SANDIN HELENA
| WO1998056771A2 | 1998-12-17 | |||
| WO2002014313A2 | 2002-02-21 | |||
| WO2004037796A2 | 2004-05-06 |
| US4742062A | 1988-05-03 | |||
| US4368199A | 1983-01-11 | |||
| US4616086A | 1986-10-07 | |||
| EP0707004A1 | 1996-04-17 |
| 1. | Compounds of formula (1) (I) wherein: the double bond in the amide moiety of formula (I) has an Econfiguration ; X is a fluorine or a chlorine atom ; the methyl groups located at the 2and 5position of the piperazine ring are in trans configuration to each other ; R'represents : a) an aromatic group represented by the formula : wherein: R2 is a substituent with a svalue between 0.5 and 0.9 and a molrefractoryvalue (MR) between 5.0 and 9.0 such as methyl, chloro, bromo, trifluoromethyl, or R is a nitro or methoxy substituent; R3 is selected from hydrogen, chloro, bromo, methyl, trifluoromethyl, methoxy and nitro, with the provisos that if R2 is methoxy, R3 is methoxy, and if R2 is nitro, R3 is hydrogen, chloro, methyl or trifluoromethyl ; R is selected from hydrogen and methoxy, with the provisos that if R2 is methoxy, R4 isselected from a group consisting of hydrogen, chloro, bromo or methoxy, or, if R3 is hydrogen, R4 is hydrogen; R is hydrogen, chloro, methyl, with the proviso that if R5 is chloro or methyl, X is fluoro, R2 is chloro or methyl and R3 is hydrogen; b) a heteroaromatic group represented by the formula : wherein: Y is 0 or S ; R6 is one or more substituents independently selected from hydrogen, halo, C1C4 alkyl, C2 C4 alkenyl, C2C4 alkynyl, haloalkyl, alkoxy, haloalkoxy, hydroxyalkyl, hydroxy, alkylthio, alkylsulfonyl, alkylsulfìnyl, nitro, cyano, alkylamino, aryl, amino, alkylsulfonylamino, dialkylsulfonamido, sulfonamido, carboxy, alkylcarbonyl, alkoxycarbonylalkyl, aminocarbonyl, monoalkylaminocarbonyl, dialkylaminocarbonyl, ureido and heteroaryl ; c) a heteroaromatic group represented by the formula : wherein: R is one or more substituents independently selected from hydrogen, halo, C1C4 alkyl, C2 C4 alkenyl, C2C4 alkynyl, haloalkyl, alkoxy, haloalkoxy, hydroxyalkyl, hydroxy, alkylthio, alkylsulfonyl, alkylsulfinyl, nitro, cyano, alkylamino, aryl, amino, alkylsulfonylamino, dialkylsulfonamido, sulfonamido, carboxy, alkylcarbonyl, alkoxycarbonylalkyl, aminocarbonyl, monoalkylaminocarbonyl, dialkylaminocarbonyl, ureido and heteroaryl; or a pharmaceutically acceptable salt or solvate thereof 2. |
| 2. | Compounds according to claim 1 wherein: R1 represents : a) an aromatic group represented by the formula : wherein: R2 is selected from methyl, chloro, bromo, trifluoromethyl, nitro and methoxy ; R3 is selected from hydrogen, chloro, bromo, methyl, trifluoromethyl, methoxy and nitro, with the provisos that if R2 is methoxy, R3 is methoxy, and if R2 is nitro, R3 is hydrogen, chloro, methyl or trifluoromethyl; R4 is selected from hydrogen and methoxy, with the provisos that if R2 is methoxy, R4 isselected from a group consisting of hydrogen, chloro, bromo or methoxy, or, if R3 is hydrogen, R4 is hydrogen; R is hydrogen, chloro, methyl, with the proviso that if R5 is chloro or methyl, X is fluoro, R2 is chloro or methyl and R3 is hydrogen; b) a heteroaromatic group represented by the formula : wherein: R6 is one or more substituents independently selected from hydrogen, halo, methyl, ethyl, haloalkyl, alkoxy, haloalkoxy and nitro; c) a heteroaromatic group represented by the formula: wherein: R is one or more substituents independently selected from hydrogen, halo, C1C3 alkyl, haloalkyl, alkoxy, haloalkoxy, nitro, cyano, alkylamino, aryl, alkylcarbonyl, aminocarbonyl; or a pharmaceutically acceptable salt or solvate thereof. |
| 3. | Compounds according to any of claims 12 wherein X is fluorine. |
| 4. | A compound according to any of claims 13 which is: (E) (trans)3 (4Bromophenyl) 1 [4 (4fluorobenzyl)2, 5dimethylpiperazine 1yl]prop2<BR> en1one ; (E) (trans)3 (4Chloro3nitrophenyl)1 [4 (4chlorobenzyl)2, 5dimethylpiperazine1 yl]prop2en1one ; (E) (trans)3 (3, 4Dichlorophenyl) I [4 (4fluorobenzyl)2, 5dimethylpiperazine 1yl] prop2en1one ; (E)(trans)3(2,4Dichlorophenyl)1[4(4fluorobenzyl)2,5dimethylpiperazine1yl] prop2en1one hydrochloride; (E)(trans)1[4(4Chlorobenzyl)2,5dimethylpiperazine1yl]3(4chlorophenyl)prop 2en1one ; (E) (trans)3Benzo [2, 1, 3] thiadiazol5yll [4 (4fluorobenzyl)2, 5dimethylpiperazinel yl]prop2en1one ; (E) (trans)3 (4Chloro3methoxy5nitrophenyl)1 [4 (4fluorobenzyl)2, 5dimethyl piperazine1yl]prop2en1one ; (E)(trans)3(4Chloro3methoxyphenyl)1[4(4fluorobenzyl)2,5dimethylpiperazine 1yl]prop2en1one ; (E) (trans)3 (4Bromo3, 5dimethoxyphenyl)1 [4 (4fluorobenzyl)2, 5dimethyl piperazine1yl]prop2en1one ; (E)(trans)1[4(4Fluorobenzyl)2,5dimethylpiperazine1yl]3(3methoxy4methyl phenyl)prop2en1one ; <BR> <BR> <BR> <BR> (E) (trans)3 (4Bromophenyl)1 [4 (4chlorobenzyl)2, 5dimethylpiperazine1yl]prop2 enlone ; <BR> <BR> <BR> <BR> (E) (trans)3 (3Bromo4chlorophenyl)I [4 (4fluorobenzyl)2, 5dimethylpiperazine 1 yl]prop2en1one ; (E)(trans)3(4Bromo3chlorophenyl)1[4(4fluorobenzyl)2,5dimethylpiperazine1 yl]prop2en1one ; (E)(trans)3(3,4Dibromophenyl)1[4(4fluorobenzyl)2,5dimethylpiperazine1yl] prop2en1one ; <BR> <BR> <BR> <BR> <BR> (E) (trans)3 (4Bromo3nitrophenyl)I [4 (4fluorobenzyl)2, 5ditnethylpiperazine Iyl] prop2en1one ; (E) (trans)3 (4Bromobenzo [2,1, 3] thiadiazol6yl)1 [4 (4fluorobenzyl)2, 5dimethyl piperazine1yl]prop2en1one ; (E) (trans)3 (4Chlorobenzo [2, 1, 3] thiadiazol6yl)1 [4 (4fluorobenzyl)2, 5dimethyl piperazine1yl]prop2en1one ; (E) (trans)1 [4 (4Fluorobenzyl)2, 5dimethylpiperazine1yl]3 (4nitro benzo [2, 1, 3] thiadiazol5yl)prop2en1one ; (E)(trans)3(4Chlorophenyl)1[4(4fluorobenzyl)2,5dimethylpiperazine1yl]prop 2en1one ; or <BR> <BR> <BR> <BR> <BR> (E) (trans)3 (4Chloro3nitrophenyl)1 [4 (4fluorobenzyl)2, 5dimethylpiperazine1<BR> <BR> <BR> <BR> yl]prop2en1one. |
| 5. | A process for the preparation of a compound of formula (I) by treating a piperazine derivative of formula M with a compound of formula (V), wherein Ll is a leaving group, in an organic solvent, at a temperature of 0"C to 120 °C. |
| 6. | A composition comprising a therapeutically effective amount of a compound of formula (I) (1) wherein: the double bond in the amide moiety of formula (1) has an Econfiguration ; X is a fluorine or a chlorine atom ; the methyl groups located at the 2and 5position of the piperazine ring are in trans configuration to each other; R'represents : b) an aromatic group represented by the formula : wherein: R is a substituent with a #value between 0.5 and 0.9 and a molrefractoryvalue (MR) between 5.0 and 9.0 such as methyl, chloro, bromo, trifluoromethyl, or R is a nitro or methoxy substituent; R3 is selected from hydrogen, chloro, bromo, methyl, trifluoromethyl, methoxy and nitro, with the provisos that if R2 is methoxy, R3 is methoxy, and if R2 is nitro, R3 is hydrogen, chloro, methyl or trifluoromethyl ; R4 is selected from hydrogen and methoxy, with the provisos that if R2 is methoxy, R4 isselected from a group consisting of hydrogen, chloro, bromo or methoxy, or, if R3 is hydrogen, R4 is hydrogen; R is hydrogen, chloro, methyl, with the proviso that if R5 is chloro or methyl, X is fluoro, R2 is chloro or methyl and R3 is hydrogen; b) a heteroaromatic group represented by the formula : wherein: YisOorS ; R6 is one or more substituents independently selected from hydrogen, halo, C1C4 alkyl, C2 C4 alkenyl, C2C4 alkynyl, haloalkyl, alkoxy, haloalkoxy, hydroxyalkyl, hydroxy, alkylthio, alkylsulfonyl, alkylsulfinyl, nitro, cyano, alkylamino, aryl, amino, alkylsulfonylamino, dialkylsulfonamido, sulfonamido, carboxy, alkylcarbonyl, alkoxycarbonylalkyl, aminocarbonyl, monoalkylaminocarbonyl, dialkylaminocarbonyl, ureido and heteroaryl; c) a heteroaromatic group represented by the formula: wherein: R7 is one or more substituents independently selected from hydrogen, halo, C1C4 alkyl, C2 C4 alkenyl, C2C4 alkynyl, haloalkyl, alkoxy, haloalkoxy, hydroxyalkyl, hydroxy, alkylthio, alkylsulfonyl, alkylsulfinyl, nitro, cyano, alkylamino, aryl, amino, alkylsulfonylamino, dialkylsulfonamido, sulfonamido, carboxy, alkylcarbonyl, alkoxycarbonylalkyl, aminocarbonyl, monoalkylaminocarbonyl, dialkylaminocarbonyl, ureido and heteroaryl ; or a pharmaceutically acceptable salt or solvate thereof and pharmaceutically acceptable constituents, for use as a medicament. |
| 7. | Composition according to claim 6 further comprising a subnephrotoxic amount of cyclosporin A. |
| 8. | Use of a compound according to claim 1 to 4 for the manufacturing of a drug for the treatment of inflammatory, autoimmune, proliferative or hyperproliferative diseases. |
| 9. | Use according to claim 8 wherein the drug is for the treatment of rheumatoid arthritis, multiple sclerosis, systemic lupus erythematosus, inflammatory bowel disease, allograft rejection or asthma. |
Another aspect of the invention is a method of treating inflammatory, autoimmune, proliferative and hyperproliferative diseases. A preferred method is the method of treating rheumatoid arthritis, atherosclerosis, systemic sclerosis, multiple sclerosis, Alzheimer's disease, encephalomyelitis, systemic lupus erythematosus, Guillian-Barre syndrome, allograft rejection, urticaria, angioderma, allergic conjunctivitis, atopic dermatitis, allergic contact dermatitis, drug or insect sting allergy, systemic anaphylaxis, proctitis, inflammatory bowel disease or asthma.
Background Chemokines are small secreted cytokines consisting of 8-14 kDa proteins, which can be classified into four groups according to the sequence of their conserved cysteine residues, CXC, CC, C and CX3C. They promote upregulation of cellular adhesion molecules, which enforces adhesion and lead to cell migration. Hence, the chemotactic cytokines play a crucial part in the recruitment and trafficking of leukocyte subsets.
