METHOD FOR PRODUCING OPTICALLY ACTIVE CYCLOPROPANE CARBOXYLIC ACID ESTER COMPOUND, ASYMMETRIC COPPER COMPLEX, AND OPTICALLY ACTIVE SALICYLIDENEAMINOALCOHOL COMPOUND
Asymmetric Epoxidation oftrans-Chalcones Organocatalyzed by β-Amino Alcohols
作者:Alessio Russo、Alessandra Lattanzi
DOI:10.1002/ejoc.200800140
日期:2008.6
examined as organocatalysts in the epoxidation of trans-chalcones with tert-butyl hydroperoxide as the oxidant. Primary, secondary, and tertiary β-amino alcohols are able to promote the reaction with variable activity and level of asymmetric induction. Subtle modifications to the structures of simple primary β-amino alcohol strongly influenced their efficiency in the epoxidation. They are promising catalysts
METHOD FOR PRODUCING OPTICALLY ACTIVE CYCLOPROPANE CARBOXYLIC ACID ESTER COMPOUND, ASYMMETRIC COPPER COMPLEX, AND OPTICALLY ACTIVE SALICYLIDENEAMINOALCOHOL COMPOUND
申请人:Masumoto Katsuhisa
公开号:US20110166372A1
公开(公告)日:2011-07-07
A process for producing an optically active cyclopropanecarboxylic acid ester compound represented by the formula (4):
(wherein R
5
, R
6
and * each represents the same meaning as defined below), comprising reacting a diazoacetic acid ester represented by the formula (2):
N
2
CHCO
2
R
5
(2)
(wherein R
5
represents an alkyl group having 1 to 15 carbon atoms or the like) with a compound represented by the formula (3):
(wherein R
6
represents an alkyl group having 1 to 15 carbon atoms or the like), in the presence of an asymmetric copper complex obtained by reacting a copper compound and an optically active salicylideneaminoalcohol compound represented by the formula (1):
(wherein R
1
represents an alkyl group having 1 to 4 carbon atoms or the like, R
2
represents a hydrogen atom or the like, R
3
and R
4
independently represent a hydrogen atom or the like, and * represents an asymmetric center).