Regio- and diastereoselective synthesis of trans-dihydrofuran-3-carboxamides by radical addition of 1,3-dicarbonyl compounds to acrylamides using manganese(III) acetate and determination of exact configuration by X-ray crystallography
In this study, we investigated the radicaladdition of 1,3-dicarbonyl compounds to acrylamide derivatives including phenyl, 2-thienyl and 5-methyl-2-furyl groups mediated by manganese(III) acetate. trans-3-Carboxamide-dihydrofurans were obtained in modarate to good yields, as well as regioand diastereoselectievly. Structural analyses of these compounds were made by NMR techniques such as HMBC and NOSY