Methods of asymmetrically synthesizing enantiomers of...

C - Chemistry – Metallurgy – 07 – C

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C07C 317/34 (2006.01) C07C 315/02 (2006.01) C07C 317/46 (2006.01) C07C 319/14 (2006.01) C07C 319/20 (2006.01) C07C 323/52 (2006.01) C07C 323/60 (2006.01) C07D 317/34 (2006.01)

Patent

CA 2387570

A method of synthesizing pure enantiomers of acylanalides such as Casodex® (bicalutamide) and its derivatives includes contacting a compound having a ring structure that, when opened, provides a substituent having the structure of Formula (I), with a compound having a structure of the Formula (II): R7-R6- X1H, under conditions sufficient to provide a compound having the structure of Formula (III) wherein X2 is oxygen, sulfur, sulphinyl (-SO-), sulphonyl (-SO2- ), imino (-NH-), oxidized imino alkylimino (-NR8-) where R8 is alkyl having up to 6 carbon atoms, or oxidized alkylimino. The method further includes treating the compound of Formula (III) under conditions sufficient to provide a pure enantiomer of acylanalides such as Casodex® (bicalutamide) and/or derivatives thereof. In preferred embodiments, R1 is methyl, R2 is methylene, R6 is a direct link, R7 is 4-fluorophenyl, X1 is sulfur, the compound of Formula (II) is 4-fluorobenzenethiol, and X2 is sulphonyl. Methods of synthesizing acylanalides such as Casodex® (bicalutamide) and/or derivatives thereof from a starting material of citramalic acid are also provided.

L'invention concerne une méthode de synthèse d'énantiomères purs d'acylanalides, tels que Casodex® (bicalutamide), et ses dérivés. La méthode consiste à placer un composé ayant une structure cyclique qui, lorsqu'elle est ouverte, présente un substituant de la formule (I), au contact d'un composé ayant une structure de la formule (II): R?7¿-R?6¿-X?1¿H, dans des conditions propres à donner un composé de la formule (III) dans laquelle X?2¿ est oxygène, soufre, sulphinyl(-SO-), sulphonyl(-SO¿2?-), imino(-NH-), imino-alkylamino(-NR?8¿-) oxydé (R?8¿ étant un alkyle possédant jusqu'à 6 atomes de carbone) ou alkylamino oxydé. La méthode consiste en outre à traiter le composé de la formule (III) dans des conditions propres à donner un énantiomère pur d'acylanalides, tels que Casodex® (bicalutamide) et/ou des dérivés dudit énantiomère. Dans des formes de réalisation préférées, R?1¿ est méthyle, R?2¿ est méthylène, R?6¿ est une liaison directe, R?7¿ est 4-fluorophényle, X?1¿ est soufre, le composé de la formule (II) est 4-fluorobenzènethiol, et X?2¿ est sulphonyle. L'invention concerne des méthodes permettant d'obtenir par synthèse des acylanalides, tels que Casodex® (bicalutamide) et/ou des dérivés desdits acylanalides à partir d'un produit de départ d'acide citramalique.

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