Among the CC chemokines, MIP-la and RANTES, known as ligands for CCR1, CCR3, CCR4 and CCR5 receptors, are involved in autoimmune diseases such as rheumatoid arthritis, inflammatory bowel disease and multiple sclerosis. This is strongly supported by the fact that CCR1 knockout mice show a significantly reduced incidence of disease in a mouse EAE model compared with the wild type mice. Studies by Karpus et al. (J. Immunol. 1995,155, 5003) further prove the pivotal role of MIl'-1 a in the same model of multiple sclerosis. It was shown that antibodies to MIP-loc prevented the development of both acute and relapsing paralytic disease as well as infiltration of mononuclear cells into the CNS.
In addition, there is strong evidence implicating RANTES in the pathophysiology of rheumatoid arthritits. For example, RANTES mRNA was detected in synovial tissue samples from patients with rheumatoid arthritis (Snowden, N. et al., Lancet, 1994,343, 547). Further, antibodies to RANTES greatly reduced the development of disease in an adjuvant-induced arthritis model in the rat.
A number of studies have provided evidence for a role of CCR1 in allograft rejection.
Combining a sub-nephrotoxic amount of cyclosporin A with blockade of chemokine receptors using a CCR1 antagonist has been shown to have a positive effect on solid allograft survival (Horuk, R. et al. , J. Biol. Chem. 2001,276, 4199).
Therefore, molecules that inhibit the interaction between the inflammatory chemokines and their receptor would be beneficial in the treatment of inflammatory, autoimmune, proliferative and hyperproliferative diseases.
Related Disclosures The U. S. Patent No. 4,368, 199 discloses piperazinyl substituted cinnamic amides as being useful in the treatment of heart diseases. The focus of this patent application lies on 3,4, 5- trimethoxycinnamoylpiperazine derivatives, which are N-substituted with variously arylated alkyl-spacers. The most common spacer length consists of two C-units. The international patent application WO 98/56771 claims benzylated piperazines useful in the treatment of inflammatory disorders by inhibition of the activity of chemokines. Examples of the most preferred compounds are summarised in Table 1.
Table 1. Structure X Y Z R N O F, Cl 0 glycinamido, ureido, O aminocarbonyl Y cri aminocarbonyl, ureido, Ny, N F glycinamido, H 0 aminocarbonyl, ureido, CHRRH glycinamido, H Footnote: All 2,5-dimethylpiperazine derivatives have been synthesized and tested as racemic mixtures.
One benzylcinnamoyl-piperazine derivative, 1- (4-chlorobenzyl)-4- (2, 4-dichlorocinnamoyl) - piperazine, is published in the U. S. Patent No 4,742, 062 in the synthesis of remedies against hyperlipidemia.
The U. S. Patent No 4,616, 086 discloses 1-cirmamoyl-piperazine-4-yl-methylbenzoic acid derivatives and esters thereof as drugs against hyperlipidemia.
Caignard et al. (Eur. J. Med. Chem. 2000, 35, 107) publishes certain cinnamic amides of benzylpiperazine with low affinity to the o-site.
Description of the invention It has now surprisingly been found that the compounds of formula (I) (1) wherein: the double bond in the amide moiety of formula (I) has an E-configuration ; X is a fluorine or a chlorine atom ; the methyl groups located at the 2-and 5-position of the piperazine ring are in trans- configuration to each other ; R'represents : a) an aromatic group represented by the formula : wherein: R2 is a substituent with a s-value between 0.5 and 0.9 and a molrefractory-value (MR) between 5.0 and 9.0 such as methyl, chloro, bromo, trifluoromethyl, or R2 is a nitro or methoxy substituent; R3 is selected from hydrogen, chloro, bromo, methyl, trifluoromethyl, methoxy and nitro, with the provisos that if R2 is methoxy, R3 is methoxy, and if R2 is nitro, R3 is hydrogen, chloro, methyl or trifluoromethyl ; R4 is selected from hydrogen and methoxy, with the provisos that if R2 is methoxy, R4 is selected from a group consisting of hydrogen, chloro, bromo or methoxy, or, if R3 is hydrogen, R4 is hydrogen; RS is hydrogen, chloro, methyl, with the proviso that if R5 is chloro or methyl, X is fluoro, R2 is chloro or methyl and R3 is hydrogen; b) a heteroaromatic group represented by the formula : wherein: Y is 0 or S ; R6 is one or more substituents independently selected from hydrogen, halo, C1-C4 alkyl, C2- C4 alkenyl, C2-C4 alkynyl, haloalkyl, alkoxy, haloalkoxy, hydroxyalkyl, hydroxy, alkylthio, alkylsulfonyl, alkylsulfinyl, nitro, cyano, alkylamino, aryl, amino, alkylsulfonylamino, dialkylsulfonamido, sulfonamido, carboxy, alkylcarbonyl, alkoxycarbonylalkyl, aminocarbonyl, monoalkylaminocarbonyl, dialkylaminocarbonyl, ureido and heteroaryl; c) a heteroaromatic group represented by the formula : wherein: R is one or more substituents independently selected from hydrogen, halo, C1-C4 alkyl, C2- C4 alkenyl, C2-C4 alkynyl, haloalkyl, alkoxy, haloalkoxy, hydroxyalkyl, hydroxy, alkylthio, alkylsulfonyl, alkylsulfinyl, nitro, cyano, alkylamino, aryl, amino, alkylsulfonylamino, dialkylsulfonamido, sulfonamido, carboxy, alkylcarbonyl, alkoxycarbonylalkyl, aminocarbonyl, monoalkylaminocarbonyl, dialkylaminocarbonyl, ureido and heteroaryl; or a pharmaceutically acceptable salt or solvate thereof ; are unexpectedly effective in inhibiting the signalling of the chemokine receptor CCR1.
A preferred group of compounds of formula (I) is that group of compounds wherein: R'represents : a) an aromatic group represented by the formula: wherein: R is selected from methyl, chloro, bromo, trifluoromethyl, nitro and methoxy; R3 is selected from hydrogen, chloro, bromo, methyl, trifluoromethyl, methoxy and nitro, with the provisos that if R2 is methoxy, R3 is methoxy, and if R2 is nitro, R3 is hydrogen, chloro, methyl or trifluoromethyl; R4 is selected from hydrogen and methoxy, with the provisos that if R2 is methoxy, R4 is selected from a group consisting of hydrogen, chloro, bromo or methoxy, or, if R3 is hydrogen, R4 is hydrogen; R is hydrogen, chloro, methyl, with the proviso that if R5 is chloro or methyl, X is fluoro, R2 is chloro or methyl and R3 is hydrogen; b) a heteroaromatic group represented by the formula : wherein: R6 is one or more substituents independently selected from hydrogen, halo, methyl, ethyl, haloalkyl, alkoxy, haloalkoxy and nitro; c) a heteroaromatic group represented by the formula : wherein: R7 is one or more substituents independently selected from hydrogen, halo, C 1-C3 alkyl, haloalkyl, alkoxy, haloalkoxy, nitro, cyano, alkylamino, aryl, alkylcarbonyl, aminocarbonyl; or a pharmaceutically acceptable salt or solvate thereof Preferred compounds are : (E)- (trans)-3- (4-Bromo-phenyl)-l- [4- (4-fluoro-benzyl)-2, 5-diinethyl-piperazine-l-yl]-prop-2- en-l-one <BR> <BR> (E)- (trans)-3- (4-Chloro-3-nitro-phenyl)-1- [4- (4-chloro-benzyl)-2, 5-dimethyl-piperazine-1-<BR> yl]-prop-2-en-1-one<BR> <BR> (E)- (trans)-3- (3, 4-Dichloro-phenyl)-1- [4- (4-fluoro-benzyl)-2, 5-dimethyl-piperazine-1-yl]-<BR> prop-2-en-1-one<BR> <BR> (E)- (trans)-1- [4- (4-Fluoro-benzyl)-2, 5-dimethyl-piperazine-1-yl]-3-p-tolyl-prop-2-en-1-one<BR& gt; <BR> (E)- (trans)-I- [4- (4-Fluoro-benzyl)-2, 5-dimethyl-piperazine-1-yl]-3- (4-nitro-phenyl)-prop-2- en-l-one (E)-(trans)-3-(2,4-Dichloro-phenyl)-1-[4-(4-fluoro-benzyl)-2 ,5-dimethyl-piperazine-1-yl]- prop-2-en-1-one hydrochloride (E)- (trans)-3-Benzo [b] thiophen-3-yl-l- [4- (4-fluoro-benzyl)-2, 5-dimethyl-piperazine-1-yl]- prop-2-en-1-one (E)-(trans)-3-(3,4-Dichloro-phenyl)-1-[4-(4-chloro-benzyl)-2 ,5-dimethyl-piperazine-1-yl]- <BR> <BR> <BR> prop-2-en-1-one<BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> (E)- (trans)-3- (3, 4-Dimethoxy-phenyl)-1- [4- (4-fluoro-benzyl)-2, 5-dimethyl-piperazine-1-yl]-<BR> <BR> <BR> <BR> <BR> prop-2-en-l-one<BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> (E)- (trans)-3- (3-Bromo-4, 5-dimethoxy-phenyl)-1- [4- (4-fluoro-benzyl)-2, 5-dimethyl-<BR> <BR> <BR> <BR> <BR> piperazine-1-yl]-prop-2-en-1-one (E)- (trans)-3- (4-Chloro-3-trifluoromethyl-phenyl)- 1- [4- (4-fluoro-benzyl)-2, 5-dimethyl- piperazine-1-yl]-prop-2-en-1-one (E)- (trans)-3-Benzo [2, 1, 3] oxadiazol-5-yl-1-[4-(4-fluoro-benzyl)-2,5-dimethyl-piperazin e-1- yl]-prop-2-en-1-one (E)-(trans)-3-(2,4-Dimethyl-phenyl)-1-[4-(4-fluoro-benzyl)-2 ,5-dimethyl-piperazine-1-yl]- prop-2-en-1-one (E)-(trans)-1-[4-(4-Chloro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-(4-chloro-phenyl)-prop-2- en-1-one (E)-(trans)-1-[4-(4-Fluoro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-(4-methyl-3-nitro- phenyl)-prop-2-en-1-one (E)-(trans)-1-[4-(4-Chloro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-(4-methyl-3-nitro- phenyl)-prop-2-en-1-one (E)-(trans)-3-Benzo [2, 1, 3] thiadiazol-5-yl-1-[4-(4-fluoro-benzyl)-2,5-dimethyl-piperazi ne-1- yl]-prop-2-en-1-one (E)-(trans)-1-[4-(4-Fluoro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-(3, 4, 5-trimethoxy- phenyl)-prop-2-en-1-one (E)- (trans)-3- (3-Chloro-4-nitro-phenyl)-l- [4- (4-fluoro-benzyl)-2, 5-dimethyl-piperazine-1-yl]- prop-2-en-1-one (E)-(trans)-3-(4-Chloro-3-methoxy-5-nitro-phenyl)-1-[4-(4-fl uoro-benzyl)-2,5-dimethyl- <BR> <BR> <BR> piperazine-1-yl]-prop-2-en-1-one<BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> (E)- (tr-as)-l- [4- (4-Fluoro-benzyl)-2, 5-dimethyl-piperazine-1-yl]-3- (4-trifluoromethyl-<BR> <BR> <BR> <BR> <BR> phenyl)-prop-2-en-1-one<BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> (E)- (trans)-1- [4- (4-Fluoro-benzyl)-2, 5-dimethyl-piperazine-1-yl]-3- (3-trifluoromethyl-4-<BR> <BR> <BR> <BR> <BR> nitro-phenyl)-prop-2-en-1-one<BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> (E)- (trans)-3- (4-Chloro-3-methoxy-phenyl)-1- [4- (4-fluoro-benzyl)-2, 5-dimethyl-piperazine-<BR> <BR> <BR> <BR> <BR> 1-yl]-prop-2-en-1-one<BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> (E)- (trans)-3- (3-Chloro-4, 5-dimethoxy-phenyl)-1- [4- (4-fluorobenzyl)-2, 5-dimethyl-<BR> <BR> <BR> <BR> <BR> piperazine-1-yl]-prop-2-en-1-one (E)- (trans)-3- (4-Bromo-3, 5-dimethoxy-phenyl)-l- [4- (4-fluorobenzyl)-2, 5-dimethyl- piperazine-1-yl]-prop-2-en-1-one (E)-(trans)-1-[4-(4-Fluorobenzyl)-2,5-dimethyl-piperazine-1- yl]-3-(3-methoxy-4-methyl- phenyl)-prop-2-en-1-one (E)- (trans)-3- (4-Bromo-benzo [2, 1, 3] oxadiazol-6-yl)-1-[4-(4-fluorobenzyl)-2, 5-dimethyl- <BR> <BR> <BR> piperazine-1-yl]-prop-2-en-1-one<BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> (E)- (trans)-3- (4-Bromo-phenyl)-l- [4- (4-chlorobenzyl)-2, 5-dimethyl-piperazine-l-yl]-prop-2- en-l-one (E)-(trans)-1-[4-(4-Chlorobenzyl)-2,5-dimethyl-piperazine-1- yl]-3-(4-nitro-phenyl)-prop-2- en-l-one <BR> <BR> <BR> <BR> <BR> <BR> (E)- (trans)-3- (3-Bromo-4-chloro-phenyl)-1- [4- (4-fluorobenzyl)-2, 5-dimethyl-piperazine-1-<BR> <BR> <BR> <BR> <BR> yl]-prop-2-en-1-one (E)-(trans)-3-(4-Bromo-3-chloro-phenyl)-1-[4-(4-fluorobenzyl )-2,5-dimethyl-piperazine-1- <BR> <BR> <BR> yl]-prop-2-en-1-one<BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> (E)- (trans)-3- (3, 4-Dibromo-phenyl)-I- [4- (4-fluorobenzyl)-2, 5-dimethyl-piperazine-1-yl]-<BR> <BR> <BR> <BR> <BR> <BR> prop-2-en-1-one (E)-(trans)-3-(4-Bromo-3-nitro-phenyl)-1-[4-(4-fluorobenzyl) -2,5-dimethyl-piperazine-1-yl]- prop-2-en-1-one (E)-(trans)-3-(4-Chloro-benzo [2, 1, 3] oxadiazol-6-yl)-l- [4- (4-ftuorobenzyl)-2, 5-dimefhyl- piperazine-1-yl]-prop-2-en-1-one (E)-(trans)-3-(4-Bromo-benzo [2,1, 3] thiadiazol-6-yl)-1-[4-(4-fluorobenzyl)-2, 5-dimethyl- piperazine-1-yl]-prop-2-en-1-one (E)- (trans)-3- (4-Chloro-benzo [2, 1, 3] thiadiazol-6-yl)-l- [4- (4-fluorobenzyl)-2, 5-dimethyl- piperazine-1-yl]-prop-2-en-1-one (E)- (trans)-3- (4-Bromo-5-methoxy-benzo [2, 1, 3Wadiazol-6-yl)-I- [4- (4-fluorobenzyl)-2, 5- dimethyl-piperazine-1-yl]-prop-2-en-1-one (E)-(trans)-1-[4-(4-Fluoro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-(4-nitro- benzo [2,1, 3] thiadiazol-5-yl)-prop-2-en-1-one (E)-(trans)-3-(4-Chloro-phenyl)-1-[4-(4-fluoro-benzyl)-2,5-d imethyl-piperazine-1-yl]-prop-2- en-l-one (E)-(trans)-3-(4-Chloro-3-nitro-phenyl)-1-[4-(4-fluoro-benzy l)-2,5-dimethyl-piperazine-1-yl]- prop-2-en-1-one Examples of the preferred compounds of the invention in the above formula (I) have substituents as shown in the following Table 2.
