Zhiying Duan, Yanlong Gu, Youquan Deng
Sep 1, 2006
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Influential Citations
102
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Journal
Catalysis Communications
Abstract
Choline chloride AE xZnCl2 (x = 1–3) or benzyltrimethylammonium chloride AE 2ZnCl2 have been used as efficient and recyclable catalysts for protection of carbonyls to 1,3-dioxolanes and 1,3-dioxanes at room temperature under solvent-free conditions. FT-IR investigation demonstrates the four ionic liquids have similar Lewis acid strength, which is in agreement with the activities observed in the acetalization reaction. The catalytic system choline chloride AE 2ZnCl2 can be reused up to five times without appreciable loss of activity. The simple procedures as well as easy recovery and reuse of this novel catalytic system are expected to contribute to the development of more benign acetalization procedure of carbonyl compounds. � 2006 Published by Elsevier B.V.