Novel Rearrangement During the Reaction of Diethylmalonate with α-(5-Substituted 2-hydroxyphenyl)-N-phenyl Nitrones
摘要:
The hydroxyl group at the ortho position of the -aryl ring of -(2-hydroxyaryl)-N-aryl nitrones altered the expected course of the reaction between differently substituted -(2-hydroxyaryl)-N-aryl nitrones and diethylmalonate, leading to the formation of an enamine involving an interesting rearrangement under microwave irradiation. The enamines have been characterized by NMR and x-ray analyses, and a reasonable mechanism has been put forwarded to explain the rearrangement.