efficient resolution of 2,3-epoxyalcohols 2a-b were obtained both by enzymatic hydrolysis and transesterification in organic solvent: (25,3R) 2b and (2R,35) 2a thus obtained are chiral synthons for the synthesis of (+)- Disparlure 1.
Syntheses of optically active pheromones with an epoxy ring, (+)-disparlure and both the enantiomers of (3z,6z)--9,10-epoxy-3,6-heneicosadiene
作者:Kenji Mori、Takashi Ebata
DOI:10.1016/s0040-4020(01)87314-2
日期:1986.1
(+)-Disparlure 1 and both the enantiomers of (3Z,6Z)-cis-9,10-epoxy-3, 6-heneicosadiene 2 were synthesized in optically pure forms employing the Sharpless asymmetric epoxidation as the key-step. The natural pheromone 2 isolated from Estigmene acrea was shown to possess (9S,10R)-stereochemistry.
Process for preparing optically active epoxy alcohols
申请人:Nitto Denko Co. Ltd.
公开号:EP0484063A2
公开(公告)日:1992-05-06
A process for preparing optically active epoxy alcohol which is characterised by the steps of adding carboxylic anhydride to racemic epoxy alcohol of formula 1 in the presence of a hydrolase in an organic solvent, esterifying (-)-form of the epoxy alcohol preferentially to give an epoxy ester of formula 2, separating optically active epoxy ester of formula 2 from optically active epoxy alcohol of formula 3 to yield optically active epoxy alcohol of formula 4, so that epoxy alcohol of formula 1 in high purity can be obtained easily and safely at ordinary temperature.