring overnight, the solution was added slowly to ice cold, 1 M hydrochloric acid (30 mL). The organic phase was washed with water then evaporated. The orange residue was dissolved in dichloromethane and eluted through a silica gel plug. The orange filtrate was evaporated to yield 2, 2'-dihydroxy-1, 1'-binaphthalene-3, 3'-bis (methylketone) as a yellow solid (1.52 gm).

2, 2'-Dihydroxy-1, 1'-binaphthalene-3, 3'-bis (methylketone) (0.200 gm, 0. 54 mmol) was added to the phosphorochloridite of Acetal C (0.651 gm, 1.35 mmol) dissolved in dry ether (50 mL). After cooling to-35°C in a drybox freezer, the light yellow mixture was stirred as dry triethylamine (0.155 gm, 1.53 mmol) was added dropwise over a 5 minute period. After stirring at ambient temperature for another 48 hours, the mixture was filtered through dry, neutral alumina and the alumina was rinsed with dry ether (50 mL). The combined filtrates were evaporated to yield the desired diphosphite ligand as a light yellow solid (0. 466 gm). 31P NMR (CDC13) : 134.1 ppm.

Example 16 Synthesis of Ligand H With stirring under dry nitrogen, 2, 2'-dihydroxy-1, 1'-binaphthalene-3, 3'- dicarboxylic acid (8. 42 gm, 22.5 mmol) was dissolved in dry tetrahydrofuran (500 mL) then cooled to-78°C with a dry ice/acetone bath. Phenyllithium (100 mL of 1.8 M in 70/30 cyclohexane/ether, 0.18 mol) was added dropwise then the solution was allowed to warm to ambient temperature. After stirring overnight, deionized water (50 mL) was slowly added to the reaction solution at 0°C. With vigorous stirring, 1 M hydrochloric acid was added dropwise until the water phase

beca ie strongly ac"."==2)'eorganicp'hasewaswash:d with water a separatory funnel then dried over magnesium sulfate and evaporated. The orange residue was redissolved in dichloromethane and eluted through a silica gel plug.

The orange filtrate was evaporated to yield 2, 2'-dihydroxy-1, 1'-binaphthalene- 3,3'-bis (phenylketone) as a yellow solid (10.5 gm).

2, 2'-Dihydroxy-1, 1'-binaphthalene-3, 3'-bis (phenylketone) (0.715 gm, 1. 45 mmol) was added to the phosphorochloridite of Acetal C (1.738 gm, 3.62 mmol) dissolved in dry ether (50 mL). After cooling to-35°C in a drybox freezer, the orange solution was stirred as dry triethylamine (0.365 gm, 3.62 mmol) was added dropwise over a 5 minute period. After stirring at ambient temperature for another 2.5 hours, the yellow mixture was filtered through dry, neutral alumina and the alumina was rinsed with dry ether (50 mL). The combined filtrates were evaporated to yield the desired diphosphite ligand as a light yellow solid (1. 68 gm). 31P NMR (CDC13) : 134.0 ppm.

Example 17 Synthesis of Ligand I Into a round bottom flask was added 0.412 g of phosphorus trichloride and about 50 mL of toluene. The mixture was cooled to-30 °C and 1.288 g of Acetal G was added. A precooled solution (-30 °C) of triethylamine (0.800 g) in 20 mL of toluene was added dropwise. A 31P NMR of the mixture indicated a major resonance at 164.1 ppm with minor resonances at 193. 3 and 132.5 ppm. To this mixture was added 0.405 g of 2, 2'-ethylidenebis (4,6-dimethylphenol), prepared

accordin to Yamada et al., '.'".''.o'?., 1989, 62, 3603, in 10 OriL of toluene and then 0.600 g of triethylamine. The mixture was stirred overnight and then filtered through CeliteX, washed with toluene, and solvent removed by rotary evaporation to yield the 1.8 g of a white solid. 31P {H} (202 MHz, C6D6): major resonance at 134.9 ppm, minor resonances at 132.6,132.2,130.9,128. 2 ppm. APCI MS (atmospheric pressure chemical ionization mass spectroscopy): Found: 1183.1; calculated for C58H60Ol4Cl4P2 + H+ : 1183. 22.

Example 18 Synthesis of Ligand J Acetal A (1.33 g, 8 mmol) and PC13 (0.55 g, 4 mmol) were dissolved in toluene (40 mL) and cooled to-40 °C. A solution of Et3N (1.0 g, 10 mmol) in toluene (15 mL) was added dropwise to the cold solution. The reaction was allowed to warm to room temperature then stirred overnight. A solution of (N- methyl, N-phenyl)-2, 2'-dihydroxy-1, 1'-binaphthalene-3, 3'-dicarboxamide (1. 1 g, 2 mmol) and Et3N (0.4 g, 4 mmol) in toluene (15 mL) was added and the mixture was stirred for 2 hours. The mixture was filtered through Celte and the solvent was removed to give 2.3 g of a yellow sticky product. 3'P NMR: 6 131. 6, smaller peak at 127.6, broad peaks at 133. 1,144. 1ppm.

