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    • 10. 发明申请
    • IMPROVED PROCESS FOR PRODUCING DARIFENACIN
    • 改进生产DARIFENACIN的方法
    • WO2009125430A2
    • 2009-10-15
    • PCT/IN2009/000160
    • 2009-03-09
    • MATRIX LABORATOIRES LIMITEDTYAGI, Om, DuttRAY, Purna, ChandraCHAUHAN, Yogendhra, KumarRAO, K., BabuREDDY, N., MahhanderREDDY, D., Siva, Prasad
    • TYAGI, Om, DuttRAY, Purna, ChandraCHAUHAN, Yogendhra, KumarRAO, K., BabuREDDY, N., MahhanderREDDY, D., Siva, Prasad
    • C07D405/06
    • C07D405/06
    • The present invention discloses an improved process for producing darifenacin, the process comprising decarboxylating (2S,4R)-4-hydroxy-2-pyrrolidine carboxylic acid followed by in situ tosylation to give l-tosyl-3-(R)-(-)-hydroxypyrrolidine, tosylating the l-tosyl-3-(R)-(-)-hydroxypyrrolidine with methyl-p-toluenesuolphonate to give l-tosyl-3- (S)-(-)-tosyloxy pyrrolidine, reacting l-tosyl-3-(S)-(-)-tosyloxy pyrrolidine with diphenyl acetonitrile in presence of a base to give 3-(S)-(+)-(l-cyano-l,l-diphenylmethyl)-l- tosylpyrrolidine, de-protecting 3-(S)-(+)-(l-cyano-l,l-diphenylmethyl)-l- tosylpyrrolidine in the presence of phenol in acidic medium to give 3-(S)-(+)-(l-cyano- 1,1-diphenylmethyl) pyrrolidine, hydrolyzing 3-(S)-(+)-(l-cyano-l,l-diphenylmethyl) pyrrolidine followed by salt formation to obtain 3-(S)-(+)-(l-carbamoyl-l,l- diphenylmethyl)pyrrolidine.L-(+)-tartrate, condensing 3-(S)-(+)-( 1 -carbamoyl- 1,1- diphenylmethyl)pyrrolidine-L(+)-tartrate with 5-(2-bromoethyl)-2,3-dihydrobenzofuran employing a base in a solvent to give darifenacin.
    • 本发明公开了一种改进的达赖芬那克的制备方法,该方法包括使(2S,4R)-4-羟基-2-吡咯烷羧酸脱羧,然后进行原位甲苯磺酰化,得到1-甲苯磺酰基-3-(R) - ( - ) (R) - ( - ) - 羟基吡咯烷与甲基对甲苯磺酸酯反应,得到1-甲苯磺酰基-3-(S) - ( - ) - 甲氧基吡咯烷,使1-甲苯磺酰基-3- 在3-(S) - (+) - (1-氰基-1,1-二苯基甲基)-1-甲苯磺酰基吡咯烷存在下,将3-(S) - ( - ) - 甲氧基吡咯烷与二苯基乙腈反应, 在酸性介质中在苯酚存在下保护3-(S) - (+) - (1-氰基-1,1-二苯基甲基)-1-甲苯磺酰基吡咯烷,得到3-(S) - (+) - (1-氰基 -1,1-二苯基甲基)吡咯烷,水解3-(S) - (+) - (1-氰基-1,1-二苯基甲基)吡咯烷,接着形成盐,得到3-(S) - (+) - - (+) - 酒石酸盐,将3-(S) - (+) - (1-氨基甲酰基-1,1-二苯基甲基)吡咯烷-L(+) - 酒石酸盐与 5-(2-溴乙基)-2,3--D 使用在溶剂中的碱的二氢苯并呋喃来给予达瑞那新。