Table 2. Compound No. X R 6. 1 F cri ci 5. 3 F -6-Cl CI 5. 6 F \/ N02 6. 2 F- ce Br 5. 39 F CF3 5. 12 F- -d-Cl OMe 5. 26 F N02 NOs 5. 22 F ci OMe 5. 1 F-0-Br NO2 5. 42 F--d7Br Definitions The term"therapy"and"treatment"as used herein includes prophylaxis as well as relieving the symptoms of disease.
In the context of the present specification, an alkyl, alkenyl or alkynyl substituent group or an alkyl, alkenyl or alkynyl moiety in a substituent group may be a branched or straight chain or cyclic. Further, a nitrogen atom may be monosubstituted or independently disubstituted with the same or different alkyl, alkenyl or alkynyl moieties.
Unless specified otherwise: "Alkyl"refers to a hydrocarbon group joined by single carbon-carbon bonds and having 1-4 carbon atoms, selected from methyl, ethyl, n-propyl, isopropyl, cyclopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl and cyclobutyl. The descriptors C-1 to C-4 refer to the number of carbon atoms present in the alkyl group.
"Alkenyl"refers to a hydrocarbon group comprising one double carbon-carbon bond and having 2-4 carbon atoms.
"Alkynyl"refers to a hydrocarbon group comprising one triple carbon-carbon bond and having 2-4 carbon atoms.
"Alkoxy"refers to the radical-ORA& wherein RALI, is alkyl as defined above.
"Halo"or"halogen"refers to fluoro, chloro, bromo or iodo.
"Haloalkyl"refers to an alkyl radical as defined above, that is substituted by one or more halo radicals, e. g. , trifluoromethyl, difluoromethyl, pentafluoroethyl, trichloromethyl and the like.
"Haloalkoxy"refers to radical or the formula-ORnai where RHal is a haloalkyl radical as defined above.
"Nitro"refers to the radical-NO2.
"Carboxy"refers to the radical-C (O) OH or-C (O) O-.
"Cyano"refers to the radical-CN.
CHC13 refers to chloroform.
CHsClx refers to dichloromethane.
"Hydroxy"refers to a radical-OH.
"Hydroxyalkyl"refers to an alkyl radical as defined above substituted by a hydroxy radical.
"Alkylthio"refers to a radical of the formula-S-RA where RA& is an alkyl radical as defined above.
"Alkylsulfonyl"refers to a radical of the formula-S (0) 2RAlk where RA& is an alkyl radical as defined above.
"Alkylsulfinyl"refers to a radical of the formula-S (O) RAlk where RAlk is an alkyl radical as defined above.
"Amino"refers to a radical of the formula -NH2.
"Alkylamino"refers to a radical of the formula-N (H) R where RA is an alkyl radical as defined above ; or-Na") 2 wherein RA& independently represents the same or different alkyl radicals as defined above.
"Aryl"refers to an optionally substituted aromatic group with at least one ring having a conjugated s-electron system, containing up to two conjugated and/or fused ring systems.
Aryl includes carbocyclic aryl and biaryl groups, all of which may be optionally substituted.
Substituents are selected from halogen, C1-C4 alkyl, NH2, OCF3, CF3, alkoxy, alkylthio, CN, alkylsulfonyl and NO2, as defined above.
"Alkylsulfonylamino" refers to a radical of the formula -N(H)-S(O)2RAlk where RAlk is an alkyl radical as defined above.
"Sulfonamido"refers to a radical of the formula-S (0) 2NH2.
"Dialkylsulfonamido"refers to a radical of the formula-S (0) 2N (RA) a wherein RAlk independently represents the same or different alkyl radicals as defined above.
"Alkylcarbonyl"refers to a radical of the formula-C (O) R, where RALÇ is an alkyl radical as defined above.
"Alkoxycarbonylalkyl"refers to a radical of the formula-C (O) ORA where RALÇ is an alkyl radical as defined above.
"Aminocarbonyl"refers to a radical of the formula-C (0) NH2.
"Alkylaminocarbonyl"refers to a radical of the formula-C (O) N (H) RAlk where RA& is an alkyl radical as defined above ; or to a radical of the formula-C (O) N (RA) a wherein RALK independently represents the same or different alkyl radicals as defined above.
"Ureido"is a radical of the formula-N (H) C (O) NH2.
"Heteroaryl"refers to an optionally substituted aromatic group with at least one ring having a conjugated s-electron system, containing up to two conjugated and/or fused ring systems and 1-3 heteroatoms selected from O, S and N. Heteroaryl includes carbocyclic heteroaryl, aryl- heteroaryl and biheteroaryl groups, all of which may be optionally substituted. Substituents are selected from halogen, C1-C4 alkyl, NH2, OCF3, CF3, alkoxy, alkylthio, CN, alkylsulfonyl and NO2, as defined above. Examples of heteroaryl rings include pyrrole, furan, thiophene, indole, isoindole, benzofuran, isobenzofuran, benzothiophene, pyridine, quinoline, isoquinoline, quinolizine, pyrazole, imidazole, isoxazole, oxazole, isothiazole, thiazole, pyridazine, pyrimidine, and pyrazine.
The descriptor"trans"indicates that the two methyl groups are located on opposite sides of the piperazine plane. The descriptor"cis"indicates that the two methyl groups are located at the same side of the piperazine plane. The descriptor"E"indicates that the substituents on the double bond of the amide moiety are"entgegen"meaning opposite.
Description and values of the pi and MR parameters can be found in Hansch, C. , and Leo, A., Exploring QSAR : Fundamentals and Applications in Chemistry and Biology. ACS, Washington, DC 1995 and Hansch, C. , Leo, A. , and Hoekman, D. , Exploring QSAR : Hydrophobic, Electronic, and Steric Constants. ACS, Washington, DC 1995.
Structure activity relationship Prior art compounds 1- [4- (4-Fluoro-benzyl)-piperazine-1-yl]-3- (3, 4, 5-trimethoxy-phenyl)-prop-2-en-1-one, 3- (4-chloro-phenyl)-1- [4- (4-fluoro-benzyl)-piperazine-1-yl]-prop-2-en-1-one and 1- (4-chlorobenzyl)-4- (2, 4-dichlorocinnamoyl)-piperazine are included as prior art compounds hereinafter called Compound A, B and C respectively. Compound A and B are described in the international patent application WO 98/56771 (page 118, lines 25 and 19, respectively).
The E-isomer of Compound A is described and claimed in the U. S. Patent No 4,368, 199.
Compound C is described in the U. S. Patent No 4,742, 062.
Compound A Compound B Compound C Compared to the prior art Compounds A, B (E-and Z-configurations) and C and various reference compounds, the compounds of the invention showed an increased affinity for the CCR1 receptor in the affinity binding assay (see Table 3 below). Further, they were surprisingly stronger inhibitors in the Ca2+-flux assay than the prior art and reference compounds. The improved potency of the compounds, where Ri is an aromatic group, correlates amongst others to three structural features, viz: 1. The introduction of X (chloro or preferably fluoro) inp-position of the benzylpiperazine moiety increases potency and affinity significantly. There is no teaching of this effect within the prior art. However, the replacement of X with another functional group, e. g., alkyl, or hydrogen decreases the potency and the affinity.
2. The two methyl groups in 2,5-position in formula (I) are in trans-configuration. The replacement of the methyl groups in trans-2,5-position by a substitution e. g. in 2,6-, in 3, 5-position or with hydrogen as well as changing the orientation to a cis-2,5 substitution, dramatically decreases the potency of the compound in the Ca+-flux assay and the affinity-binding assay.
3. The configuration of the double bond in the cinnamic amide moiety is E. Changing the configuration from E-to Zconfiguration of the double bond in the cinnamic amide part decreases the potency as well as the affinity. Reduction of the double bond to an ethylene group or a substitution of the double bond decreases both potency and affinity.
The invention, combining the features according to 1,2 and 3 above, provides compounds having a surprising and unexpected potency and affinity.
Furthermore, the oral bioavailability is the fraction of dose absorbed via oral administration and describes the rate and amount of the compounds of the invention reaching the systemic circulation. It is therefore crucial to optimise the bioavailability to improve the pharmacokinetic aspects of compounds.
Preparation of compounds The present invention further provides a process for the preparation of a compound of formula (I) by any of the methods given below.
Method A: (ici) (111) (1) The compounds of formula (I) may be prepared by known methods, for example, as shown above by reaction of a piperazine derivative of formula (In with a benzaldehyde of formula (in) wherein X is defined in formula (1) and Y is a formyl group (-CHO). This type of reductive amination is known from literature e. g. , in Berger et al. , Bioorg. Med. Chem. Lett.
