Formation and Reaction of Acyl Substituted Nitrile Ylide through the Rh2 (OAc) 4-Catalyzed Reaction of. ALPHA.-Diazocarbonyl Compounds with Benzonitrile.
The rhodium (II) acetate-catalyzed reaction of α-diazocarbonyl compounds with benzonitrile and dimethyl acetylenedicarboxylate gave oxazoles and pyrrole-3, 4-dicarboxylates through the 1, 5-cyclization and 1, 3-dipolar cycloaddition of the acyl substituted nitrile ylide intermediates generated by the reaction of ketocarbenoids with benzonitrile.
