Document Type

Article

Publication Date

2001

Publication Title

Synlett

Issue

2

First Page

0243

Last Page

0247

Keywords

alkyne complexes, cobalt, ring closure, Lewis acids, nucleophiles

Abstract

Butyne-1,4-diether hexacarbonyldicobalt complexes 1 undergo Lewis acid mediated 4+3 cycloadditions with allylsilanes, incorporating halide from the Lewis acid to give halocycloheptynes 3, 6, 7. A phenyl group may be incorporated in place of the halogen (to give 8) by use of benzene as solvent and with B(C6F5)(3) as the Lewis acid; chlorobenzene and toluene also participate in the process.

Comments

The article available for download is the Accepted Version. The definitive version is published in Synlett and is available here. Copyright (2012) Georg Thieme Verlag KG.

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