2002, 12,2989. Another example is the reaction of a piperazine derivative of formula (II) with a benzylhalogenide of formula (III) wherein X is defined in formula (I) and Y is a halomethylen group (-CH2Br or-CH2C1). The compound of formula (II) in an aprotic polar solvent, such as dimethylformamide, is reacted with an excess molar amount of a compound of formula (III) in the presence of a catalytic amount of potassium iodide. The resulting reaction mixture is stirred for about 3 hours to 24 hours at 60 °C in the presence of an acid- scavenging base, such as trimethylamine. The compound of formula (I) is then isolated from the reaction mixture by standard isolation techniques, such as organic phase extraction, evaporation of solvents and purification by flash column chromatography.
Compounds of the general formula (II) can be prepared by following a protocol described e. g. , in Sekiya et al. , J. Med. Chem 1983,26, 411. Compounds falling within the scope of formula aI) may be prepared by methods, which are generally analogous to those of said literature. Compounds of the general formula (III) are commercially available.
Method B: The compounds of formula (I) may also be prepared by treating the piperazine derivative of formula avé, wherein X is defined in formula (I), with a compound of formula (V), wherein Ll is a leaving group (e. g. a halide such as chloride, a hydroxyl, a benzotriazol-1-yl ester, an isourea group) and Ru ils defined in formula (I). The process of the invention may conveniently be carried out in an organic solvent such as CH2CI2 or CHC13 at a temperature of, for example, 0 °C or above, such as 20 to 120 °C.
Most preferred is a process where the amine derivative of formula (IV) in chloroform is treated with an excess molar amount of a compound of formula (V), wherein Ll is a hydroxy group, in the presence of an excess molar amount of a carbodiimide, such as N- cyclohexylcarbodiimide, N'-methylpolystyrene, and 1-hydroxybenzotriazol. The reaction mixture is stirred at a temperature typically in the range from 60 °C to 150 °C under a time typically in the range from 100 to 1000 seconds in a microwave oven (Smith Synthesiser from Personal Chemistry). Under these conditions the yields improve up to 99%. Compounds of formula (TV) may be obtained via a known protocol described e. g. , in Tabia et al. , J. Med Chem. 1999,42, 2870 or Example 9. Compounds falling within the scope of formula (IV) may be prepared by methods, which are generally analogous to those of said literature.
Compounds of the formula (V) are commercially available or are described e. g. , in Soloshonok et al. , Helv. Chim. Acta 2002,85, 3616; Anderson et al. , J. Med. Chem. 1988, 31, 2097 and Larhed et al., J. Org. Chem. 1996,61, 9582. Compounds falling within the scope of formula (V) may be prepared by methods, which are generally analogous to those of said literature or according to Example 1, Example 2, Example 3, and Example 4.
The present invention can also use acidic adducts of the dimethyl-piperazine derivatives where such acids include, for example, acids such as hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, phosphoric acid, carbonic acid, malic acid, citric acid, fumaric acid, tartaric acid, oxalic acid, methanesulfonic acid, p-toluenesulfonic acid, trifluoroacetic acid and others. Lists of additional suitable salts are found in Remington's Pharmaceutical Sciences, 17. th edition, Mack Publishing Company, Easton, PA, 1985, p. 1418.
Example 1 0-3-Chloro-4niíro-cinnamic acid A mixture of 2-chloro-4-bromo-aniline (413 mg, 2.0 mmol) and m-chloro-peroxybenzoic acid (60%, 1.72 g, 6 mmol) in dichloromethane (30 mL) was refluxed for 24 h. After cooling, the solution was washed with sodium carbonate (3 x 10 mL) and water (20 mL). The organic phase was evaporated and the residue was submitted to flash column chromatography to give 355 mg of 4-bromo-2-chloro-1-nitro-benzene (yield 75 %). A solution of 4-bromo-2-chloro-1- nitrobenzene (237 mg, 1.0 mmol), acrylic acid methyl ester (108 µL, 1.2 mmol), potassium carbonate (150 mg, 1.1 mmol), tributylamine (263 uL, 1.1 mmol) and a catalytic amount of bis (triphenylphosphino) palladium (In dichloride (0.005 eq. ) in DMF (5 mL) was heated at 150 °C for 10 minutes in a microwave oven. 1M aqueous sodium hydroxide (1 mL) and water (4 mL) were added and the mixture was heated for 5 minutes at 130 °C in the microwave oven. The solution was acidified with 1N hydrochloric acid and the aqueous layer was extracted with ethyl acetate. The organic solvents were removed in vacuo and the residue was submitted to flash column chromatography to give the title compound in 40% yield.
1H NMR : 8 (CDCl3) 7.94 (d, 1H), 7.72 (d, 1H), 7.719 (d, 1H), 7.57 (dd, 2H), 6.56 (d, 1H) Other cinnamic acids can be obtained in a similar manner starting from aryl bromides or aryl iodides.
Example 2 (E)-3-Benzo [2, 1, 3Joxadiazol-S-yl-acylic acid To a suspension of sodium hydride (29 mg, 1.2 mmol) in dry TBF (6 mL) trietyl phosphonoacetate (269 mg, 1.2 mmol) was dropwise added and the reaction mixture was stirred at room temperature for 1 h. Benzo [2, 1, 3] oxadiazol-5-carbaldehyde (148 mg, 1.0 mmol) was added and the mixture was heated at 140 °C for 5 minutes in the microwave oven.
1 eq Wang-benzaldehyde resin was added and the mixture was heated for additionally 5 minutes at 140 °C in the microwave oven. Chloroform (6 mL) was added and the resin was filtered off and washed with chloroform. The organic solvent was evaporated and the residue submitted to flash column chromatography. The resulting ester was taken up in EtOH (3 mL) and 1M aqueous sodium hydroxide (1.5 mL) was added. The mixture was heated at 120 °C for 5 minutes in the microwave oven. The solution was acidified with 1N hydrochloric acid and the solid was filtered off, washed with water and dried to give the title compound in 73 % yield.
1H NMR : 8 (CDCl3) 8. 36 (s, 1H), 8.05 (m, 2H), 7.74 (d, 1H), 6.82 (d, 1H) Other (E)-acrylic acids can be obtained in a similar manner starting form aryl-or heteroaryl- aldehydes.
Example 3 (E)-3- (5-Methoxy-benzo [2, 1, 3] oxadiazol-6-yl)-acrylic acid l-Amino-5-methoxy-4-methyl-2-nitrobenzene in glacial AcOH (20 mL) was gradually added to ice-cooled stirred nitrosyl sulfuric acid [from NaN02 (11 mmol) and H2S04 (20 mL sp gr 1.84)] such that the temperature did not exceed 15°C. When the addition was complete, stirring was continued for a further 1 h at 5 °C, then the solution was poured onto crushed ice (100 g). Addition of this diazoniumsalt solution to NaN3 (10 mmol) in Ha0 (25 mL) participated the azide as a solid, which was not purified further because of the possibility of decomposition. The crude damp azide was refluxed in glacial AcOH (10 mL) for 1 h. After cooling, the solvent was evaporated to give 5-methoxy-6-methyl-benzofuroxan (yield 72 %).
To 5-methoxy-6-methyl-benzofuroxan (6.2 mmol) in refluxing EtOH (6 mL) was added dropwise P (OMe) 3 (12.4 mmol). When addition was complete (20 min) refluxing was continued for a further 1 h. The solvent was removed by rotary evaporation and the residue shaken with H20 (10 mL). The solid obtained was filtered of and washed with water. The product was recrystallised from EtOH-H20 to give 5-methoxy-6-methyl- benzo [2, 1, 3] oxadiazol (yield 64). 5-methoxy-6-methyl-benzo [2, 1, 3] oxadiazol (2.8 mmol), N- bromosuccinimide (3.1 mmol) and Bz202 (cat. ) were refluxed in CCl4 (6 mL) for 22 h. The cooled mixture was washed with Ha0 (2x6 mL), the organic phase was dried (Na2SO4) and the solvent was evaporated. The residue was taken up in dioxan (8 mL) and calcium carbonate (14 mmol) and water (8 mL) were added. The mixture was refluxed for 3 h and then evaporated in vacuo. The residue was treated with CH2Cl2 and then with 2N hydrochloric acid until dissolution of the white precipitate occurred. The separated aqueous phase was extracted with CHaCIa. The organic solvent were removed in vacuo and the residue was submitted to flash column chromatography (toluene-> toluene: EtOAc, 20: 1-> toluene: EtOAc, 1: 1) 6- hydroxymethyl-5-methoxy-benzo [2, 1, 3] oxadiazol (yield 61 %). The alcohol (1.7 mmol) was dissolved in CHCl3 (15 mL) and activated manganese dioxide (15 mmol) was added. The mixture was stirred at room temperature for 2.5 h and then filtered of through Celite. The filtrate was concentrated in vacuo to give 5-methoxy-benzo [2, 1, 3] oxadiazol-6-carbaldehyde (yield 86 %). A mixture of 5-methoxy-benzo [2, 1, 3] oxadiazol-6-carbaldehyde (0.8 mmol), malonic acid (0.9 mmol), piperidine (5 FL), pyridine (0.5 mL) and EtOH (1.5 mL) was refluxed for 5 h under stirring. After cooling to room temperature the product precipitated. 2N hydrochloric acid was added and the mixture was stirred for 1 h. The precipitate was collected by filtration, washed with water, and dried under reduced pressure to give the title compound (yield 50 %).
1H NMR : 5 (CDCl3) 12.76 (bs, 1H), 8.49 (s, 1H), 7.77 (d, 1H), 7.32 (s, 1H), 6.81 (d, 1H), 4.00 (s, 3H). <BR> <BR> <BR> <BR> <BR> <BR> <BR> <P> 0-3-(4-Bromo-benzo [2, 1, 3] oxadiazol-6-yl)-acrylic acid, 0-3-benzo [2, 1, 37oxadiazol-4-yl- acylic acid and (E)-3- (5-chloro-benzo [2, 1, 3Joxadiazol-6-yl)-acrylic acid were prepared in a similar manner..
Example 4 (li)-3-(4-Nitro-benzo [2, 1, 3ythiadiazol-5-yl)-acrylic acid To a solution of 4-chloro-2-methyl-6-nitroaniline (5.0 g, 27 mmol) in 1,4-dioxane (20 mL) was added iron powder (5.2 g, 940 mmol) and aqueous NXC1 (5.0 g, 940 mmol in 13 mL of water). The reaction mixture was refluxed for five hours and then allowed to reach room temperature. The reaction mixture was filtered through Celite and was concentrated. The crude product was taken up into CH2C12, filtered and concentrated (yield of 3, 4-diamino-2- nitrotoluene: 4.3 g, 99%).
To a solution oh 3, 4-diamino-2-nitrotoluene (1.91 g, 11 mmol) in triethyl amine (7.7 mL) was added SOC12 (2.23 g, 19 mmol). The reaction mixture was refluxed for three hours and was then allowed to reach room temperature. The reaction mixture was filtered, concentrated and the residue was recrystallized from toluene/heptane (yield of 5-methyl-4-nitro- benzo [2, 1, 3] thiadiazole : 1.3 g, 61%).
1HNMR : 8 (CDCl3) 8.11 (d, 1H), 7.69 (d, 1H), 2.67 (s, 3H).
To a solution of 5-methyl-4-nitro-benzo [2, 1, 3] thiadiazole (1.3 g, 6.7 mmol) in CC14 (10 mL) was added Br2 (1.07 g, 6.7 mmol) and Bz2O2 (20 mg). The reaction mixture was refluxed for 120 hours, allowed to reach room temperature and was then evaporated to dryness. The residue was purified by flash chromatography using silica gel 60 and CHzClx/methanol (1: 0 # 95: 5) yielding a mixture of starting material and desired product (about 40 %). This mixture was dissolved in 1,4-dioxane (10 mL). CaCO3 (2.0 g, 20 mmol) and water (10 mL) were added and the reaction mixture was refluxed for 18 hours. The reaction mixture was allowed to reach room temperature and was concentrated to dryness. To a suspension of the remainder in CHzGb (20 mL) 2M aqueous HCl was added until no solid remained. The aqueous layer was extracted with CHxClx and the combined organic layer was dried, filtered and concentrated. The crude product was dissolved in toluene and purified by flash chromatography using silica gel 60 and heptane/ethyl acetate (4: 1- 2: 1--+ 1: 1) (yield of 5- (hydroxymethyl) -4-nitro-benzo [2, 1, 3] thiadiazole : 0.20g, 14%).
