Rh(i)-catalyzed CO gas-free cyclohydrocarbonylation of alkynes with formaldehyde to [small alpha],[small beta]-butenolides

Abstract

The rhodium(I)-catalyzed reaction of alkynes with formaldehyde proceeds via the double incorporation of a carbonyl moiety from formaldehyde, resulting in a CO gas-free cyclohydrocarbonylation leading to α,β-butenolides

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