Bulky diarylammonium arenesulfonates as mild and extremely active dehydrative ester condensation catalysts
作者:Akira Sakakura、Shoko Nakagawa、Kazuaki Ishihara
DOI:10.1016/j.tet.2005.09.059
日期:2006.1
especially large-scale, fundamental reactions like estercondensations, are highly desirable for many reactions. Bulky diarylammonium pentafluorobenzenesulfonates and tosylates serve as extremely active dehydration catalysts for the estercondensation reaction of carboxylicacids with equimolaramounts of sterically demanding alcohols and acid-sensitive alcohols. Typically, the esterification reaction is performed
Bulky Diarylammonium Arenesulfonates as Selective Esterification Catalysts
作者:Kazuaki Ishihara、Shoko Nakagawa、Akira Sakakura
DOI:10.1021/ja050223v
日期:2005.3.1
large-scale, fundamental reactions such as estercondensations, are highly desirable for many reactions. Bulky diarylammonium pentafluorobenzenesulfonates and tosylates serve as extremely active dehydration catalysts for the estercondensation reaction of carboxylicacids with equimolaramounts of sterically demanding alcohols and acid-sensitive alcohols. Typically, the esterification reaction is performed
Efficient condensation of carboxylic acids with alcohols catalyzed by fluorous ammonium triflates
作者:László Mercs、Gianluca Pozzi、Silvio Quici
DOI:10.1016/j.tetlet.2007.02.117
日期:2007.4
salts as metal-free catalysts for the directcondensation of equimolaramounts of carboxylicacids and aliphatic alcohols has been investigated. Esterification reactions were thus conveniently carried out under mild fluorous biphasic conditions, in the presence of 1 mol % of fluorous ammonium triflate and without recourse to any additional water removal technique. Good to excellent ester yields were obtained
Process for the preparation of methoxyacetic acid esters
申请人:Huels Aktiengesellschaft
公开号:US06143920A1
公开(公告)日:2000-11-07
The invention relates to a process for the preparation of methoxyacetic acid esters in which a chloroacetic acid ester is reacted with an alkali metal methoxide to give the methoxyacetic acid ester.
本发明涉及一种制备甲氧基乙酸酯的方法,其中氯乙酸酯与碱金属甲氧化物反应形成甲氧基乙酸酯。
Ytterbium(III) Triflate-Catalyzed Selective Methanolysis of Methoxyacetates: A New Deprotective Method