1HNMR : 8 (CDC13) 7.94 (d, 1H), 7.83 (d, 1H), 4.97 (s, 2H), 2.04 (bs, 1H).
To a solution of 5-(hydroxymethyl)-4-nitro-benzo [2, 1, 3] thiadiazole (0.20 g, 0.95 mmol) in CHC13 (18 mL) was added MnO2 (0.74 g, 8.5 mmol) and the reaction mixture was left at room temperature for 18 hours. The reaction mixture was filtered through Celite and was then concentrated (yield of 4-nitro-benzo [2, 1, 3] thiadiazol-5-yl-carbaldehyde: 0.18 g, 96%).
1HNMR : 8 (CDCl3) 10.61 (s, 1H), 8.11 (d, 1H), 8.02 (d, 1H).
To a solution of 4-nitro-benzo [2, 1, 3] thiadiazol-5-yl-carbaldehyde (0.18 g, 0.86 mmol) in pyridine (2 mL) was added malonic acid (0.14 g, 1.34 mmol) and piperidine (0.1 mL). The reaction mixture was refluxed for 30 minutes and was then allowed to reach room temperature. The reaction mixture was acidified using 1M aqueous HCl and the precipitated crude product was collected by filtration and thoroughly washed with CH2Cl2 (yield of (E)-3- (4-nitro-benzo [2, 1, 3] thiadiazol-5-yl) -acrylic acid: 0.043 g, 19%).
1H NMR : 8 (IDMSO-d6) 8.23 (d, 1H), 8.07 (m, 2H), 6.90 (d, 1H).
Other (E)-3- (benzo [2, 1, 3] thiadiazolyl) -acrylic acids were prepared in a similar manner.
Example 5 5. 1 (E)-(trans)-3-(4-Bromo-phenyl)-1-[4-[(4-fluoro-benzyl)-2,5-d imethyl-piperazine-1-yl]- prop-2-en-1-one A mixture of (trans)-1-(4-fluoro-benzyl)-2,5-dimethyl-piperazine (222 mg, 1.0 mmol), (jE)-3- (4-bromo-phenyl) -acrylic acid (341 mg, 1.5 mmol), 1-hydroxybenzotriazol (203 mg, 1.5 mmol) and N-cyclohexylcarbodiimide, N'-methylpolystyrene (167 g, 3.0 mmol of the resin with a loading of 1.8 mmol/g) in CHC13 was heated under 5 minutes at 110 °C in a microwave oven. The mixture was allowed to attain room temperature, TBD-methyl polystyrene (1003 mg, 3 mmol of the resin with a loading of 2.9 mmol/g) was added and the mixture was agitated over night. Both resins were filtered off and washed with CHC13 and EtOAc. The filtrate was concentrated in vacuo and the residue was submitted to flash column chromatography (toluene # toluene: EtOAc, 20: 1 # toluene: EtOAc, 1 : 1) to give the title product in 97% yield.
1H NMR : # (CDC13) 7.61 (d, 1H), 7.50 (dd, 2H), 7.37 (d, 2H), 7.33 (dd, 2H), 7.01 (dd, 2H), 6.84 (d, 1H), 3.53 (m, 2H), 3.06 (bs, 1H), 2.74 (bs, 1H), 2. 29 (d, 1H), 1. 34 (d, 3H), 1. 01 (d, 3H) The following compounds were prepared in a similar manner: 5. 2 (E)-(trans)-3-(4-Chloro-3-nitro-phenyl)-1-[4-(4-chloro-benzy l)-2,5-dimethyl-piperazine- 1-yl]-prop-2-en-1-one 1H NMR : # (CDC13) 8. 01 (dd, 1H), 7. 59 (m, 3H), 7. 30 (m, 4H), 6. 92 (d, 1H), 3. 54 (m, 2H), 3.08 (bs, 1H), 2.76 (d, 1H), 2.30 (d, 1H), 1. 35 (d, 3H), 1. 01 (d, 3H) 5. 3 (E)-(trans)-3-(3,4-Dichloro-phenyl)-1-[4-(4-fluoro-benzyl)-2 ,5-dimethyl-piperazine-1- yl]-prop-2-en-1-one 1HNMR : 8 (CDC13) 7.59 (m, 1H), 7.43 (m, 1H), 7.33 (m, 3H), 7.01 (dd, 2H) 6.83 (d, 1H), 3.53 (m, 2H), 3.07 (bs, 1H), 2.74 (d, 1H), 2.29 (d, 1H), 1.34 (bs, 3H), 1. 01 (d, 3H) 5. 4 (E)-(trans)-1-[4-(4-Fluoro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-p-tolyl-prop-2-en-1- one 1H NMR : 8 (CDC13) 7.66 (d, 1H), 7.41 (d, 2H), 7.32 (m, 2H), 7. 17 (d, 2H), 7. 01 (dd, 2H), 6. 81 (d, 1H), 3.52 (m, 2H), 3.05 (bs, 1H), 2.74 (dd, 1H), 2.36 (s, 3H), 2.28 (dd, 1H), 1.33 (d, 3H), 1.01 (d, 3H) 5.5 (E)-(trans)-1-[4-(4-Fluoro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-(4-nitro-phenyl)- prop-2-en-1-one 1H NMR : 8 (CDC13) 8. 23 (d, 2H), 7.70 (d, 1H), 7.65 (d, 2H), 7. 33 (dd, 2H), 7.02 (dd, 2H), 6.97 (d, 1H), 3.54 (m, 3H), 3.08 (bs, 1H), 2.76 (d, 1H), 2.31 (d, 1H), 1.36 (bs, 3H), 1.02 (d, 3H) 5.6 (E)-(rans)-3-(2,4-Dichloro-phenyl)-1-[4-(4-fluoro-benzyl)-2, 5-dimethyl-piperazine-1- yl]-prop-2-en-1-one hydrochloride 1H NMR : # (CDC13) 7. 98 (d, 1H), 7. 91 (dd, 1H), 7. 49 (m, 2H), 7. 29 (m, 2H), 7. 15 (dd, 2H), 6.74 (d, 1H), 4.38 (m, 2H), 3.93 (m, 2H), 2.97 (bs, 1H), 2.85 (d, 1H), 1. 63 (bs), 1. 40 (d, 3H) 5. 7 (E)-(trans)-3-Benzo[b]thiophen-2-yl-1-[4-(4-fluoro-benzyl)-2 ,5-dimethyl-piperazine-1- yl]-prop-2-en-1-one 'H NMR : 8 (CDC13) 7. 90 (d, 1H), 7. 76 (m, 2H), 7.42 (s, 1H), 7.34 (m, 4H), 7.01 (d, 2H), 6.71 (d, 1H), 3.53 (m, 2H), 3.07 (bs, 1H), 2. 75 (d, 1, 2.30 (d, 1H), 1. 34 (bs, 3M, 1. 02 (d, 3H) 5. 8 (E)-(trans)-3-Benzo[b]thiophen-3-yl-1-[4-(4-fluoro-benzyl)-2 ,5-dimethyl-piperazine-1- ylJ-prop-2-en-1-one 1H NMR : 8 (CDCl3) 8.01 (s, 1H), 7.98 (d, 2H), 7. 88 (d, 1H), 7. 69 (s, 1M, 7. 43 (m, 2H), 7.33 (dd, 2H), 7. 01 (dd, 2H), 6. 95 (d, 1H), 3.54 (m, 2H), 3.07 (bs, IM, 2.77 (dd, 1H), 2.31 (d, 1H), 1. 36 (d, 3H), 1. 03 (d, 3H) 5. 9 (E)-(trans)-3-(3,4-Dichloro-phenyl)-1-[4-(4-chloro-benzyl)-2 ,5-dimethyl-piperazine-1- yl]-prop-2-en-1-one 'H NMR : 8 (CDC13) 7. 57 (m, 2H), 7.44 (d, 1H), 7.31 (m, 5H), 6.83 (d, 1H), 3.53 (m, 2H), 3.07 (bs, IM, 2.75 (d, 1H), 2.29 (d, 1H), 1.34 (bs, 3H), 1. 01 (d, 3H) 5. 10 (E)-(trans)-3-(3,4-Dimethoxy-phenyl)-1-[4-(4-fluoro-benzyl)- 2,5-dimethyl-piperazine-1- yl]-prop-2-e-1-one 1H NMR : 8 (CDCl3) 7.63 (d, 1H), 7.33 (dd, 2H), 7. 11 (dd, 1H), 7. 01 (m, 3H), 6. 86 (d, 1H), 6. 71 (d, 1H), 3. 92 (s, 3H), 3. 91 (s, 3H), 3.53 (m, 2H), 3.05 (bs, 1H), 2.75 (dd, 1H), 2.29 (dd, 1H), 1.34 (d, 3H), 1.01 (d, 3H) 5. 11 (E)-(trans)-3-(3-Bromo-4,5-dimethoxy-phenyl)-1-[4-(4-fluoro- benzyl)-2,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one iH NMR : 8 (CDCl3) 7.54 (d, 1H), 7.33 (m, 3H), 7.01 (dd, 2H), 6. 93 (d, 1H), 6. 75 (d, 1H), 3. 89 (s, 3H), 3.88 (s, 3H), 3.53 (m, 2H), 3.06 (bs, 1H), 2.75 (d, 1H), 2. 29 (d, 1M, 1.34 (d, 3H), 1.01 (d, 3H) 5. 12 (E)-(trans)-3-(4-Chloro-3-trifluoromethyl-phenyl)-1-[4-(4-fl uoro-benzyl)-2,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one IN NOR : 8 (CDCl3), 7.80 (d, 1H), 7. 63 (d, 1H), 7. 51 (d, 1H), 7. 33 (dd, 2H), 7. 01 (dd, 2H), 6.88 (d, 1H), 3.53 (m, 2H), 3.07 (bs, 1H), 2. 75 (d, 1H), 2. 30 (d, 1H), 1.35 (bs, 3H), 1.01 (d, 3H) 5.13 (E)-(trans)-3-Benzo[2,1,3]oxadiazol-5-yl-1-[4-(4-fluroo-benz yl)-2,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDCl3) 7.89 (s, 1H), 7.85 (d, 1H), 7.72 (d, 1H), 7. 62 (d, 1H), 7. 38 (dd, 2H), 7. 03 (m, 3H), 3.63 (m, 2H), 3.21 (bs, 1H), 2.81 (bs, 1H), 2.38 (d, 1H), 1.38 (d, 3H), 1. 07 (d, 3H) 5. 14 (E)-(trans)-3-(2,4-Dimethyl-phenyl)-1-[4-(4-fluoro-benzyl)-2 ,5-dimethyl-piperazine-1- ylJ-prop-2-en-1-one 1H NMR : 8 (CDC13) 7. 94 (d, 1H), 7.44 (d, 1H), 7.34 (dd, 2H), 7. 02 (m, 4H), 6. 73 (d, 1H), 3. 54 (m, 2H), 3.06 (bs, 1H), 2.75 (dd, 1H), 2.41 (s, 3H), 2.33 (s, 3H), 2.29 (d, 1H), 1.34 (d, 3H), 1.02 (d, 3H) 5. 15 (E)-(trans)-1-[4-(4-Chloro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-(4-chloro-phenyl)- prop-2-en-1-one 1H NMR : 8 (CDCl3) 7.63 (d, 1H), 7.44 (d, 2H), 7.34 (m, 6H), 6. 82 (d, IM, 3.53 (m, 2H), 3.06 (bs, 1H), 2. 75 (dd, 1H), 2. 28 (d, 1H), 1. 34 (d, 3H), 1. 01 (d, 3H) 5. 16 (E)-(trans)-1-[4-(4-Fluoro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-(4-methyl-3-nitro- phenyl)-prop-2-en-1-one 1H NMR : S (CDC13) 8. 12 (d, 1H), 7.63 (m, 2H), 7.34 (m, 3H), 7.03 (dd, 2H), 6.91 (d, 1H), 3.54 (m, 2H), 3.07 (bs, 1H), 2. 75 (d, 1H), 2.62 (s, 3H), 2.30 (d, 1H), 1.35 (bs, 3H), 1.01 (d, 3H) 5. 17 (E)-(trans)-1-[4-(4-Chloro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-(4-methyl-3-nitro- phenyl)-prop-2-en-1-one 1H NMR : 8 (CDC13) 8. 13 (d, 1H), 7. 65 (d, 1H), 7. 59 (dd, 1H), 7. 35 (d, 1H), 7.30 (m, 4H), 6. 91 (d, 1H), 3.54 (m, 2H), 3.08 (bs, 1H), 2. 76 (bs, 1H), 2. 62 (s, 3H), 2.29 (d, 1H), 1.35 (bs, 3H), 1.01 (d, 3H) 5.18 (E)-(trans)-3-Benzo[2,1,3]triadiazol-5-yl-1-[4-(4-fluoro-ben zyl)-2,5-dimethyl- piperazine-1-ylJ-prop-2-en-1-one 1H NMR: #(CDCl3) 8.08 (s, 1H), 7.99 (d, 1H), 7. 81 (dd, 2H), 7. 34 (dd, 2H), 7. 02 (m, 3H), 3. 55 (m, 2H), 3.09 (bs, IM, 2. 77 (d. 1H), 2.32 (d, 1H), 1. 37 (bs, 3M, 1. 04 (d, 3H) 5. 19 (E)-(trans)-1-[4-(4-Fluoro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-(3,4,5-trimethoxy- phenyl)-prop-2-en-1-one 1H NMR : 8 (CDC13) 7. 59 (d, 1H), 7.33 (m, 2H), 7.01 (dd, 2H), 6.73 (m, 3H), 3.89 (s, 6H), 3.87 (s, 3H), 3.53 (m, 2H), 3.06 (bs, 1H), 2.75 (dd, 1H), 2.29 (dd, 1H), 1.34 (d, 3H), 1.01 (d, 3H) 5. 20 (E)-(trans)-3-(4-Chloro-2-nitro-phenyl)-1-[4-(4-fluoro-benzy l)-2,5-dimethyl-piperazine- 1-yl]-prop-2-en-1-one 1H NMR : 8 (CDCl3) 8.03 (d, IM, 7.85 (d, 1H), 7.58 (m, 2H), 7.33 (dd, 2H), 7.01 (dd, 2H), 6.69 (d, 1H), 3.54 (m, 2H), 3.07 (bs, 1H), 2.76 (dd, 1H), 2.30 (dd, 1H), 1.35 (d, 3H), 1.03 (d, 3H) 5. 21 (E)-(trans)-3-(3-Chloro-4-nitro-phenyl)-1-[4-(4-fluoro-benzy l)-2,5-dimethyl-piperazine- 1-yl]-prop-2-en-1-one 1H NMR : # (CDC13) 7.89 (d, 1H), 7.64 (m, 1H), 7.59 (d, 1H), 7.48 (dd, 1H), 7.31 (dd, 2H), 6.99 (m, 3H), 3.52 (m, 2H), 3.06 (bs, 1H), 2.72 (bs, 1H), 2.29 (d, 1H), 1.34 (bs, 3H), 0.99 (d, 3H) ; MS: (ESI) 432 [M+H]+.
