Gold-Catalyzed Cascade Cyclization−Oxidative Alkynylation of Allenoates
Organic Letters2010Vol. 12(21), pp. 4904–4907
Citations Over TimeTop 10% of 2010 papers
Abstract
A gold(I)-catalyzed cascade cyclization-oxidative cross-coupling process has been applied to prepare β-alkynyl-γ-butenolides directly from allenoates and various terminal alkynes. Following an initial gold-catalyzed C-O bond forming allenoate cyclization, a mechanism based on a Au(I)/Au(III) redox cycle has been proposed with Selectfluor acting as the external oxidant.
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