PROCESS FOR PREPARATION OF E-ISOMER OF 1-(4-METHYLPHENYL) - 1-(2-PYRID YL)-3-PYRROLIDINO PROP-1-ENE AND ACID ADDITION SALTS THEREOF
申请人:Gupta Rajender Pershad
公开号:US20110046384A1
公开(公告)日:2011-02-24
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)-1-(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.
一种制备公式I中1-(4-甲基苯基)-1-(2-吡啶基)-3-吡咯烷基丙烯酰胺的E异构体及其酸盐的过程,该过程包括:脱水公式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-吡咯烷基丙烯酰胺的E和Z异构体混合物,并用水洗涤该混合物以溶解Z异构体并获得公式I中E异构体的制备方法,该方法中E异构体基本上不含Z异构体。