A process for preparation of E-isomer of 1-(4-methylphenyl)-1-(2-pyridyl)-3- pyrrolidinoprop-1-ene of Formula-I, and acid addition salts thereof, said process comprising; dehydrating 1-(4-methylphenyl)-l -(2-pyridyl)-3-pyrrolidinopropan-1-ol of Formula III followed by adding a base solution to obtain a mixture of E and Z isomers of 1-(4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene, and washing said mixture of E and Z isomers of 1-(4-methylphenyl)-1-(2-pyridyl)-3- pyrrolidinoprop-1-ene with water to dissolve Z isomer and to obtain E-isomer of 1- (4-methylphenyl)-1-(2-pyridyl)-3-pyrrolidinoprop-1-ene of Formula I, which is substantially free from Z isomer.
一种制备Formula-I中1-(4-甲基苯基)-1-(2-
吡啶基)-3-
吡咯烷基丙-1-烯的E-异构体及其酸盐的方法,该方法包括:脱
水Formula III中的1-(4-甲基苯基)-1-(2-
吡啶基)-3-
吡咯烷基
丙醇,然后加入碱溶液以获得1-(4-甲基苯基)-1-(2-
吡啶基)-3-
吡咯烷基丙-1-烯的E和Z异构体混合物,将该混合物用
水洗涤以溶解Z异构体并获得Formula I中1-(4-甲基苯基)-1-(2-
吡啶基)-3-
吡咯烷基丙-1-烯的E-异构体,该异构体基本不含Z异构体。