Reactions of Silylmethyl Allylic Silanes: Synthesis of Tetrahydrofurans

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.

Key words

tetrahydrofurans - silylmethyl allylic silanes - annulation reaction - rearangements

References and Notes

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