Examr' Synthesis of Ligand K

With stirring under a dry, nitrogen atmosphere, 2- (tetrahydro-2- furanyl) phenol (5.10 gm, 31. 1 mmol) was added dropwise to N, N- diethylphosphoramidous dichloride (2.702 gm, 15.5 mmol) and dry triethylamine (3.77 gm, 37.3 mmol) dissolved in 200 mL of dry ether. After one hour, the triethylammonium chloride solids were vacuum filtered and washed with dry ether (3 x 15 mL). The combined ether filtrates were evaporated to yield the desired phosphoramidite, [2- (2-C4H70) C6H40] 2PN (C2H5) 2, as a viscous oil. 31p NMR (CDC13): 142.2,142.0,141.5, and 141.2 ppm due to a mixture of stereoisomers.

The phosphoramidite (5. 0 gm, 11.6 mmol) was dissolved in dry ether (50 mL) then cooled to-35 °C in a drybox freezer. Hydrogen chloride (24 mL, 1.0 M in dry ether) was added dropwise to the cold, stirred phosphoramidite solution.

Five minutes after the addition was complete, the solids were vacuum filtered and washed with dry ether (3 x 15 mL). The combined ether filtrates were evaporated to yield the phosphorochloridite of 2- (tetrahydro-2-furanyl) phenol, [2- (2- C4H70) C6H4012PCI. 31p NMR (C6D6): 163.7,162.9,162.5 ppm due to a mixture of stereoisomers.

Diphenyl 2, 2'-dihydroxy-1, 1'-binaphthalene-3, 3'-dicarboxylate (0.425 gm, 0.807 mmol) was added to the phosphorochloridite of 2- (tetrahydro-2- furanyl) phenol (0.793 gm, 2.02 mmol) dissolved in dry ether (50 mL). After cooling to-35°C in a drybox freezer, the light yellow mixture was stirred as dry triethylamine (0.204 gm, 2.02 mmol) was added dropwise over a 10 minute period. The mixture was filtered through dry, neutral alumina and the alumina was rinsed with dry ether (3 x 25 mL). The combined ether filtrates were

evaporated to yield the desired diphosphite ligand ayr'''solif*"1 gm). 31p NMR (C6D6): several peaks centered at 131 ppm due to a mixture of stereoisomers.

Example 20 Synthesis of Ligand L

Into a round bottom flask was added 0.343 g of phosphorus trichloride and about 50 mL of toluene. The mixture was cooled to-30 °C and 1.284 g of acetal F was added. A precooled solution (-30 °C) of triethylamine (0.700 g) in 20 mL of toluene was added dropwise. A 31P NMR analysis of the mixture indicated a major resonance at 162.6 ppm with minor resonances at 190.4 and 130.7 ppm. To this mixture was added 0.358 g of 2, 2'-binaphthol in 10 mL of toluene and then 0.600 g of triethylamine. The mixture was stirred overnight and then filtered through CeliteZ, washed with toluene and solvent removed by rotary evaporation to give 1.753 g of a white solid. 3lP {H} (202 MHz, C6D6): major resonance at 130.0 ppm, other resonances at 143.1 and 130.8 ppm. APCI MS: Found: 1366.3; calculated for C72H76014Cl4P2 : 1366. 346.

Example 21 Synthesis of Ligand M

Acetal A (1.33 g, 8 mmol) and PC13 (0.55 g, 4 mmol) were dissolved in toluene (40 mL) and cooled to-40 °C. A solution of Et3N (1.0 g, 10 mmol) in toluene (15 mL) was added dropwise to the cold solution. The reaction was allowed to warm to room temperature then stirred overnight. A solution of 2, 2'- biphenol (0. 37 g, 2 mmol) and Et3N (0.4 g, 4 mmol) in toluene (15 mL) was added and the mixture was stirred for 2 hours. The mixture was filtered through CeliteZ, and the solvent was removed to give 1.79 g of a pale, oily residue. 31P NMR: 8 131.3, smaller peaks at 132.5,144.2 ppm, Example 22 Synthesis of Ligand N Amino-Acetal E (482 mg, 2.0 mmol) and Et3N (0.67 g) were dissolved in toluene (10 mL). This solution was added to a-20 °C solution of PCl3 (137 mg, 1 mmol) in toluene (3 mL) over a 5 minute period. After the addition, the mixture

was stirred at-20 °C for 15 minutes. A suspension of 2,2'-binaphthol (14 0.5 mmol) and Et3N (0.33 g) in toluene (5 mL) was added in one portion and the mixture was allowed to stir for 2 days. The mixture was filtered, and the solvent was evaporated to give 0. 47 g of product. 31P NMR: 8 132. 1,130.8, small peaks at 147.2,144.9 ppm.

Example 23 Synthesis Ligand 0 Acetal C (25.0 g, 120 mmol) and PC13 (8.23 g, 60 mmol) were dissolved in toluene (100 mL) and cooled to-20 °C. Approximately two-thirds of a Et3N (21. 0 g, 200 mmol) solution in toluene (100 mL) was added dropwise to the acetal solution over a 30 minute period. The mixture was stirred for another 15 min at- 20 °C. Over the next hour, small portions of solid di (2-tolyl)-2, 2'-dihydroxy-1, 1'- binaphthalene-3,3'-dicarboxylate (16.5 g, 29.8 mmol), were added to the cold, chloridite solution (-10 to-15 °C) while alternating with equivalent portions of the remaining Et3N solution. The mixture was stirred for an hour, and the mixture was filtered. The solvent volume was reduced to between 100-200 mL toluene, and the solution was allowed to stand for 2 days. A fine white precipitate was collected (20.6 g). 3lP NMR: 8 129.5 very small peaks at 133.1,146.7 ppm.

