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Ethyl Cyanoformate/Hydrogen Peroxide and Related Combination Systems, Novel Epoxidizing Systems of Olefins
作者:Yukio Masaki、Tsuyoshi Miura、Isao Mukai、Akichika Itoh、Hirohisa Oda
DOI:10.1246/cl.1991.1937
日期:1991.11
A combination system of ethyl cyanoformate and hydrogen peroxide was found to epoxidize olefins in a stereospecific manner at room temperature. Asymmetric epoxidation was observed with menthyl cyanoformate/hydrogen peroxide system.
Alcoholysis of Epoxides Catalyzed by Tetracyanoethylene and Dicyanoketene Acetals
作者:Yukio Masaki、Tsuyoshi Miura、Masahito Ochiai
DOI:10.1246/bcsj.69.195
日期:1996.1
A typical π-acid tetracyanoethylene and capto-dative olefin dicyanoketeneacetals were found to catalyze stereospecific alcoholysis of epoxides at the ambient temperature to 50 °C in good yields. Mildness and significant chemoselectivity of the catalysts were demonstrated by intactness of tetrahydropyranyl ether and ethylene acetal groups. A novel regioselectivity associated with anchimeric assistance