[EN] STEREOSELECTIVE METHOD FOR SYNTHESIZING DOLAPHENINE<br/>[FR] PROCEDE STEREOSELECTIF DE SYNTHESE DE LA DOLAPHENINE
申请人:PHARM-ECO LABORATORIES, INC.
公开号:WO1996039399A1
公开(公告)日:1996-12-12
(EN) The present invention relates to a method for the stereospecific synthesis of an enantiomer of a chiral amine, wherein the chiral amine has the formula: R1CH(NH2)R2. R1 and R2 are each independently selected from the group consisting of alkyl, aryl and heterocyclic and radicals. This method is particularly useful for stereospecifically synthesizing S-dolaphenine. The method involves contacting a chiral enantioner of norephedrine with borane, within an aprotic solvent to form a complex for stereospecifically reducing oximies. The complex is then contacted with an oxime, thereby stereospecifically reducing said oxime to form an enantiomer of a chiral amine.(FR) La présente invention concerne un procédé de synthèse stéréospécifique d'un énantiomère d'une amine chirale ayant la formule R1CH(NH2)R2. R1 et R2 sont choisis chacun indépendamment dans le groupe constitué de radicaux éthérocycliques, aryle et alkyle. Ce procédé est particulièrement utile pour la synthèse stéréospécifique de S-dolaphénine. Le procédé consiste à mettre en contact un énantiomère chiral de norephédrine avec un borane dans un solvant aprotique pour former un complexe afin d'effectuer une réduction stéréospécifique des oximes. Le complexe est ensuite mis en contact avec un oxime, pour effectuer la réduction stéréospécifique de l'oxime et former un énantiomère d'une amine chirale.
Stereoselective method for synthesizing dolaphenine
申请人:Pharm-Eco Laboratories, Inc.
公开号:US05750713A1
公开(公告)日:1998-05-12
The present invention relates to a method for the stereospecific synthesis of an enantiomer of a chiral amine, wherein the chiral amine has the formula R.sup.1 CH(NH.sub.2)R.sup.2. R.sup.1 and R.sup.2 are each independently selected from the group consisting of alkyl, aryl and heterocyclic and radicals. This method is particularly useful for stereospecifically synthesizing S-dolaphenine. The method involves contacting a chiral enantiomer of norephedrine with borane, within an aprotic solvent to form a complex for stereospecifically reducing oximes. The complex is then contacted with an oxime, thereby stereospecifically reducing said oxime to form an enantiomer of a chiral amine.
Alkylation of Camphor and Pinanone Imines of 2-(Aminomethyl)thiazole. Enantioselective Synthesis of 2-(1-Aminoalkyl)thiazoles
作者:Alessandro Dondoni、Francisco L. Merchan、Pedro Merino、Isabel Rojo、Tomas Tejero
DOI:10.1055/s-1996-4259
日期:1996.5
A method is described for the enantioselective synthesis of 2-(1-aminoalkyl)thiazoles 6 via stereoselective alkylation of the carbanions of (+)-(R)-camphor and (-)-(1S, 2S 5S)-2-hydroxypinan-3-one-imines 2 and 3 derived from 2-(aminomethyl)thiazole (2-AMT, 1). Compounds 6 serve as α-amino aldehyde precursors via thiazolyl-to-formyl conversion.