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Communication | Special issue | Vol 42, No. 2, 1996, pp.549-553
Published online, 1st January, 1970
DOI: 10.3987/COM-95-S96
Aprotic Chloride and Bromide-promoted Alkyne-Iminium Ion Cyclizations

Yoshinori Murata and Larry E. Overman

*Department of Chemistry, University of California, Irvine, California 92717-2025, U.S.A.

Abstract

The title cyclizations of 4-alkynyl- and 3-alkynyl-N-(methoxymethyl)-mines occur under milder conditions, and in the case of chloride in higher yields, than direct cyclizations of the corresponding secondary amine with formaldehyde and a halide salt.