Hydrophobic N,N-diarylammonium pyrosulfates as dehydrative condensation catalysts under aqueous conditions |
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| Authors: | Sakakura Akira Koshikari Yoshiki Akakura Matsujiro Ishihara Kazuaki |
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| Institution: | EcoTopia Science Institute, Nagoya University, Japan, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan. |
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| Abstract: | 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. |
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