Hydrophobic <i>N,N-</i>Diarylammonium Pyrosulfates as Dehydrative Condensation Catalysts under Aqueous Conditions
作者:Akira Sakakura、Yoshiki Koshikari、Matsujiro Akakura、Kazuaki Ishihara
DOI:10.1021/ol2027366
日期:2012.1.6
Oil-soluble N,N-diarylammonium pyrosulfates as nonsurfactant-type catalysts for the dehydrative ester condensation under aqueous conditions are described. Preheat treatment of dibasic sulfuric acid with bulky N,N-diarylamines generates water-tolerant salts of pyrosulfuric acid as active catalyst species. The present catalysts in water can also widely be applied to unusual selective esterifications and dehydrative glycosylation.