[EN] PROCESS FOR THE PREPARATION OF A CYANO-ISOBENZOFURAN<br/>[FR] PROCEDE POUR PREPARER UN CYANO-ISOBENZOFURANE
申请人:ADORKEM TECHNOLOGY SPA
公开号:WO2004080988A1
公开(公告)日:2004-09-23
A process for the preparation of citalopram and the pharmaceutically acceptable salts therof is disclosed by reacting 5-cyanophthalide with a 4-fluorophenyl magnesium halide, reducing the 3-hydroxymethyl-4-(4-fluorobenzoyl)benzonitrile with an agent reducing ketones to alcohols, submitting the thus-obtained 3-hydroxymethyl-4- [(4-fluorophenyl)hydroxymethyl) benzonitrile to a cyclization reaction to give 1-(4-fluorophenyl)-1,3-dihydro-5isobenzofurancarbonitrile without 1,1-bis(4-fluorophenyl)-1,3-dihydro-5- isobenzofurancarbonitrile and treating 1,1-bis(4 fluorophenyl)-1,3-dihydro-5- isobenzofurancarbonitrile with a 3-(dimetylamino)propyl halide in the presence of a base.
揭示了一种制备西酞普兰及其药用可接受盐的方法,通过将5-氰基邻苯二酚与4-氟苯基镁卤化物反应,将3-羟甲基-4-(4-氟苯甲酰基)苯甲腈还原为还原酮至醇的试剂,将得到的3-羟甲基-4-[(4-氟苯基)羟甲基]苯甲腈进行环化反应,得到1-(4-氟苯基)-1,3-二氢-5-异苯并呋喃碳腈,不含1,1-双(4-氟苯基)-1,3-二氢-5-异苯并呋喃碳腈,并将1,1-双(4-氟苯基)-1,3-二氢-5-异苯并呋喃碳腈与3-(二甲基氨基)丙基卤化物在碱的存在下处理。