Synthesis 2002(18): 2778-2785
DOI: 10.1055/s-2002-35988
FEATUREARTICLE
© Georg Thieme Verlag Stuttgart · New York

Reactions of Silylmethyl Allylic Silanes: Synthesis of Tetrahydrofurans

Jacqueline H. Smitrovich, K. A. Woerpel*
Department of Chemistry, University of California, Irvine, California 92697-2025 USA
Fax: +1(949)8242210; e-Mail: kwoerpel@uci.edu;
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Publikationsverlauf

Publikationsdatum:
06. Dezember 2002 (online)

Abstract

Allylic silanes bearing a silylmethyl group at the allylic position were prepared as both (E)- and (Z)-alkene stereoisomers. These compounds undergo reactions with aldehydes in the presence of Lewis acids to provide tetrahydrofurans, bearing up to five stereogenic centers, as single diastereomers. These annulation processes are likely facilitated because the reactions proceed via carbocations that are stabilized by two β-silyl substituents.