3-Chloro-1-phenylpropan-1-ol and the corresponding butanoate, 3-chloro-1-phenyl-1-propyl butanoate, were kinetically resolved using lipase B from Candida antarctica catalysis by transesterification and hydrolysis respectively. The resulting chiral building blocks (S)- and (R)-3-chloro-1-phenylpropanol were converted into both enantiomers of the antidepressant drugs, Fluoxetine, Tomoxetine and Nisoxetine.
Chemoenzymatic synthesis2 of both enantiomers of fluoxetine, tomoxetine and nisoxetine: lipase-catalyzed resolution of 3-aryl-3-hydroxypropanenitriles
作者:Ahmed Kamal、G.B.Ramesh Khanna、R. Ramu
DOI:10.1016/s0957-4166(02)00537-2
日期:2002.9
transesterification process in hydrophobic solvents (diisopropyl ether, toluene and hexane) enhanced the reactionrate drastically and gave optimal yields with high enantioselectivity (>99%). Moreover, enantiopure 3-hydroxy-3-phenylpropanenitrile products have been converted via enantioconvergent routes into the (R)- and (S)-enantiomers of the important anti-depressants fluoxetine, tomoxetine, nisoxetine and norfluoxetine
Efficient method for preparing 3-aryloxy-3-arylpropylamines and their optical stereoisomers
申请人:Wang Zhi-Xian
公开号:US20070010678A1
公开(公告)日:2007-01-11
Provided is an efficient method for the preparation of 3-aryloxy-3-arylpropylamines, their optical stereoisomers, and pharmaceutically acceptable salts thereof. The process allows for the isolation of 3-aryloxy-3-arylpropylamines in high yield and purity. The present invention further relates to a process for producing fluoxetine, tomoxetine, norfluoxetine, duloxetine, nisoxetine, and their optically enriched (R)— and (S)-enantiomers.
An efficient route to enantiomerically pure antidepressants: tomoxetine, nisoxetine and fluoxetine
作者:Manfred P. Schneider、Ulrich Goergens
DOI:10.1016/s0957-4166(00)80257-8
日期:1992.4
Both enantiomers (R)- and (S)- 3-chloro- 1-phenyl- 1-propanol can be obtained conveniently by an efficient enzymatic resolution process. They can be converted via enantioconvergent routes into all enantiomers of the important antidepressants (R)- and (S)- Tomoxetine, Fluoxetine and Nisoxetine.