5. 22 (E)-(trans)-3-(4-Chloro-3-methoxy-5-nitro-phenyl)-1-[4-(4-fl uoro-benzyl)-2,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDCl3) 7.58 (d, 1H), 7.54 (d, 1H), 7.31 (dd, 2H), 7.12 (d, 1H), 7.00 (dd, 2H), 6.88 (d, 1H), 3.98 (s, 3H), 3.52 (m, 2H), 3.06 (bs, 1H), 2. 74 (d, 1H), 2.29 (d, 1H), 1.33 (bs, 3H), 0.99 (d, 3H) ; MS: (ESI) 462 [M+H]+.
5. 23 (E)-(trans)-1-[4-(4-Fluoro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-(4-trifluoromethyl- phenyl)-prop-2-en-1-one 1H NMR : 8 (CDC13) 7.62 (d, 1H), 7.55 (m, 4H), 7.26 (dd, 2H), 6.96 (m, 2H), 6.86 (d, 1H), 3.47 (m, 2H), 3.01 (bs, 1H), 2.69 (d, 1H), 2.23 (d, 1H), 1.28 (bs, 3H), 0.95 (d, 3H).
5. 24 (E)-(trans)-3-(2-Chloro-4-methyl-phenyl)-1-[4-(4-fluoro-benz yl)-2,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDC13) 7.98 (d, 1H), 7.48 (d, 1H), 7.34 (dd, 2H), 7.24 (s, 1H), 7.07 (d, 1H), 7.02 (dd, 2H), 6.81 (d, 1H), 3.54 (m, 2H), 3.06 (bs, 1H), 2. 75 (dd, 1H), 2.35 (s, 3H), 2.29 (dd, 1H), 1.35 (d, 3H), 1.02 (d, 3H).
5. 25 (E)-(trans)-1-[4-(4-Fluoro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-(3-trifluoromethyl- 4-nitro-phenyl)-prop-2-en-1-one 7.93 (m, 2H), 7.81 (d, 1H), 7. 69 (d, 1H), 7.34 (dd, 2H), 7. 02 (m, 3H), 3.55 (m, 2H), 3.10 (bs, 1H), 2.76 (bs, 1H), 2. 32 (d, 1H), 1.37 (bs, 311), 1. 03 (d, 3M.
5. 26 (E)-(trans)-3-(4-Chloro-3-methoxy-phenyl)-1-[4-(4-fluoro-ben zyl)-2,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDCl3) 7.63 (d, 1H), 7.35 (m, 3H), 7.10 (dd, 1H), 7. 03 (dd, 2H), 6.83 (d, 1H), 3.94 (s, 3H), 3.54 (m, 2H), 3.08 (bs, 1H), 2. 76 (dd, 1H), 2. 32 (d, 1H), 1. 36 (d, 3H), 1. 02 (d, 3H).
5. 27 (E)-(trans)-3-(3-Chloro-4,5-dimethoxy-phenyl)-1-[4-(4-fluoro benzyl)-2,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDCl3) 7.56 (d, 1H), 7.34 (dd, 2H), 7.19o (d, 1H), 7. 02 (dd, 2H), 6. 91 (d, 1H), 6. 77 (d, 1H), 3.91 (s, 3H), 3.90 (s, 3H), 3.54 (m, 2H), 3.07 (bs, 1H), 2. 76 (m, 1H), 2.30 (d, 1H), 1.35 (d, 3H), 1.02 (d, 31-1).
5. 28 (E)-(trans)-1-[4-(4-Fluorobenzyl)-2,5-dimethyl-piperazine-1- yl]-3-(5-methoxy- benzo[2,1,3]oxadiazol-6-yl)-prop-2-en-1-one 'H NMR : 8 (CDCl3) 7. 88 (m, 2H), 7.33 (dd, 2H), 7. 01 (m, 3H), 6.90 (s, 1H), 3.97 (s, 3H), 3.54 (m, 2H), 3.08 (bs, 1H), 2. 76 (d, 1H), 2.31 (d, 1H), 1.36 (bs, 3H), 1.03 (d, 3H).
5. 29 (E)-(trans)-3-(4-Bromo-3,5-dimethoxy-phenyl)-1-[4-(4-fluorob enzyl)-3,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDC13) 7. 61 (d, 1H), 7.34 (dd, 2E), 7. 02 (dd, 2H), 6. 85 (d, 1H), 6.70 (s, 2H), 3.94 (s, 6H), 3.54 (m, 2H), 3.08 (bs, 1H), 2.77 (dd, 1H), 2. 31 (d, 1H), 1.36 (d, 3H), 1.02 (d, 3H).
5. 30 (E)-(trans)-1-[4-(4-Fluorobenzyl)-2,5-dimethyl-piperazine-1- yl]-3-(3-methoxy-4- methyl-phenyl)-prop-2-en-1-one IL NUR : 8 (CDCl3) 7.66 (d, 1H), 7.34 (dd, 2H), 7.14 (d, 1H), 7. 07 (d, 1H), 7. 02 (dd, 2H), 6.94 (s, 1H), 6.81 (d, 1H), 3.87 (s, 3H), 3.54 (m, 2H), 3.07 (bs, 1H), 2. 76 (dd, 1H), 2.30 (d, 1H), 2.24 (S, 3H), 1. 35 (d, 3H), 1.02 (d, 3H).
5. 31 (E)-(trans)-3-Benzo[2,1,3]oxadiazol-4-yl-1-[4-(4-fluoromeben zyl)-2,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one 'H NMR : 8 (CDCl3) 7. 93 (bs, 1H), 7.79 (m, 2H), 7.45 (m, 2H), 7. 35 (dd, 2H), 7.02 (dd, 2H), 4.37 (bs, 1H), 3.79 (bs, 1H), 3.55 (m, 2H), 3.10 (d, 2H), 2.78 (s, 1H), 2,34 (bs, 1H), 1.39 (d, 3H), 1. 04 (d, 3H).
5. 32 (E)-(trans)-3-(4-Bromo-benzo[2,1,3]oxadiazol-6-yl]-1-[4-(4-f luorobenzyl)-2,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one RU NOR : # (CDCl3) 7.83 (s, 2H), 7.68 (d, 1H), 7.34 (dd, 2HO, 7. 01 (m, 3H), 3.55 (m, 2H), 3.11 (bs, 1H), 2.78 (d, 1H), 2.33 (d, 1H), 1.38 (bs, 3H), 1.04 (d, 3H).
5. 33 (E)-(trans)-3-(4-Bromo-phenyl)-1-[4-(4-chlorobenzyl)-2,5-dim ethyl-piperazine-1-yl]- prop-2-en-1-one 1H NMR : 8 (CDC13) 7. 61 (d, 1H), 7. 50 (d, 2H), 7. 37 (d, 2H), 7. 30 (m, 4H), 6.84 (d, 1H), 3. 53 (m, 2H), 3.06 (bs, 1H), 2.74 (d, 1H), 2.28 (d, 1H), 1. 34 (d, 3H), 1. 00 (d, 31-1).
5. 34 (E)-(trans)-3-(3-Bromo-4,5-dimethoxy-phenyl)-1-[4-(4-chlorob enzyl)-2,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDCl3) 7.54 (d, 1H), 7. 34 (d, 1H), 7. 30 (m, 4H), 6.93 (d, 1H), 6.74 (d, 1H), 3.89 (s, 3H), 3.88 (s, 3H), 3.53 (m, 2H), 3.06 (bs, IM, 2. 75 (d, 1H), 2. 28 (d, 1H), 1. 34 (d, 3H), 1.01 (d, 3H).
5. 35 (E)-(trans)-1-[4-(4-Chlorobenzyl)-2,5-dimethyl-piperazine-1- yl]-3-(4-chloro-3- trifluoromethyl-phenyl)-prop-2-en-1-one 1H NMR : 8 (CDC13) 7. 80 (d, 1H), 7. 63 (d, 1H), 7. 58 (dd, 1H), 7. 51 (d, 1H), 7. 30 (m, 4H), 6.88 (d, 1H), 3. 53 (m, 2H), 3.07 (bs, 1H), 2. 75 (d, 1H), 2.29 (d, 1H), 1.35 (bs, 3H), 1.01 (d, 31-1).
5. 36 (E)-(trans)-1-[4-(4-Chlorobenzyl)-2,5-dimethyl-piperazine-1- yl]-3-(4-nitro-phenyl)- prop-2-en-1-one IN NOR : 8 (CDC13) 8. 23 (d, 2H), 7.70 (d, 1H), 7. 65 (d, 2H), 7.30 (m, 4H), 6.98 (d, 1H), 3. 54 (m, 2H), 3.08 (bs, 1H), 2. 76 (d, 1H), 2.30 (d, 1H), 1.36 (bs, 3H), 1. 02 (d, 3H).
5. 37 (E)-(trans)-1-[4-(4-Chlorobenzyl)-2,5-dimethyl-piperazine-1- yl]-3-(4-methyl-phenyl)- prop-2-en-1-one 1H NMR : 8 (CDC13) 7. 66 (d, 1H), 7. 41 (d, 2H), 7. 30 (m, 4H), 7.17 (d, 2H), 6. 81 (d, IM, 3. 53 (m, 2H), 3.05 (bs, 1H), 2. 74 (dd, 1H), 2.37 (s, 3H), 2.27 (dd, 1H), 1. 33 (d, 3H), 1. 00 (d, 3H).
