Practical Organic Synthesis with Strained-Ring Molecules. Rhodium-Catalyzed Carbonylation of Cyclopropenyl Esters and Cyclopropenyl Ketones to α-Pyrones and of Vinyl Cyclopropenes to Phenols

Article abstract of DOI:10.1021/jo00388a064

Cyclopropenyl esters, prepared from alkynes and ethyl diazoacetate via rhodium acetate catalysis, can be converted into cyclopropenyl ketones, which in turn are converted into vinyl cyclopropenes.All three classes of cyclopropenes undergo rhodium-catalyze