A new carbon–carbon bond forming reaction using O-methyl (S)-prop-2-ynyl dithiocarbonate
摘要:
Heating O-methyl (S)-prop-2-ynyl dithiocarbonates 1a-c with electrophilic alkenes 7a-d containing nucleophilic acetoxy group gives 1,3-dithiol-2-ones 9 by a new carbon-carbon bond forming process.
This invention provides a method of making (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid (pregabalin) or a salt thereof via an asymmetric hydrogenation synthesis. Pregabalin is useful for the treatment and prevention of seizure disorders, pain, and psychotic disorders. The invention also provides intermediates useful in the production of pregabalin.
Nucleophilic addition of triethyl phosphite to acetates of the baylis-hillman adducts: Stereoselective synthesis of (E)- and (Z)-allylphosphonates
作者:Deevi Basavaiah、Subramanian Pandiaraju
DOI:10.1016/0040-4020(95)01055-6
日期:1996.2
Nucleophilic addition of triethylphosphite to 3-acetoxy-2-methylenealkanenitriles and methyl 3-acetoxy-2-methylenealkanoates provides (2E)-2-(diethoxyphosphorylmethyl)alk-2- enenitriles and methyl (2Z)-2-(diethoxy-phosphorylmethyl)alk-2-enoates respectively with good stereoselectivity.
Ambiphilicmolecules (allylamines 1), easily accessible from the Baylis–Hillman acetates, have been effectively utilized for stereoselective synthesis of cis-5,6-disubstituted-1,3-thiazinane-2-thione derivatives (2) via the reaction with carbon disulfide as a bridging partner.
[EN] ASYMMETRIC SYNTHESIS OF PREGABALIN<br/>[FR] SYNTHESE ASYMETRIQUE DE PREGABALINE
申请人:WARNER LAMBERT CO
公开号:WO2001055090A1
公开(公告)日:2001-08-02
This invention provides a method of making (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid (pregabalin) or a salt thereof via an asymmetric hydrogenation synthesis. Pregabalin is useful for the treatment and prevention of seizure disorders, pain, and psychotic disorders. The invention also provides intermediates useful in the production of pregabalin.