申请人:Lustig Petr
公开号:US20100256394A1
公开(公告)日:2010-10-07
A method of preparing (−)-cis-(5R,6S)-6-phenyl-5-[4-(2-pyrrolidin-1-ylethoxy)phenyl]-5,6,7,8-tetrahydronaphthalen-2-ol D-tartrate-lasofoxifene of formula 1, comprising the following steps a) Preparation of cis-1-2-[4-(2-phenyl-6-methoxy-1,2,3,4-tetrahydronaphthalen-1-yl)-phenoxy]ethyl}pyrrolidine of formula (3) by alkylation of cis-1-(4-hydroxyphenyl)-2-phenyl-6-methoxy-1,2,3,4-tetrahydronaphthalene with 1-(2-chloroethyl)pyrrolidine base or its salt, b) Deprotection of the hydroxyl group in the substance of formula (3) by the effect of hydrobromic acid generating cis-6-phenyl-5-[4-(2-pyrrolidin-1-ylethoxy)phenyl]-5,6,7,8-tetrahydronaphthalen-2-ol hydrobromide of formula (2a), c) Conversion of the substance of formula (2a) into cis-6-phenyl-5-[4-(2-pyrrolidin-1-ylethoxy)phenyl]-5,6,7,8-tetrahydronaphthalen-2-ol of formula (2b), d) Preparation of lasofoxifene of formula (1) by conversion into the corresponding diasteroisomer by reaction with D-tartaric acid and crystallization.
制备(−)-顺式-(5R,6S)-6-苯基-5-[4-(2-吡咯烷-1-基乙氧)苯基]-5,6,7,8-四氢萘-2-醇D-酒石酸盐-拉索福辛的方法,包括以下步骤:a)通过将顺式-1-2-[4-(2-苯基-6-甲氧基-1,2,3,4-四氢萘-1-基)-苯氧基]乙基}吡咯烷的式(3)与1-(2-氯乙基)吡咯烷碱或其盐烷基化,制备式(3)的化合物;b)通过氢溴酸作用去保护式(3)中的羟基,生成式(2a)的顺式-6-苯基-5-[4-(2-吡咯烷-1-基乙氧)苯基]-5,6,7,8-四氢萘-2-醇氢溴酸盐;c)将式(2a)的化合物转化为式(2b)的顺式-6-苯基-5-[4-(2-吡咯烷-1-基乙氧)苯基]-5,6,7,8-四氢萘-2-醇;d)通过与D-酒石酸反应并结晶,将化合物转化为相应的对映异构体,制备式(1)的拉索福辛。