Hydrazine sulphate: a cheap and efficient catalyst for the regioselective ring-opening of epoxides. A metal-free procedure for the preparation of β-alkoxy alcohols
作者:Alcino J.L. Leitão、Jorge A.R. Salvador、Rui M.A. Pinto、M. Luísa Sá e Melo
DOI:10.1016/j.tetlet.2007.12.121
日期:2008.3
An efficient and general procedure for the regioselective ring opening of epoxides with alcohols to afford the corresponding beta-alkoxy alcohols, using hydrazine sulphate as catalyst, is described. This new metal-free process was found to be highly versatile allowing the use of primary, secondary and tertiary alcohols as nucleophiles and a large variety of epoxides, including 5 alpha,6 alpha-, 5 beta,6 beta- and 2 alpha,3 alpha-epoxysteroids, as substrates. (c) 2008 Elsevier Ltd. All rights reserved.
Photochemical Reaction of Ethyl 3-Methyl-3-phenylglycidate in Methanol and Ether Solvents
作者:Vo Van Chung、Masao Tokuda、Akira Suzuki、Mitsuomi Itoh
DOI:10.1246/bcsj.49.341
日期:1976.1
Irradiation of ethyl 3-methyl-3-phenyl-glycidate (1) in methanol gave an ionic addition product of the solvent, whereas in ether solvent different reaction paths leading to β-keto esters and carbene were observed.
Synthesis and Characterization of a Highly Reactive and Robust Chlorine‐Bound Ni Single‐Atom‐Catalyst for the Continuous Flow Ring‐Opening Reaction of Epoxides
作者:Syed Asad Abbas、Lei Cao、Dongho Seo、Abdikani Omar Farah、Paul Ha‐Yeon Cheong、Jin Kyoon Park、Ki Min Nam
DOI:10.1002/cctc.202201138
日期:2023.2.20
support, which can have the advantage of homogenous catalyst and heterogenous catalyst. The obtained Cl−Ni−SAC mediated a fast and efficient ring-openingreaction of epoxides with high recyclability, thereby demonstrating its applicability to a continuous-flow reaction.