Catalytic activities of dicyanoketene acetals in alcoholysis of epoxides.
作者:Tsuyoshi MIURA、Yukio MASAKI
DOI:10.1248/cpb.43.523
日期:——
The catalytic activity of various types of capto-dative ethylenes has been investigated on alcoholysis of epoxides, and dicyanoketene dimethyl acetal (DCKDMA) and dicyanoketene ethylene acetal (DCKEA) are found to be efficient and mild catalysts.
研究发现,二氰基乙烯二甲缩醛(DCKDMA)和二氰基乙烯乙缩醛(DCKEA)是高效温和的催化剂。
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
A mild ring opening fluorination of epoxide with ionic liquid 1-ethyl-3-methylimidazorium oligo hydrogenfluoride (EMIMF(HF)2.3)
作者:Hideaki Yoshino、Kenichi Nomura、Seijiro Matsubara、Koichiro Oshima、Kazuhiko Matsumoto、Rika Hagiwara、Yasuhiko Ito
DOI:10.1016/j.jfluchem.2004.02.002
日期:2004.7
Ringopening fluorination of epoxides with hydrogenfluoride in ionic liquid 1-ethyl-3-methylimidazorium oligo hydrogenfluoride EMIMF(HF)2.3 was demonstrated. This ionic liquid released hydrogenfluoride graduately to make mild conditions without oligomerization of epoxides.
Unusual reactivity of selenoboranes towards epoxides: new selective routes to b-hydroxyselenides and allylalcohols
作者:A. Cravador、A. Krief
DOI:10.1016/s0040-4039(01)92941-7
日期:1981.1
Preparation of epoxides by oxidative decarboxylation of .beta.-hydroxy acids. Stereo- and regiochemistry of oxidative elimination of secondary radicals with cupric acetate