Example 24 Preparation of carbon-supported catalyst using ligand 0 Crystalline Rh (CO) 2 (acac) (1 equiv), was dissolved into 2-4 mL toluene.

The light-yellow solution was added to solid ligand O (lOOmg), resulting in some bubbling and a change in solution color.

5g of granular (40-60 nesh) activated carbon (EM Scientific) was dried and calcined by heating in flowing helium (100 mL/min) at 850 °C for 5 hrs. The dried carbon was transferred to a nitrogen filled glove box where it was slurried into a toluene solution containing rhodium and ligand O. The slurry was stirred for 15 min then evaporated to dryness in vacuum. Residual solids, deposited on the sides of the vessel, were rinsed with extra toluene such that all were eventually deposited only onto the carbon. The dry solid was pumped overnight to remove residual toluene and then capped and stored in the glove box for catalytic testing.

Example 25 Synthesis of Ligand P

This diphosphite was prepared according to the general procedure described for ligand K except substituting the corresponding dimethyl ester for diphenyl 2, 2'-dihydroxy-1, 1'-binaphthalene-3, 3'-dicarboxylate. The product was an oil. 3lP NMR (C6D6) : 131.0,130.9,130.8,130.6,130.4,130.3 ppm due to a mixture of stereoisomers along with cyclic monophosphite impurity at 146.8 and 146.4 ppm.

Example 26 Ligand O-Svnthesis of Polymer Supported Ligand Preparation of a Supporte Disubstituted Binaphthol A mixture of 50 g (60 mmol) of Merrifield resin (polCH2Cl where pol = 1- 2 % crosslinked polystyrene, 200-400 mesh beads), 2, 2'-dihydroxy-1, 1'- binaphthalene-3,3'-dicarboxylic acid (33. 7 g), potassium carbonate (12.4 g) and DMF (dimethylformamide) (350 ml) was heated at 90 °C with stirring for 8 hrs.

The color of the resin changed from white to green-yellow. The mixture was diluted with water, filtered, washed with H20, DMF, and acetone, and then thoroughly dried in the air to give the desired product. IR (KBr, cl'') : 1712 (vs), 1676 (vs).

Functionalization of the Carboxvlate Group \/ 3 HO pH H CH2 pol 0 1,1-carbonyldiimidazole DMF Nv AOCH2t3pol POH HO 0

25 g. 8.7 mmol) of the polymer supported diol was suspended in 150 mL of anhydrous DMF, and to this mixture was added 4.54 g (28 mmol) of 1, 1- carbonyldiimidazole. The mixture was shaken overnight, and the polymer beads turned deep red-orange. The beads were collected by filtration and washed with DMF (3 x 100 mL), toluene (3 x 100 mL), and CH2C12 (3 x 100 mL) before drying under vacuum. IR (cmi', KBr): 1771 (vs), 1720 (vs).

Esterification of the Side Chain n\N //\ bH H6YoCH,--pot OH HOCH2 pol O O o-cresol, DBU DMF 01 OH Ho 0 OCH2 pol 0-a

25.93 g (18.7 mmol) of the polymer supported imidazolyl ester was suspended in 150 mL of anhydrous DMF. 10.10 g (93.5 mmol) of ortho-cresol and 2.845 g (18.7 mmol) of DBU (1, 8-Diazabicyclo [5.4.0] undec-7-ene) were added. The mixture was shaken for two days at room temperature. The product was collected by filtration and washed with DMF, toluene, and CH2Cl2 (3 x 100 mL) before final vacuum drying. IR (cl'', KBr): 1759 (w), 1720 (w), 1675 (vs).

Synthesis @@Lig nd Q base, CtPZz c-1) /\/ 0 86H H4OCH2opol base, base, CIPZ2 OCH2epol ZZP PZ2 O

24.8 g (17.4 mmol) of the supported diol was suspended in 150 mL of toluene, and to this suspension was added 25.0 g (52.1 mmol) of the phosphorochloridite derived from acetal C and 13.4 g of diisopropylethylamine. The mixture was shaken overnight at room temperature. The pale yellow beads were collected by filtration, washed with toluene, CH2Cl2 (3 x 100 mL), and then dried under vacuum. Elemental analysis: 1.15 wt % P (average).

Example17 Synthesis of Ligand R

The ethyl ether of 2-hydroxybenzyl alcohol was prepared according to a literature procedure reported in Recueil. Trav. Chim. Pays-Bas 1955, 74, 1448.

The phosphorochloridite of this phenol was prepared from PCl3 in toluene with triethylamine as base at-30°C. 31P nmr of the reaction mixture: 163.3 ppm. To this mixture was added diphenyl 2, 2'-dihydroxy-1, 1'-binaphthalene-3, 3'- dicarboxylate and triethylamine. The mixture was filtered through Celite and the solvent removed by rotary evaporation. The residue was dissolved in toluene and passed through basic alumina with toluene. Solvent was removed and the residue vacuum dried. 31P {H} NMR (202.4 MHz, CDC13) : major peak at 130. 8 ppm other resonances at 146.9 and 132.4 ppm.

Example 28 Synthesis of Ligand S

The procedure was the same as in example 27 (ligand R), except 3,3', 5, 5'- tetramethyl-2,2'-biphenol was used instead of diphenyl 2, 2'-dihydroxyl-1, 1'- binaphthalene-3,3'-dicarboxylate. 31p {H} NMR (202.4 MHz, CDC13): major peak at 133.5 ppm with minor resonances at 142.0 and 130.9 ppm.