5. 38 (E)-(trans)-3-(5-chloro-benzo[2,1,3]oxadiazol-6-yl)-1-[4-(4- fluorobenzyl)-2,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDC13) 8.03 (s, 1H), 7.96 (m, 2H), 7.33 (dd, 2H), 7.02 (m, 2H), 6.94 (bs, 1H), 3.54 (m, 2H), 3.09 (bs, 1H), 2.76 (bs, 1H), 2.31 (d, 1H), 1.37 (bs, 3H), 1.04 (d, 3H).
5. 39 (E)-(trans)-3-(3-Bromo-4-chloro-phenyl)-1-[4-(4-fluorobenzyl )-2,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDCl3) 7.77 (d, 1H), 7.58 (d, 1H), 7.45 (d, 1H), 7.37 (d, 1H), 7.32 (dd, 2H), 7.02 (t, 2H), 6.83 (bd, 1H), 3.61 (d, 1H), 3.46 (d, 1H), 3.07 (bs, 1H), 2.75 (bd, 1H), 2.30 (d, 1H), 1.34 (bs, 3H), 1.01 (d, 3H), 5. 40 (E)-(trans)-3-(4-Bromo-3-chloro-phenyl)-1-[4-(4-fluorobenzyl )-2,5-dimethyl- piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDCl3) 7.58 (m, 3H), 7.33 (dd, 2H), 7,24 (d, 1H), 7.02 (t, 2H), 6.87 (bd, 1H), 3.61 (d, 1H), 3.46 (d, 1H), 3.07 (bs, 1H), 2.75 (bd, 1H), 2.29 (d, 1H), 1.26 (bs, 3H), 1.01 (d, 3H).
5.41 (E)-(trans)-3-(3,4-Dibromo-phenyl)-1-[4-(4-fluorobenzyl)-2,5 -dimethyl-piperazine-1- yl]-prop-2-en-1-one 1H NMR : # (CDC13) 7.76 (d, 1H), 7.61 (d, 1H), 7.54 (d, 1H), 7.33 (dd, 2H), 7.27 (m, 1H), 7.02 (t, 2H), 6.86 (bd, 1H), 3.61 (d, 1H), 3.46 (d, 1H), 3.07 (bs, 1H), 2.75 (bd, 1H), 2.30 (d, 1H), 1.34 (bs, 3H), 1.01 (d, 3H).
5. 42 (E)-(trans)-3-(4-Bromo-3-nitro-phenyl)-1-[4-(4-fluorobenzyl) -2,5-dimethyl-piperazine- 1-yl]-prop-2-en-1-one 1HNMR : 8 (CDC13) 7.97 (d, 1H), 7.74 (d, 1H), 7.63 (d, 1H), 7.52 (d, 1H), 7.33 (dd, 2H), 7.02 (t, 2H), 6.94 (bd, 1H), 3.61 (d, 1H), 3.46 (d, 1H), 3.08 (bs, 1H), 2.75 (bd, 1H), 2.31 (d, 1H), 1.32 (bs, 3H), 1.01 (d, 3H).
5. 43 (E)-(trans)-3-(4-Chloro-benzo[2,1,3]oxadiazol-6-yl)-1-[4-(4- fluorobenzyl)-2,5- dimethyl-piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDC13) 7.80 (s, 1H), 7.68 (d, 1H), 7.63 (s, 1H), 7.33 (dd, 2H), 6.99 (m, 3H), 3.62 (d, 1H), 3.48 (d, 1H), 3.09 (bs, 1H), 2.77 (bs, 1H), 2.32 (d, 1H), 1.33 (bs, 3H), 1.03 (d, 3H).
5.44 (E)-(trans)-3-(6-Chloro-benzo[2,1,3]oxadiazol-4-yl)-1-[4-(4- fluorobenzyl)-2,5- dimethyl-piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDCl3) 7. 96 (bt, 1H), 7. 82 (d, 1H), 7. 69 (d, 1H), 7. 39 (d, 1H), 7.34 (dd, 2H), 7.02 (dd, 2H), [4.88 (bs) and 3.33 (bS) (1H)], 4. 34 (bd, 1H), 3.76 (bs, 1H), 3.62 (d, 1H), 3.48 (d, 1H), 3.10 (bs, IM, 2. 80 (bs, 1H), 2. 33 (bs, 1H), 1.35 (bs, 3H), 1.03 (d, 3H).
5. 45 (E)-(trans)-3-(4-Bromo-benzo[2,1,3]thiadiazol-6-yl)-1-[4-(4- fluorobenzyl)-2,5- dimethyl-piperazine-1-yl]-prop-2-en-1-one HNMR : 8 (CDC13) 8.04 (s, 1H), 8.01 (s, 1H), 7.77 (d, 1H), 7. 34 (dd, 2H), 7. 01 (m, 3H), 3.62 (d, 1H), 3.48 (d, 1H), 3.10 (bs, 1H), 2. 78 (bs, 1H), 2.31 (d, 1H), 1.31 (bs, 3H), 1. 04 (d, 3H).
5. 46 (E)-(trans)-3-(4-Chloro-benzo[2,1,3]thiadiazol-6-yl)-1-[4-(4 -fluorobenzyl)-2,5- dimethyl-piperazine-1-yl]-prop-2-en-1-one 1HNMR : 8 (CDC13) 7.98 (s, 1H), 7.84 (s, 1H), 7.78 (d, 1H), 7.34 (dd, 2H), 7.02 (m, 3H), 3.62 (d, 1H), 3.47 (d, 1H), 3.10 (bs, 1H), 2.78 (bd, IM, 2.32 (d, 1H), 1.31 (bs, 3M, 1. 04 (d, 3H).
5. 47 (E)-(trans)-3-(4-Bromo-5-methoxy-benzo[2,1,3]thiadiazol-6-yl )-1-[4-(4-fluorobenzyl)- 2, 5-dimethyl-piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDCl3) 8.10 (s, 1H), 7.94 (d, 1H), 7.34 (dd, 2H), 7.02 (m, 3H), 3.98 (s, 3H), 3. 62 (d, 1H), 3. 47 (d, 1H), 3.09 (bs, 1H), 2.78 (bs, IM, 2. 32 (d, 1H), 1.31 (bs, 3H), 1.04 (d, 3H).
5.48 (E)-(trans)-1-[4-(4-Fluoro-benzyl)-2,5-dimethyl-piperazine-1 -yl]-3-(4-nitro- benzo [2, 1, 3] thiadiazol-5-yl)-prop-2-en-1-one 1H NMR : 8 (CDC13) 8.17 (d, 1H), 7.93 (d, 1H), 7.81 (d, 1H), 7.34 (dd, 2H), 7.02 (m, 3H), 3.63 (d, 1H), 3.48 (d, 1H), 3.09 (bs, 1H), 2. 78 (bd, 1H), 2.32 (d, 1H), 1.38 (bs, 3H), 1.05 (d, 31-1).
5. 49 (E)-(trans)-3-(6-Chloro-benzo[2,1,3]thiadiazol-4-yl)-1-[4-(4 -fluorobenzyl)-2,5- dimethyl-piperazine-1-yl]-prop-2-en-1-one 1H NMR : 8 (CDC13) 8.17 (bd, IM, 7.98 (d, 1H), 7.83 (bd, 1H), 7. 61 (d, 1H), 7.34 (dd, 2H), 7. 02 (t, 2H), [4. 89 (bs) and 3.33 (bs) (1H)], 4. 37 (bs, 1H), 3. 78 (bs, 1H), 3. 62 (d, 1H), 3.48 (d, 1H), 3.10 (bs, 1H), 2. 79 (bs, 1H), 2. 34 (bd, 1H), 1. 38 (bs, 3H), 1.04 (d, 3H).
Example 6 6.1 (E)-(trans)-3-(4-Chloro-phenyl)-1-[4-(4-fluoro-benzyl)-2,5-d imethyl-piperazine-1-yl]- prop-2-en-1-one To a solution of (trans)-1-(4-fluoro-benzyl)-2, 5-dimethyl-piperazine (1.30 g, 6.7 mmol) and trimethylamine (1.41 mL, 10.1 mmol) in 15 mL of CHC13, a solution of (E)-4-chloro- cinnamoyl-chloride (1.34 g, 6.7 mmol) was added and the reaction mixture was stirred for 3 h at room temperature. The organic layer was washed with 1M aqueous NaOH, dried and concentrated. The residue was recrystallised from EtOH: water (7: 3) to give the pure product in 80% yield.
1H NMR : #(d6-acetone) 7.66 (m, 2H), 7.54 (d, 1H), 7.40 (m, 4H), 7.22 (d, 1H), 7.06 (m, 2H), 4.59 (bs, 1H), 4.10 (bs, 1H), 3.56 (m, 2H), 3.05 (bs, 1H), 2.73 (d, 1H), 2.29 (dd, 1H), 1.27 (d, 3H), 0.97 (d, 3H) The following compound was prepared in a similar manner: 6.2 (E)-(trans)-3-(4-Chloro-3-nitro-phenyl)-1-[4-(4-fluoro-benzy l)-2,5-dimethyl-piperazine- 1-ylJ-prop-2-en-1-one 1H NMR : # (d6-acetone) 8.29 (d, 1H), 7.95 (dd, 1H), 7.71 (d, 1H), 7.59 (d, 1H), 7.42 (m, 3H), 7.06 (m, 2H), 4.60 (bs, 1H), 4.11 (bs, 1H), 3.56 (m, 2H), 3.05 (bs, 1H), 2.73 (bs, 1H), 2.29 (d, 1H), 1.27 (bs, 3H), 0.97 (d, 3H).
Example 7 p-Chloro-cis-cinnamic acid A solution of 18-crown-6 (5.0 g, 18.9 mmol) in THF (20 mL) was cooled to-40°C and bis (2,2, 2-trifluoroethyl)- (methoxycarbonyhnethyl) phosphonate (0.85 mL, 4 mmol) followed by KHMDS (890 mg, 4 mmol) were added. After stirring for 15 min, p-chlorobenzaldehyde (560 mg, 3.78 mmol) was added and the solution was stirred for 2 h. Saturated aqueous ammonium chloride (50 mL) and ethyl ether (30 mL) were added and the organic phase was washed with 1 N HC1. After drying and evaporation, the residue was purified by chromatography (Si02, H/E 4/1) to givep-chloro-cis-cinnamic acid methyl ester (610 mg, 82%). The methyl ester was hydrolysed in EtOH/aqueous 1 M NaOH; 2/1 (15 mL) at 120°C for 5 min. After addition of water and aqueous HC1 the precipitate was collected to afford purep-chloro-cis-cinnamic acid (402 mg, 71 %).
1H NMR : 8 (CDC13) 11.26 (bs, 1H), 7.54 (m, 2H), 7.32 (m, 2H), 7.00 (d, 1H), 5.97 (d, 1H).
Example 8 In the same manner as described in Example 5, the p-chloro-cis-cinnamic acid was reacted with a) (trans)-1- (4-fluoro-benzyl)-2, 5-dimethyl-piperazine 8.1 (Z)-(trans)-3-(4-Chloro-phenyl)-1-[4-(4-fluoro-benzyl)-2,5-d imethyl-piperazine-1-yl]- prop-2-en-1-one ; compound D 1H NMR : 8 (CDC13) 7.43 (d, 1H, rotamer A), 7.37 (d, 1H, rotamer B), 7.28 (m, 10H, rotamer A+B), 6.96 (m, 4H, rotamer A+B), 6.56 (d, 1H, rotamer A), 6.55 (d, 1H, rotamer B), 6.06 (d, 1H, rotamer A), 6.02 (d, 1H, rotamer B), 4.77 (m, 1H, rotamer B), 4.27 (d, 1H, rotamer), 3.97 (m, 1H, rotamer A), 3.53 (m, 2H, rotamer A+B), 3.37 (m, 3H, rotamer A+B), 3.28 (dd, 1H, rotamer B), 3.16 (dd, 1H, rotamer A), 3.04 (m, 1H, rotamer A), 2.83 (m, 1H, rotamer B), 2.64 (dd, 1H, rotamer B), 2.39 (dd, 1H, rotamer A), 2.21 (d, 1H, rotamer B), 2.07 (d, 1H, rotamer A), 1.22 (d, 3H, rotamer B), 1.12 (d, 3H, rotamer A), 0.93 (d, 3H, rotamer A), 0.80 (d, 3H, rotamer B) ; mlz = 387 [M+H] +. b) 1- (4-fluoro-benzyl)-piperazine 8. 2 (Z)-3-(4-Chloro-phenyl)-1-[4-(4-fluoro-benzyl)-piperazine-1- yl]-prop-2-en-1-one; compound B in Zconfiguration.
