Access to conjugated enynes via allenyl silver formation/cyclization/decarboxylation reaction catalyzed by silver carbonate(I)
Résumé
Herein, we develop a novel and straightforward access to cyclic conjugated enynes catalyzed by silver carbonate/DBU from readily available substrates with good yields. The reaction is easy to setup , broad in scope and can also be conducted in a onepot fashion from easily accessible substrates through a sequence Michael addition reaction/cyclization. Based on our previous works, the mechanism proposed would involve an allenyl silver intermediate and decarboxylation reaction.
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