Abstract
AbstractIt has been established that a cationic rhodium(I)/H8‐binap or binap complex catalyzes two different modes of cyclization of γ‐alkynyl aldehydes with carboxylic acid anhydrides to give cyclic aldehyde gem‐dicarboxylates and cyclic alkenyl esters through cleavage of the carboxylic acid anhydride C–O bond. The reaction of a terminal γ‐alkynyl aldehyde with diethyl pyrocarbonate afforded a cyclic allylic carbonate with a high ee value.
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