Example 29 Synthesis ou Ligand T 2-Hydroxyphenethyl alcohol was reacted with bromoacetonitrile in the presence of potassium carbonate to protect the phenolic oxygen, as in Tetrahedron Letters, 1993, 34, 7567-7568.2-Hydroxyphenethyl alcohol was dissolved in 20 mL acetone. To this was added 1.2 g potassium carbonate. To the stirring mixture was added 0.87 g bromoacetonitrile under nitrogen. The mixture was stirred overnight. The mixture was filtered, and the filtrate was concentrated. The product was purified by flash column chromatography on silica gel, eluting with 1/1 ethyl acetate: hexanes, to yield 81% of 2- (o-cyanomethyl) phenethyl alcohol.

IH NMR (CD2Cl2) : 2.81 (t, 2H), 3.72 (t, 2H), 4.77 (s, 2H), 6.92 (dd, 2H), 7.18 (d, 2H). 2- (o-Cyanomethyl) phenethyl alcohol (1.0 g, 6. 3 mmol) was dissolved in 5 mL anhydrous DMF and added to a stirring solution of sodium hydride (0. 25g, 10.4 mmol) in DMF (20 mL). After hydrogen evolution ceases, methyl iodide (0.47 mL, 7.5 mmol) was added dropwise. The mixture was stirred at room temperature under nitrogen for five hours. After aqueous workup, the product was purified using flash column chromatography on silica gel, eluting with 1/5 ethyl. . ate/hexanes solvent mixture to yield O. JO g (56%) of the desired product, 2- (o-cyanomethyl) phenethyl methyl ether. 1H NMR (CD2Cl2) : 2.96 (t, 2H), 3. 36 (s, 3H), 3.60 (t, 2H), 4.86 (s, 2H), 7.04 (dd, 2H), 7.31 (d, 2H).

2- (o-Cyanomethyl) phenethyl methyl ether was deprotected following the procedure described in Tetrahedron Letters, 1993, 34, 7567-7568. 2- (o- Cyanomethyl) phenethyl methyl (0.56 g, 3.13 mmol) was dissolved in 40 mL anhydrous ethanol. Platinum dioxide (20 mg) was added to this solution. The solution was purged with hydrogen for 10 minutes, and then stirred under hydrogen overnight. The mixture was filtered, and the filtrate was concentrated.

The residue was redissolved in ether, washed with water, and dried over MgS04.

After concentration, 0.39 g (82%) of 2-hydroxyphenethyl methyl ether was isolated.'H NMR (CD2Cl2) : 2.78 (t, 2H), 3. 32 (s, 3H), 3.60 (t, 2H), 2-Hydroxyphenthyl methyl ether was reacted with diethylphosphoramidous dichloride to yield the corresponding phosphorous amidite in the same manner as described for Example 25. 31p NMR (toluene): 137 ppm. The phosphoroamidite was treated with 1M HCI solution following the procedure described for Example 25 to yield the corresponding phosphorochloridite. 31P NMR (toluene): 165 ppm. The phosphochloridite was then reacted with di (2-tolyl)-2, 2'-dihydroxy-1, 1'-binaphthalene-3, 3'-dicarboxylate in the same manner as described for Example 19. 31P NMR (toluene): 125 (major), 127 (minor), 142 (minor).

Example 3 Synthesis of Ligand U

The ethyl ether of 2-hydroxybenzyl alcohol was prepared as described in Example 27. The phosphorochloridite of this phenol was prepared from PCl3 in toluene with triethylamine as base at-30 °C. 31p nmr of the reaction mixture: 158,125 ppm. To the phosphorochloridite solution was added 2,2'-binapthol in the presence of triethylamine, as described in example 27. 31P NMR (toluene): 131 ppm (major), 146 (minor).

Example 31 Synthesis of Ligand V The ethyl ether of 2-hydroxybenzyl alcohol was prepared as described in Example 27. The phosphorochloridite of this phenol was prepared from PCl3 in

toluene with tc-":ineseat-30°C.'Pnmr of the ::-action 1,, xture 158,125 ppm. To the phosphorochloridite solution was added di (2-tolyl)-2, 2'- dihydroxy-1, 1'-binaphthalene-3, 3'-dicarboxylate in the presence of triethylamine, as described in example 27. 31P NMR (toluene): 131 (major), 146 (minor), 163 (minor).

Example 32 Synthesis of Ligand W 2- (2-Tetrahydropyranyl)-4-methyl-phenol was prepared from the corresponding phenol following the procedure outlined in Aust. J. Chem., 1988, 41, 69-84. In a nitrogen purged glove box, 2- (2-tetrahydropyranyl)-4-methyl- phenol (0.96 g, 5.0 mmol) was dissolved in 25 ml diethyl ether, and cooled to-40 °C. Diethylphosphoramidous dichloride (2.5 mmol) was added, followed by triethylamine (6 mmol). The reaction mixture was stirred at room temperature for one hour, then filtered over a pad of Celite. The filtrate was concentrated in vacuo to yield l. lg (90%) of the corresponding phosphorous amidite. 31P NMR (toluene): 142.7,142.6. The above phosphorous amidite (1. 1 g) was dissolved in 25 mL anhydrous ether and cooled to-40 °C. To the stirring phosphoramidite solution was slowly added 4.4 mL of precooled 1M HCl solution in ether. Upon addition, white precipitate formed. The mixture was stirred for 10 minutes, and cooled back to-40 °C for 2 hours. The resulting slurry was filtered over a pad of Celite, and concentrated in vacuo to yield 0.92 g of the corresponding phosphorochloridite. 3'P NMR (toluene): 161. 6 ppm. The above phosphorochloridite was reacted with di (2-tolyl)-2, 2'-dihydroxy-1, 1'-

binaphthalene-3, 3'-dicar'and t..-. ylamine to yield the corresponding ligand. 31P NMR (toluene): 130 (major).

