专利号:US-9527800-B2 优先权日:2013-10-29 标 题:Process for total synthesis of venlafaxine 发明人:CHAVAN SUBHASH PRATAPRAO; PAWAR KAILASH PRALHAD 权利人:COUNCIL SCIENT IND RES 摘要:There is a need for short, resolution free asymmetric process for synthesis of one isomer of venlafaxine, (−)-venlafaxine. The invention provides a novel, short process of synthesis of (−)-venlafaxine, with yield greater than 50% and ee>99%. This process can be used for racemic synthesis of venlafaxine with overall yield 65%.
专利号:US-7605290-B2 优先权日:2006-07-26 标题 :Processes for the synthesis of O-desmethylvenlafaxine 发明人:NIDDAM-HILDESHEIM VALERIE; SHENKAR NATALIA; SHACHAN-TOV SHARONA 权利人:TEVA PHARMA 摘要:The present invention describes processes for the preparation of O-desmethylvenlafaxine and tridesmethylvenlafaxine, which may be used as an intermediate in preparing O-desmethylvenlafaxine.
专利号:US-2009069601-A1 优先权日:2006-07-26 标题:Processes for the synthesis of O-desmethylvenlafaxine 发明人:NIDDAM-HILDESHEIM VALERIE; NIDAM TAMAR; DOLITZKY BEN-ZION 权利人:NIDDAM-HILDESHEIM VALERIE; NIDAM TAMAR; DOLITZKY BEN-ZION 摘要:The present invention describes processes for the preparation of O-desmethylvenlafaxine and tridesmethylvenlafaxine, which may be used as an intermediate in preparing O-desmethylvenlafaxine.
专利号:US-2008221356-A1 优先权日:2006-07-26 标题:Processes for the synthesis of O-desmethylvenlafaxine 发明人:NIDDAM-HILDESHEIM VALERIE; NIDAM TAMAR; DOLITZKY BEN-ZION 权利人:NIDDAM-HILDESHEIM VALERIE; NIDAM TAMAR; DOLITZKY BEN-ZION 摘要:The present invention describes processes for the preparation of O-desmethylvenlafaxine and tridesmethylvenlafaxine, which may be used as an intermediate in preparing O-desmethylvenlafaxine.
专利号:US-2009137846-A1 优先权日:2006-07-26 标题 :Processes for the synthesis of O-Desmethylvenlafaxine 发明人:NIDDAM-HILDESHEIM VALERIE; NIDAM TAMAR; DOLITZKY BEN-ZION; FRENKEL GUSTAVO 权利人:NIDDAM-HILDESHEIM VALERIE; NIDAM TAMAR; DOLITZKY BEN-ZION; FRENKEL GUSTAVO 摘要:The present invention describes processes for the preparation of O-desmethylvenlafaxine and tridesmethylvenlafaxine, which may be used as an intermediate in preparing O-desmethylvenlafaxine.
专利号:WO-2008059525-A3 优先权日:2006-09-29 标题:An improved process for the preparation of venlafaxine and its analogs 发明人:LAL BANSI; GUND VITTHAL GENBHAU 权利人:CALYX CHEMICALS AND PHARMACEUT; LAL BANSI; GUND VITTHAL GENBHAU 摘要:A novel single step process for the synthesis of venlafaxine of formula I and N-desmethylvenlafaxine of formula II from 2-(1-hydroxycyclohexyl)-2-(4-methoxyphenyl)acetonitrile [cyano-intermediate] of formula V V comprising reacting 2-(1-hydroxycyclohexyl)-2-(4-methoxyphenyl)acetonitrile with an alkylamine and/or its salt in a solvent in the presence of a transition metal catalyst, under hydrogen atmosphere.