Volume 39, Issue 20 pp. 3610-3612
Communication

Diisobutylaluminum-Promoted Regioselective De-O-benzylation of Perbenzylated Cyclodextrins: A Powerful New Strategy for the Preparation of Selectively Modified Cyclodextrins

Alan J. Pearce Dr.

Alan J. Pearce Dr.

Département de Chimie, Associé au CNRS Ecole Normale Supérieure 24 Rue Lhomond, 75231 Paris cedex 05 (France) Fax: (+33) 1-44-32-33-97

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Pierre Sinaÿ Prof.

Pierre Sinaÿ Prof.

Département de Chimie, Associé au CNRS Ecole Normale Supérieure 24 Rue Lhomond, 75231 Paris cedex 05 (France) Fax: (+33) 1-44-32-33-97

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The authors thank the European Community for a TMR Marie Curie Research Training Grant (no. ERBFMBICT983225) to A.J.P.

Abstract

A new solution to an old problem: Remarkably regioselective de-O-benzylation of perbenzylated cyclodextrins (CDs) such as 1 (or α- and γ-CDs) occurs with diisobutylaluminum hydride, thus providing an innovative approach to the preparation of selectively modified cyclodextrins such as 2 in excellent yield.

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