Example 33 Synthesis of Ligand X The phosphorochloridite of 2- (2-tetrahydropyranyl)-4-methyl-phenol was prepared as described in example 32. The above phosphorochloridite was reacted with 3, 3', 4, 4', 6, 6'-hexamethyl-2,2'-biphenol and triethylamine to yield the corresponding ligand. 31P NMR (toluene): 134,131, 127.

Example 34 Svnthesis of Ligand Y 2- (2-Tetrahydropyranyl)-4-methyl-phenol was prepared from the corresponding phenol following the procedure outlined in Aust J Chem., 1988, 41, 69-84. In a nitrogen purged glo. (2-tct ydrcpyranyl)-4fnethyl- phenol (0.96 g, 5.0 mmol) was dissolved in 25 ml diethyl ether, and cooled to-40 °C. Diethylphosphoramidous dichloride (2.5 mmol) was added, followed by triethylamine (6 mmol). The reaction mixture was stirred at room temperature for one hour, then filtered over a pad of Celite. The filtrate was concentrated in vacuo to yield l. lg (90%) of the corresponding phosphorous amidite. 31P NMR (toluene): 142.7,142.6. The above phosphorous amidite (1.1 g) was dissolved in 25 mL anhydrous ether and cooled to-40 °C. To the stirring phosphorous amidite solution was slowly added 4.4 mL of precooled 1M HCl solution in ether. Upon addition, a white precipitate formed. The mixture was stirred for 10 minutes, and cooled to-40 °C for 2 hours. The resulting slurry was filtered over a pad of Celite and concentrated in vacuo to yield 0.92 g of the corresponding phosphorochloridite. 31p NMR (toluene): 161.6 ppm. The above phosphorochloridite was reacted with 1,1'-bi-2-napthol and triethylamine to yield the corresponding ligand. 3'P NMR (toluene): 131.11,131.14 (stereoisomers).

COMPARATIVE EXAMPLE A Synthesis of Ligand Z

With stirring under a dry, nitrogen atmosphere, 2-cyclopentylphenol (4. 10 gm, 25.3 mmol) was dissolved in dry ether (15 mL) then added dropwise to N, N- diethylphosphoramidous dichloride (2.00 gm, 11.5 mmol) and dry triethylamine (3.26 gm, 32.2 mmol) dissolved in 50 mL of dry ether. After stirring two hours, the triethylammonium chloride solids were vacuum filtered and washed with dry ether (2 x 15 mL). The combined ether filtrates were evaporated to yield the desired phosphoramidite, [2-(CsHg) C6H4O] 2PN (C2Hs) 2, as an oil.

The phosphoramidite (2.13 gm, 5.0 rnn. aisso. in diy et ver (50 mL) then cooled to-35°C in a drybox freezer. Hydrogen chloride in dry ether (10.0 mL, 1.0 M) was added dropwise over a 5 minute period to the cold, stirred phosphoramidite solution to generate the phosphorochloridite of 2- cyclopentylphenol, [2- (C5H9) C6H40] 2PCI. The resulting solids were vacuum filtered and washed with dry toluene (2 x 5 mL). The combined ether/toluene filtrates were concentrated to 50 mL volume.

Dry triethylamine (1. 01 gm, 10 mmol) was added to the ether/toluene solution followed by diphenyl 2, 2'-dihydroxy-1, 1'-binaphthalene-3, 3'- dicarboxylate (1.05 gm, 2.0 mmol). After stirring overnight in the drybox, the solids were vacuum filtered then washed with dry toluene (3 x 5 mL). The combined filtrates were evaporated to yield the diphosphite. 3 1 P NMR :(CDC13) 132.0 ppm. LC/MS (APCI+): m/e = 1231.

COMPARATIVE EXAMPLE B Synthesis of Ligand AA This diphosphite was prepared according to the general procedure described for ligand Z except substituting the corresponding dimethyl ester for diphenyl 2, 2'-dihydroxy-1, 1'-binaphthalene-3, 3'-dicarboxylate. 31P NMR (CDC13) : 131.5 ppm along with a monodentate phosphite impurity at 129.2 ppm.

Example 35 Hvdroformvlation of 3-Pentenenitrile (3PN) usinz Ligand A In the drybox was prepared a solution containing 3-pentenenitrile (3PN) (0.5 M), rhodium bis (carbonyl) acetylacetonate (Rh (acac) (CO) 2) (0. 9 mM), and 1,2-dichlorobenzene (internal standard, 0. 14 M) in toluene. A portion of this

solution was added to a glass-lined pressure vessel contair ioxim- ; -r9 equivalents of Ligand A/rhodium. The reactor was sealed, pressurized to 50 psi 1: 1 CO/H2 and heated to 95 °C for 3 hours. The reactor was cooled and depressurized and a sample of the reaction mixture was analyzed by gas chromatography on an HP 5890A Chromatograph with a Quadrics 23 fused silica capillary column (30 meters, 0. 32 mm I. D., 0.25 um film thickness) purchased from the Quadrex Corporation. GC analysis: conversion of pentenenitriles : 69%; selectivity to 5-formylvaleronitrile : 77% on a mole basis; linearity of aldehydes produced: 94%.

