Influence of magnesium bromide on the regioselectivity of the cycloaddition of ynamines with cyclenones: difference in reactivity between cyclohexenones and cyclopentenones.

J. Ficini, A. Krief, A. Guingant, D. Desmaele

Research output: Contribution to journalArticle

Abstract

The cycloaddition of ynamines uith cyclohexenones occurs in the presence of magnesium bromide at the carbonyl but proceeds by attack on the carbon-carbon double bond without catalyst whereas, in contrast, with cyclopentenones, the reaction takes place at the carbon-carbon double bond with or without magnesium bromide.
Original languageEnglish
Pages (from-to)725-728
Number of pages4
JournalTetrahedron Letters
Volume22
Issue number8
Publication statusPublished - 1 Jan 1981

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