Efficient One-Pot Synthesis of Highly Substituted Pyridin-2(1H)-ones via the Vilsmeier-Haack Reaction of 1 -Acetyl,1 -Carbamoyl Cyclopropanes

摘要

A facile and efficient one-pot synthesis of highly substituted pyridin-2(1 H)-ones is developed via the Vilsmeier-Haack reaction of readily available 1-acetyl,1-carbamoyl cyclopropanes, and a mechanism involving sequential ring-opening, haloformylation, and intramolecular nucleophilic cyclization reactions is proposed.