1HNMR : o (CDCl3) 7.30 (m, 4H), 7.23 (m, 2H), 6.99 (dd, 2H), 6.61 (d, 1H), 6.05 (d, 1H), 3.67 (dd, 2H), 3.38 (s, 2H), 3.33 (dd, 2H), 2.38 (dd, 2H), 2.06 (dd, 2H).
Example 9 (E)-(cis)-3-(4-Chloro-phenyl)-1-[4-(4-fluoro-benzyl)-2,5-dim ethyl-piperazine-1-yl]-prop-2- en-1-one ; compound E Cis-2, 5-Dimethylpiperazine dihydrobromide (248 mg, 0.9 mmol ; T. T. Thang et al. J. Am.
Chem. Soc. 1985,50, 4913) in EtOH (10 mL) was treated with triethylamine (91 mg, 0.9 mmol). The mixture was heated at 60 °C andp-fluorobenzyl bromide (85 mg, 0.45 mmol) was added. After 30 min, a second portion of triethylamine (45 mg, 0.45 mmol) andp- fluorobenzyl bromide (42 mg, 0.22 mmol) were added to the reaction mixture. After an additional lh of stirring at 60 °C, the last portion of triethylamine (46 mg, 0.45 mmol) andp- fluorobenzyl bromide (43 mg, 0.23 mmol) was added. The reaction mixture was allowed to attain room temperature and the solvent was removed in vacuo. The residue was dissolved in CH2C12, washed with aqueous 1 M NaOH and extracted with CH2Cl2. The organic layer was concentrated and submitted to flash column chromatography (EtOAc: MeOH: NEt3 30: 2: 1 # 10: 1: 1) to yield (4%) (cis)-1-(4-fluorobenzyl)-2, 5-dimethyl-piperazine (8 mg, 0.036 mmol).
(cis)-1- (4-fluorobenzyl)-2, 5-dimethyl-piperazine (8 mg, 0.036 mmol) was reacted with (E)-p- chlorocinnamic acid in the same manner as described in Example 3 to give (E)- (cis)-3- (4- chloro-phenyl)-1- [4- (4-fluoro-benzyl)-2, 5-dimethyl-piperazine-1-yl]-prop-2-en-1-one (10 mg, 0.025 mmol, Yield: 72%).
Conformers in equilibrium, 1H NMR : 8 (CDC13) 7.62 (d, 1H), 7.45 (m, 2H), 7.34 (m, 2H), 7.30 (dd, 2H), 7.01 (dd, 2H), 6.81 (d, 1H), 4.77 (bs), 4.44 (d), 4.15 (m), 3.72 (d), 3.19 (m), 2.96 (d, 1H), 2.78 (m), 2.59 (d, 1H), 2.34 (bs, 1H), 2.17 (m, 1H), 1.29 (m, 3H), 1.23 (d, 3H).
Pharmacological methods In vitro assay In the competitive affinity binding assay, the binding affinity of the compounds for the CCR1 receptor can be determined by measuring their ability to displace l2sI-Mip_la from the CCR1 receptor.
The binding of Mip-1α at the CCR1 receptor leads to an increase of intracellular calcium levels. The ability of the compounds of the invention to block this biologic response of the CCR1 receptor is determined in the Ca2+-flux assay.
Since the binding of compounds to the CCR1 receptor need not to correlate with the biological activity of the receptor, the Ca2+-flux assay is more relevant to demonstrate the effect of the compounds of the invention.
In vitro competitive affinity binding assay Reagents and solutions: 1. Screen Readym Targets : cloned human CCR1 Chemokine receptor, expressed in CHO cells, coated on 96-well FlashPlate# (Perkin Elmer Cat #6120525) 2. Ligand: L-MIP-la from Perkin Elmer (specific activity is 2200 Ci/mmol) was reconstituted to 25 µCi/mL in H20.
3. Assay buffer: 50 mM HEPES, 1 mM CaCl2, 5 mM MgCl2, 0.2% BSA, pH 7.4.
4. MIP-la (Peprotech EC Ltd Cat # 300-08) 5. The compounds of the invention were dissolved in DMSO. A serial dilution was made and ten concentrations of each compound were screened to generate a dose curve from which the ICso value was determined.
Assay Procedure: Membranes coated on the FlashPlate were incubated with 1-MIP-la in the presence and absence of different concentrations of compounds at ambient temperature for 1 hour. The radioactivity in each well was determined in a microplate scintillation counter. The non- specific binding was defined by binding in the presence of 1250-fold unlabeled MIP-1 a. The assay was performed according to the manufacturer's instruction of Screen Ready Targets.
The compounds of the invention, when tested in this assay demonstrated affinity to the CCR1 receptor.
In vitro Ca2+-qux assay on human monocytes Reagents and solutions: 1. Cell culture: a) THP-1 (ATCC Cat&num TIB202) b) Tissue culture medium: RPMI 1640 with Ultraglutamine 1 supplemented with 10 % (v/v) foetal calf serum. This medium is hereinafter referred to as"growth medium".
2. Assay buffer: HBSS (Hanks'balanced salts solution), 20 mM HEPES, 1 mM CaCl2, 1 mM MgCl2, 2.5 mM Probenecid, pH 7.4.
3. Fluo-4AM (Molecular Probes Cat # F14201) 4. Pluronic F-127 (Molecular Probes Cat # P-6867) 5. The compounds of the invention were dissolved in DMSO. A serial dilution was made and nine concentrations of each compound were screened to generate a dose curve from which the ICso value was determined.
6. MIP-la (Peprotech EC Ltd Cat &num 300-08) 7. Victor2 1420 (Perkin Elmer) 8. Microlite 2+ (Dynex Cat # 7572) Assay Procedure: THP-1 cells were grown in T-75 cm2 flasks in growth medium at 37°C in 5% CO2. The cells were harvested by centrifugation and resuspended in assay buffer. The cells were then loaded with 5, uM Fluo-4 and 0.02% pluronic acid (final concentrations) at 37 °C in 5% C02 for 30 min. The excess dye was removed by washing with assay buffer. The cells were resuspended and 105 cells/well were added in a Microlite plate containing compounds and then incubated for 15 minutes at 37 °C in 5% CO2. The cells were then stimulated with MIP-loc and changes in intracellular free Ca2+ concentration were measured with a Victor2. The compounds of the invention, when tested in this assay, demonstrated the ability to inhibit the MIP-la mediated Ca2+ mobilisation in THP-1 cells.
In vivo bioavailability in the mouse Female mice (SJL/N Tac) were given a single intravenous or oral dose of a mixture of 5 or 6 compounds per cassette (nominal dose: 1 mg/kg/compound) in a solution containing 0.5% N, N'-dimethylacetamide (DMA) and 15 % sulfobutyl ether p-cyclodextrin (Captisol@). Blood samples were taken from one mouse per time point and dose group until 24 hour after respective administration. The dose formulations and plasma concentrations of each compound were determined by LC-MS/MS. The pharmacokinetic parameters were determined by non-compartmental analysis using WinNonlin Professional (version 4.0. 1).
The elimination rate constant, #, was estimated by linear regression analysis of the terminal slope of the logarithmic plasma concentration-time curve. The area under the plasma concentration-time curve, AUC0-t, was calculated by using the linear/logarithmic trapezoidal rule. The AUCinfwas calculated with the residual area estimated as Cz/ The calculated plasma concentration at the last time point, Cz, was obtained from the regression equation.
The oral bioavailability (F) was calculated as: <BR> <BR> <BR> <BR> Fo, (AUCmpo/AUCiniv)- (Doseiv/Dosepo).<BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <P>Pharmacodynamic assays Using the procedures set forth in Horuk, R. and Ng, H. Med. Res. Rev. 2000,20, 155 and Horuk, R. Methods, 2003,29, 369 and references therein, the therapeutic efficacy of the compounds according to the invention for the treatment of inflammatory, autoimmune, proliferative or hyperproliferative diseases such as rheumatoid arthritis, multiple sclerosis, systemic lupus erythematosus, inflammatory bowel disease or asthma are shown.
Accordingly, in one embodiment of the invention a composition is provided comprising the compounds of formula I for the treatment of inflammatory, autoimmune, proliferative or hyperproliferative diseases.
The synergistic effect of combining the compounds according to the invention and cyclosporin A also is shown by use of methods mentioned in said references.
Accordingly, in one embodiment of the invention a composition is provided comprising the compounds of formula I in combination with a sub-nephrotoxic amount of cyclosporin A.
Using the procedures set forth in the competitive affinity binding assay and the Ca2+-flux assay, various compounds of the invention were tested for their affinity (IC50af) and ability to block Ca2+-flux (IC50Ca). The results of some examples and the Compounds A, B, C, D, E, and F (Compound D, E, and F are reference compounds) are shown in Table 3 where all ICso- values are given in nM (nano Molar). Table 3 exemplifies the invention, without limiting the scope thereof.
Table 3. Compound Structure IC50 orna E-configuration Prior art ome o F- Invention N X OMe OMe 0OMe 6. 1 E-configuration Invention 14 9 zea o 8. 1 ; D ffT''" Z-configuration Reference 0 >1000 207 a G 9. 1 ; E Reference .. yt tT, 910 O F Reference w"">1000 416 ci 0 ci B N cl E-configurationF 235 63 Prior art 0 8. 2 ; B N H __ Z-configuration FttNß"H Prior art 43 >1000 >1000 a G 5, 6 Invention 18 c I 0 c Cl ., TN r Porart ! !) f 0 ci 6. 2 Invention N 4 N cl """ i zu 0 5. 2 ci Invention 39 6 ce (3 5. 5 F Invenion 33 23 /No2 0 5. 13 Invention \N N- 43 12 N-N N 0 5. 46 Invention oc NS f O cl oq Footnote : All 2, 5-dimethylpiperazine derivatives have been synthesized and tested as racemic mixtures.
The compounds of the invention show oral bioavailability in the mouse. Using the procedures set forth in the in vivo bioavailability assay, various compounds of the invention were tested for their clearance (CL ; L/h/kg), plasma half-liMe (t, m2 ; hrs) as well as oral bioavailability (F ; %) after administration of the nominal dose of 1 mg/kg of each compound. The results of some examples are shown in Table 4. Table 4 exemplifies the invention, without limiting the scope thereof.
Table 4. CL tl/2 F Compound Structure (L) ('s) (%) 6. 1 ' 4. 8 5. 3 62 U o 5. 13 F N ? 3. 5 2. 3 29 o 0 Administration Effective quantities of the compounds of formula (I) are preferably administered to a patient in need of such treatment according to usual routes of administration and formulated in usual pharmaceutical compositions comprising an effective amount of the active ingredient and a suitable pharmaceutically acceptable carrier. Such compositions may take a variety of forms, e. g. solutions, suspensions, emulsions, tablets, capsules, and powders prepared for oral administration, sterile solutions for parental administration, suppositories for rectal administration or suitable topical formulations. Conventional procedures for the selection and preparation of suitable pharmaceutical formulations are described, for example, in Pharmaceuticals-The Science of Dosage Form Design, M. B. Aulton, Churchill Livingstone, 1988.
A suitable daily dose for use in the treatment of RA is contemplated to vary from 0.005 mg/kg to about 10 mg/kg body weight, in particular from 0.025 mg/kg to 2 mg/kg body weight, depending upon the specific condition to be treated, the age and weight of the specific patient, and the specific patient's response to the medication. The exact individual dosage, as well as the daily dosage, will be determined according to standard medical principles under the direction of a physician.
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