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Synlett 2009(12): 1974-1978
DOI: 10.1055/s-0029-1217550
DOI: 10.1055/s-0029-1217550
LETTER
© Georg Thieme Verlag
Stuttgart ˙ New York
An Efficient Method for Chemoselective Thioacetalization of Aldehydes in the Presence of a Catalytic Amount of Acidic Ionic Liquid under Solvent-Free Conditions
Further Information
Received
18 February 2009
Publication Date:
03 July 2009 (online)
Publication History
Publication Date:
03 July 2009 (online)
Abstract
A water-stable Brønsted acidic ionic liquid with an alkane sulfonic acid group was synthesized. This ionic liquid catalyzed the thioacetalization reaction smoothly to afford 1,3-dithianes in excellent yield and less time. In this article we describe a mild and chemoselective thioacetalization procedure for the protection of various aldehydes in the presence of catalytic amount of ionic liquid (2 mol%).
Key words
acid catalysis - thioacetalization - Brønsted acidic ionic liquid
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