Toward a novel approach to bis-β-lactam synthesis using Vilsmeier reagent as an efficient entity via Staudinger cycloaddition reaction

One-Pot Sequence Synthesis of Azetidin-2-One Using Diethyl Chlorophosphate

A simple and convenient synthesis of 2-azetidinone derivatives from the reaction of a pre-mixture of amines and aldehydes with carboxylic acids in the presence of diethyl chlorophosphate by [2+2] cycloaddition reaction is described. Separation and purification of imines as intermediates were not required. The methodology is convenient and good to excellent yields of products were obtained with simple purification.