Enantiomerically pure vinylketene acetals in the Diels-Alder reaction. Catalysis and facial selectivity

Article abstract of DOI:10.1016/S0040-4020(01)86459-0

A series of enantiomerically pure vinylketene acetals which function as diastereoselective dienes in the Diels-Alder reaction have been developed. Most selective are (4R, 5R)-4,5-diphenyl-2-(2-methyl-2-propenidene)-1,3-dioxolane (8) and (4R, 5R)-4,5-diphe