On the reactivity of imidazole carbamates and ureas and their use as esterification and amidation reagents
摘要:
The optimization, substrate scope, and mechanism of esterification and amidation of carboxylic acids mediated by imidazole-based reagents are discussed. The innate reactivity of carbonylimidazole reagents with a range of nucleophiles is also explored. New reagents developed for the synthesis of alpha,beta-unsaturated esters are described, as are reagents for the preparation of tertiary amides directly from carboxylic acids. (C) 2011 Elsevier Ltd. All rights reserved.
On the reactivity of imidazole carbamates and ureas and their use as esterification and amidation reagents
摘要:
The optimization, substrate scope, and mechanism of esterification and amidation of carboxylic acids mediated by imidazole-based reagents are discussed. The innate reactivity of carbonylimidazole reagents with a range of nucleophiles is also explored. New reagents developed for the synthesis of alpha,beta-unsaturated esters are described, as are reagents for the preparation of tertiary amides directly from carboxylic acids. (C) 2011 Elsevier Ltd. All rights reserved.
A versatile method for preparation of O-alkylperoxycarbonic acids: epoxidation with alkyloxycarbonylimidazoles and hydrogen peroxide
作者:Youko Tsunokawa、Shigeo Iwasaki、Shigenobu Okuda
DOI:10.1016/s0040-4039(00)87275-5
日期:1982.1
A variety of O-alkylperoxycarbonic acids () were conveniently prepared by utilizing alkyloxycarbonylimidazoles () as their precursors. Epoxidation of alkenes with such peroxy-acids was studied and their reactivities were compared with those of peroxycarboxylicacids.
[EN] METHODS AND COMPOSITIONS FOR STUDYING, IMAGING, AND TREATING PAIN<br/>[FR] PROCÉDÉS ET COMPOSITIONS POUR ÉTUDIER, VISUALISER PAR IMAGERIE ET TRAITER LA DOULEUR
申请人:UNIV LELAND STANFORD JUNIOR
公开号:WO2010129864A9
公开(公告)日:2012-03-08
Allylation of N-Acyl Quaternary Salts of Azaaromatics with Allyltrimethylsilane in the Presence of Triflate Ion