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 neighboring group participation were led to carbonyl compounds
在 1,2-二取代环氧化物单元的 5-exo 模式和季铵盐 5-exo 中,在分子内醚氧官能团的优先异位辅助下,乙腈中的四氰基乙烯 (TCNE) 催化提供羰基化合物的环氧-醚的重排,三取代型的 5-endo 和 6-endo 模式。在丙酮中,邻近基团参与的环氧基醚导致羰基化合物,其他环氧化物提供丙酮化物。