Example 36 Hvdroformvlation of 3PN using Ligand B In the drybox was prepared a solution containing 3-pentenenitrile (0.5 M), Rh (acac) (CO) 2 (0.9 mM), and 1,2-dichlorobenzene (internal standard, 0.14 M) in toluene. A portion of this solution was added to a glass-lined pressure vessel and enough of a solution of the ligand (0.05 M) in toluene was added to give 2. 7 equivalents of Ligand B/Rh. The reactor was sealed, pressurized to 55 psi 1: 1 CO/H2 and heated to 95 °C for 3 hours. The reactor was cooled and depressurized and a sample of the reaction mixture was analyzed by gas chromatography on an HP 5890A Chromatograph with a Quadrex 23 fused silica capillary column (30 meters, 0.32 mm I. D., 0.25 um film thickness) purchased from the Quadrex Corporation. GC analysis: conversion :of pentenenitriles 94.7%; selectivity to 5-formylvaleronitrile : 60% on a mole basis; linearity of aldehydes produced: 73%.

Example 37 Hydroformylation of 3PN using Ligand C In the drybox was prepared 25 mL of a solution containing Rh (acac) (CO) 2 (2.4 mM) and Ligand C (6.8 mM), and triphenylphosphine oxide (internal standard, 2.1 mM) in toluene. This solution was loaded into a 100 mL Parr autoclave under a stream of H2/CO. The autoclave was charged to 65 psi with 1: 1 H2/CO and heated to 95°C. Once the temperature had stabilized, 10.0 mL of a solution of 3-pentenenitrile (3.5 M) and o-dichlorobenzene (1.0 M, internal standard) in toluene was added via a high pressure syringe pump (Isco Series 260 D) over 1 minute. Then a continuous flow of 1: 1 H2/CO (approximately 30

cc/min) was provided to the reactor, maintaining a pressure of 65 psi. T mixture was stirred at approximately 900 rpm with an air-driven rotary stirrer for 80 minutes. Samples were withdrawn via a needle valve and analyzed by gas chromatography on an HP 5890A Chromatograph with a Quadrex 23 fused silica capillary column (30 meters, 0.32 mm I. D., 0.25 um film thickness) purchased from the Quadrex Corporation. After 80 minutes, GC analysis indicated conversion of pentenenitriles : 100%; selectivity to 5-formylvaleronitrile : 78% on a mole basis; linearity of aldehydes produced: 92%.

Example 38 Hvdroformvlation of 3PN usine Ligand J 0.203 g Rh (CO) 2 (acac), 32.4 g 3PN and, 4.0 g 1,2-dichlorobenzene were mixed, and then toluene was added to make a stock solution of 400 mL total volume. 64 mg of Ligand J and 5 mL of the stock solution (ratio of P/Rh : 5 : 1) were mixed and put into a glass vial. This mixture was heated to 95 °C under 75 psi (1: 1 H2: CO) for 3 hours. A sample was analyzed by gas chromatography on an HP 5890A Chromatograph with a Quadrex 23 fused silica capillary column (30 meters, 0.32 mm I. D., 0.25 um film thickness) purchased from the Quadrex Corporation. GC analysis indicated conversion of pentenenitriles : 100%; selectivity to 5-formylvaleronitrile : 75% on a mole basis; linearity of aldehydes produced: 95%.

Example 39 Hydroformvlation of M3P usinz Ligand J In the drybox was prepared a solution containing methyl-3-pentenoate (M3P) (0.5 M), Rh (acac) (CO) 2 (0.9 mM), and 1,2-dichlorobenzene (internal standard, 0. 14 M) in toluene. A portion of this solution was added to a glass-lined pressure vessel and enough of a solution of the ligand (0.05 M) in toluene was added to give 4.6 equivalents of Ligand J/Rh. The reactor was sealed, pressurized to 55 psi 1: 1 CO/H2 and heated to 95 °C for 3 hours. The reactor was cooled and depressurized and a sample of the reaction mixture was analyzed by gas chromatography on an HP 5890A Chromatograph with a DB- FFAP fused silica capillary column (30 meters, 0.32 mm I. D., 0.25 um film thickness) purchased from JW Scientific. Conversion of methyl-3-pentenoate:

84% ; se. xtivity to methyl-5-formylvalerate : 78% on a mole basis; linearity of aldehydes produced: 98. 8%.

Example 40 Hydroformylation of 3PN using Ligand M 20.25 g 3PN, 0.125 g Rh (CO) 2 (acac), and 2.5 g 1,2-dichlorobenzene were mixed to make a stock solution. Take 0.4575g (0.503 mL) of this stock solution to 10 mg of ligand M. No toluene added. Run same condition as above. (P: Rh: 2.5). A sample was analyzed by gas chromatography on an HP 5890A Chromatograph with a Quadrex 23 fused silica capillary column (30 meters, 0. 32 mm I. D., 0.25 um film thickness) purchased from the Quadrex Corporation. GC analysis indicated conversion of pentenenitriles : 85%; selectivity to 5- formylvaleronitrile: 55%; linearity of aldehydes produced: 65%.

