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Synthesis 2007(17): 2751-2754
DOI: 10.1055/s-2007-983797
DOI: 10.1055/s-2007-983797
PSP
© Georg Thieme Verlag Stuttgart · New York
Multigram Synthesis of Diastereomerically Pure Tetrahydrofuran-diols
Further Information
Received
22 December 2006
Publication Date:
12 July 2007 (online)
Publication History
Publication Date:
12 July 2007 (online)
Abstract
A highly efficient protocol for the large-scale oxidative cyclization of 1,5-dienes is described. This convenient ruthenium(VIII)-catalyzed (0.2 mol%) cyclization reaction allows the preparation of cis-2,5-disubstituted tetrahydrofurans in high yields (up to 92%) and excellent diastereomeric ratio (>95:5 dr). This simple and reliable method is insensitive to moisture and air and can, therefore, be carried out in an open reaction vessel.
Key words
ruthenium - oxidation - cyclization - heterocycle - diastereoselectivity
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