Selective Synthesis of 5‐Substituted
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‐Aryloxazolidinones by Cycloaddition Reaction of Epoxides with Arylcarbamates Catalyzed by the Ionic Liquid BmimOAc
作者:Elnazeer H. M. Elageed、Bihua Chen、Binshen Wang、Yongya Zhang、Shi Wu、Xiuli Liu、Guohua Gao
DOI:10.1002/ejoc.201600474
日期:2016.7
5-substituted N-aryloxazolidinones in excellent yields. In addition, chiral 5-substituted oxazolidinones were synthesized by this procedure in good-to-excellent yields with enantiomeric excesses in excess of 99.9 % starting from chiral terminalepoxides. A possible reaction mechanism is discussed in accord with the results obtained by 1H NMR spectroscopy and DFT calculations, which indicate the cooperative activation
A Multicomponent Approach to Oxazolidinone Synthesis Catalyzed by Rare‐Earth Metal Amides
作者:Meixia Zhou、Xizhou Zheng、Yaorong Wang、Dan Yuan、Yingming Yao
DOI:10.1002/cctc.201900221
日期:2019.12.5
Three‐component reaction of epoxides, amines, and dimethyl carbonate catalyzed by rare‐earth metal amides has been developed to synthesize oxazolidinones. 47 examples of 3,5‐disubstituted oxazolidinones were prepared in 13–97 % yields. This is a simple and most practical method which employs easily available substrates and catalysts, and is applicable to a wide range of aromatic and aliphatic amines
Tetraarylphosphonium Salt-Catalyzed Synthesis of Oxazolidinones from Isocyanates and Epoxides
作者:Yasunori Toda、Shuto Gomyou、Shoya Tanaka、Yutaka Komiyama、Ayaka Kikuchi、Hiroyuki Suga
DOI:10.1021/acs.orglett.7b02722
日期:2017.11.3
Preparation of a range of oxazolidinones, including enantioenriched N-aryl-substituted oxazolidinones, in which tetraarylphosphonium salts (TAPS) catalyze the [3 + 2] coupling reaction of isocyanates and epoxides effectively, is described. The key finding is a Brønsted acid/halide ion bifunctional catalyst that can accelerate epoxide ring opening with high regioselectivity. Mechanistic studies disclosed
Triethylamine Hydroiodide as a Bifunctional Catalyst for the Solvent-Free Synthesis of 2-Oxazolidinones
作者:Ryuichi Nishiyori、Ken Okuno、Seiji Shirakawa
DOI:10.1002/ejoc.202000771
日期:2020.8.23
An efficient synthesis of 2‐oxazolidinones from epoxides and isocyanates under solvent‐free conditions, featuring the use of triethylamine hydroiodide as a simple and effective bifunctional organocatalyst is developed.