Mo(CO)₆- and [Rh(CO)₂Cl]₂-Catalyzed Allenic Cyclocarbonylation Reactions of Alkynones:  Efficient Access to Bicyclic Dienediones

Abstract

Allenyl alkynones are efficiently transformed into fused bicyclic dienediones via cyclocarbonylation reaction conditions. Mo(CO)6/DMSO reaction conditions result in the formation of a bicyclo[3.3.0]octenone ring system, and the [Rh(CO)2Cl]2-catalyzed reaction affords bicyclo[4.3.0]nonenone and bicyclo[5.3.0]decenone scaffolds.