Acyl analogues of the ene reaction
Abstract
The unsaturated lactones, 3-morpholino-1H-2-benzopyran-1-one (6), 2,3-dihydro-5-morpholinofuran-2-one (19a), and its 3-(diphenylmethylene)- derivative (19b) add to numerous compounds containing electrondeficient multiple bonds to give products arising from ene reactions in which acyl groups are transferred.