o-Benzenedisulfonimide as reusable Bronsted acid catalyst for acid-catalyzed organic reactions.

[摘要]：Acid-catalyzed org. reactions, such as etherification, esterification, acetal synthesis, cleavage, and interconversion, and pinacol rearrangement were carried out in the presence of catalytic amts. of o-benzenedisulfonimide as Bronsted acid catalyst; the conditions were mild and selective. The catalyst was easily recovered and purified, ready to be used in further reactions, with economic and ecol. advantages.

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