A sustainable metal and base-free direct amidation of esters using water as a green solvent
作者:Nanthini Rajendran、Kiruthigadevi Kamaraj、Saranya Janakiraman、Mary Saral、Pierre H. Dixneuf、Charles Beromeo Bheeter
DOI:10.1039/d3ra02637j
日期:——
Herein, we report a simple and efficient synthetic approach for direct amidation of esters via C(acyl)–O bond cleavage without any additional reagents or catalysts, using only water as a green solvent. Subsequently, the reaction byproduct is recovered and utilized for the next phase of ester synthesis. This method emphasized metal-free, additive-free, and base-free characteristics making it a new,
Method of preparing acyloxybenzenesulfonic acids and salts thereof
申请人:ETHYL CORPORATION
公开号:EP0165480A1
公开(公告)日:1985-12-27
Alkali metal salts and alkaline earth metal salts of' acyloxybenzenesulfonate are prepared by sulfonating an aryl ester of an organic acid with gaseous sulfur trioxide to produce a sulfonation reaction mixture containing acyloxybenzenesulfonic acid, neutralizing the sulfonation reaction mixture with alkali metal hydroxide or alkaline earth metal hydroxide to produce an alkali metal salt or alkaline earth metal salt of an acyloxybenzenesulfonic acid and thereafter recovering from the reaction mixture the acyloxybenzenesulfonic acid salt product thus formed.