Example 41 Hvdroformvlation of Methvl-3-Pentenoate (M3P) using Ligand M In the drybox was prepared a solution containing methyl-3-pentenoate (0. 5 M), Rh (acac) (CO) 2 (0.9 mM), and 1,2-dichlorobenzene (internal standard, 0. 14 M) in toluene. A portion of this solution was added to a glass-lined pressure vessel and enough of a solution of the ligand (0.05 M) in toluene was added to give 2.5 equivalents of Ligand M/Rh. The reactor was sealed, pressurized to 55 psi 1: 1 CO/H2 and heated to 95 °C for 3 hours. The reactor was cooled and depressurized and a sample of the reaction mixture was analyzed by gas chromatography on an HP 5890A Chromatograph with a DB-FFAP fused silica capillary column (30 meters, 0.32 mm I. D., 0.25 um film thickness) purchased from JW Scientific. Conversion of methyl-3-pentenoate: 74%; selectivity to methyl-5-formylvalerate : 57% on a mole basis; linearity of aldehydes produced: 70%.

Example 42-53 Hvdroformylation of 3PN using Ligands D through I, and K. L. N. P.

X. and Y Example 36 was repeated with Ligands D through I, and K, L, N, P, X, and Y. The results are given in Table 1 below.

Table 1. Hvdroformvlation of 3-pentenenitrile bv the above method <BR> <BR> Example Ligand Conv Sel Lin UM<BR> 42 D 98 70 86 5. 0 43 E 96 41 48 1. 6 44 F 89 83 98 5. 5 45 G 89 83 98 5. 5 46 H 93 80 98 5. 5 47 1 83 45 58 5. 4 48 K 91 74 96 5. 6 49 L 85 61 81 5. 0 50 N 66 39 48 5. 5 51 P 90 61 75 2. 8 52 X 66 71 82 6. 0 53 Y 80 53 64 6. 0 EXAMPLE 54 Gas-Phase Hvdroformvlation of Propvlene Using Ligand O An empty 0.25-inch (0.64 cm) diameter, 15-inch (37.5 cm) long stainless steel tubular reactor was placed in a nitrogen-filled drybox. A plug of glass wool was placed in the bottom end of the reactor, followed by 3 g of catalyst. A thermocouple was inserted into the top of the reactor. Both ends of the reactor were sealed by valves, and the reactor was removed from the drybox and was connected to stainless steel reactor feed lines purged with nitrogen. The reactor was equipped with a by-pass line to allow for a flow of CO and H2 to be

established before opening the inlet side of the reactor to the feed gases. The desired temperature of 100°C was established in the reactor by means of a split tube furnace surrounding the reactor. When the desired temperature and flow rates of 2cc/min CO and 2cc/min H2 feed gases had been achieved, a valve was turned to begin passing CO and H2 over the catalyst. Periodically, at times shown in Table 2, reactor effluent samples were analyzed by gas chromatography for the amounts of unreacted propylene, linear and branched butyraldehyde.

Table 2 shows the g of catalyst and the wt% of phosphorus in the catalyst used. The mole ratio of Rh/P shown in Table 2 is the ratio used to complex Rh to the catalyst from a solution of Rh (acac) (CO) 2 in toluene. The TON/hr numbers shown in Table 2 were calculated to represent the moles of propylene reacted per mole of Rh per hour.

TABLE 2 Gas Phase Propylene/CO/H2 Reactions Catalyst Propene/CO/H2 Elapsed Propylene Linear/ ligand g, % P, Rh/P cc/min. Time, hr % Conv. Branched TON/hr O 3.0,0.08,0.5 2,2,2 3.1 78.0 106 9.5 80.6 >29 131 32.8 78.4 68.5 104 38.8 81.9 68. 3 131 50.3 81.7 68.5 103 53.3 78.8 67.0 131 EXAMPLE 55 Hvdroformvlationof 3PN using a polvmer supported catalvst-Ligand O A 100 mL autoclave equipped with a sampling line connected to a sintered frit was charged with 1. 32 g of Ligand Q. The autoclave was evacuated and a

solution cor+aining 0.048 g of Rh (acac) (CO) 2 in 50 g of 3-pentenenitrile was loaded under vacuum. The mixture was stirred for 5 minutes and the liquid was removed from the autoclave via the sampling line by applying pressure. The solid remaining in the autoclave was rinsed with 3 portions of 50 ml of 3-pentenenitrile each following the same procedure. A solution containing 70 g of 3-pentenenitrile and 2 g of ortho-dichlorobenzene was loaded into the autoclave.

The autoclave was pressurized with 65 psi CO/H2 (1: 1), heated at 95 °C under vigorous stirring for 4 hours while flowing CO/H2 at a rate of 20 mL/min for 4 hours. A sample was removed from the reactor after 4 hours and analyzed by GC (mole%): 2PN 2.4 %, VN 18.8%, 3PN 5.6%, 5FVN 68.1%. 3PN conversion 94%, 5FVN selectivity 74%, aldehyde linearity 94. 4%.

