Process for producing optically active 3-halogenocarboxylic acid ester and 3-azidocarboxylic acid ester
申请人:——
公开号:US20030225301A1
公开(公告)日:2003-12-04
A process for producing an optically active 3-azide-carboxylic acid ester by reacting an optically active 3-hydroxycarboxylic acid ester and a thionyl halide in the presence of a basic substance in an organic solvent to produce an optically active 3-halogenocarboxylic acid ester which is then reacted with an azide salt represented by the formula: MN
3
(wherein M is an alkaline metal) in water or a mixture of water and a water soluble organic solvent.
Synthesis of optically active chloro alkanoic esters
作者:Ugo Azzena、Giovanna Delogu、Giovanni Melloni、Oreste Piccolo
DOI:10.1016/s0040-4039(01)80743-7
日期:1989.1
The stereospecific synthesis (optical yield up to 94%) of opticallyactive (R)-alkyl-2-chloropropionate and (S)-alkyl-3-chlorobutanoate by the action of AlCl3 on the corresponding (S)-2-mesyloxy- and (R)-3-mesyloxy-derivatives is described.
通过AlCl 3对相应的(S)-2-mesyloxy-描述了(R)-3-甲磺酰氧基衍生物。
Fischer,E.; Scheibler, Justus Liebigs Annalen der Chemie, 1911, vol. 383, p. 343
作者:Fischer,E.、Scheibler
DOI:——
日期:——
CaF2 catalyzed SN2 type chlorodehydroxylation of chiral secondary alcohols with thionyl chloride: a practical and convenient approach for the preparation of optically active chloroalkanes
A CaF2 catalyzed chlorodehydroxylation of chiral secondary alcohols with thionyl chloride has been developed. The chlorination reaction is effective for a wide range of alcohols, generating the corresponding chloroalkanes in good yield with high optical purity with inversion of the original configuration of the alcohol.