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.
Substrate-Specific Rearrangement and Acetonidation of Epoxy-Ethers Catalyzed by Tetracyanoethylene
作者:Yukio Masaki、Tsuyoshi Miura、Masahito Ochiai
DOI:10.1246/cl.1993.17
日期:1993.1
providing carbonyl compounds was catalyzed by tetracyanoethylene (TCNE) in acetonitrile under the preferential anchimetric assistance of intramolecular etheric oxygen function in the 5-exo mode for the 1,2-disubstituted epoxide unit and in the quaternary 5-exo, 5-endo, and 6-endo mode for the trisubstituted type. In acetone, epoxy-ethers favored by neighboringgroupparticipation were led to carbonyl compounds