EXAMPLE 56 Hvdroformvlation of 3-Pentenenitrile using Ligand R A solution containing 0.2536 g of Ligand R, 0.018 g of Rh (acac) (CO) 2, 1 g of 1,2-dichlorobenzene and 30 g of 3-pentenenitrile was loaded into a 100 mL autoclave and heated with vigorous stirring under 65 psi CO/H2 (1: 1) while flowing CO/H2 at a rate of approximately 30 mL/min at 95°C for 4.5 hours. The reactor was cooled and depressurized, and a sample of the reaction mixture was analyzed by gas chromatography on an HP 5890A Chromatograph with a Quadrex 23 fused silica capillary column (30 meters, 0.32 mm I. D., 0.25 um film thickness) purchased from the Quadrex Corporation. GC analysis: 2-pentenenitrile 1.3%, valeronitrile 10.0%, 3-pentenenitrile 5.1%, 5-formylvaleronitrile 66. 8%.

Conversion of pentenenitriles : 95%; selectivity to 5-formylvaleronitrile : 71% on a mole basis; linearity of aldehydes produced: 80 %.

EXAMPLE 57 Hvdroformvlation of 3-Pentenenitrile usinbg Ligand S The reaction was run as in example 56, but with 3.1 equivalents of Ligand S/Rh, for 5 hours. GC analysis: 2-pentenenitrile 0. 1%, valeronitrile 17.9%, 3- pentenenitrile 0. 1%, 5-formylvaleronitrile 58. 7%. Conversion :of pentenenitriles 100%; selectivity to 5-formylvaleronitrile : 59% on a mole basis; linearity of aldehydes produced: 72 %.

EXAMPLE 58 Hvdroformylation of 1-octene using Ligand S In the drybox was prepared a solution containing 1-octene (0. 89 M), Rh (acac) (CO) 2 (5.9 mM), and Ligand S (25 mM) in toluene. 1 mL of this solution was heated at 80°C under 100 psi of CO/H2 (1/1) for lhr. Butyl ether (2. 5mg, 0.02mmole) was added into the mixture as the internal standard and the mixture was analyzed by gas chromatography (GC) with a Chrompack CP-SIL 8 column (30m x 0.32mm ID). (mole%) 7.3% octane, 14.3% internal octenes, 14.4% 2-methyl octanal, 4.0% other branched aldehydes, and 52.3% nonanal.

Conversion of 1-octene : 100%; selectivity to nonanal: 57% ; linearity of aldehydes produced: 74%).

EXAMPLE 59 Hydroformvlation of 3-Pentenenitrile using Lizand T The reaction was run as in example 56, but with 5.9 equivalents of Ligand T/Rh. GC analysis: (mole %) 2-pentenenitrile 18.5%, valeronitrile 6.5%, 3- pentenenitrile 42.0%, 5-formylvaleronitrile 23.6%. Conversion of pentenenitriles: 54%; selectivity to 5-formylvaleronitrile : 44% on a mole basis; linearity of aldehydes produced: 83%.

EXAMPLE 60 Hvdroformvlation of 1-octene using Ligand U The reaction was run as in example 58, but with Ligand U. GC analysis: (mole%) 3.8% octane, 31. 0% internal octenes, 5.9% 2-methyl octanal, and 46. 1% nonanal. Conversion of 1-octene : 100%; selectivity to nonanal: 53% ; linearity of aldehydes produced: 89%).

EXAMPLE 61 Hvdroformvlation of 1-octene using Ligand V The reaction was run as in example 58, but with Ligand V. GC analysis: (mole%) 6.5% octane, 28. 3% internal octenes, 7.0% 2-methyl octanal, and 50. 4% nonanal. Conversion of 1-octene : 100%; selectivity to nonanal: 55%; linearity of aldehydes produced: 88%).

EXAMPLE 62 Hvdroformvlation of Methvl-3-Pentenoate using lieand W A solution containing 0.2600 g ligand W, 0. 018 g of Rh (acac) (CO) 2, 1 g of ortho-dichlorobenzene and 30 g of methyl 3-pentenoate was loaded into a 100 mL autoclave and heated with vigorous stirring under 55 psi CO/H2 (1 : 1) while flowing CO/H2 at a rate of approximately 30 mL/min at 95°C for 6.5 hours. The reactor was cooled and depressurized, and a sample of the reaction mixture was analyzed by gas chromatography on an HP 5890A Chromatograph with a DB- FFAP fused silica capillary column (30 meters, 0.32 mm I. D., 0.25 um film thickness) purchased from JW Scientific. Conversion :of methyl-3-pentenoate 100%; selectivity to methyl 5-formylvalerate : 92% on a mole basis; linearity of aldehydes produced: 98%.

COMPARATIVE EXAMPLE A-1 Hvdroformvlation of 3-pentenenitrile using Ligand Z The procedure of Example 36 was followed for ligand Z. The data in Table 3 indicate that ligands C and P give higher selectivity to the desired product than ligand Z.

Table 3. Hvdroformvlation of 3-pentenenitrile Ligand Conv Sel Lin L/M C 1 00 80 93 5. 0 P 91 74 96 5. 6 Z 70 45 58 5. 0 COMPARATIVE EXAMPLE B-1 Hvdroformvlation of 3-pentenenitrile usinnd AA The procedure of Example 36was followed for ligand AA. The data in Table 4 indicate that ligands A and K give higher selectivity to the desired product than ligand AA.

Table 4. Hydroformylatio@ of 3-pentenenitrile Ligand Conv Sel Lin L/M A 69 77 94 10 K 90 61 75 2. 8 AA 80 52 64 2. 7