New cyclic zwitterionic building blocks for the synthesis of piperidine-2,4-dione and pyridine-2-one compounds
作者:Angel Palillero、Joel L. Terán、Dino Gnecco、Jorge R. Juárez、María L. Orea、Alejandro Castro
DOI:10.1016/j.tetlet.2009.02.143
日期:2009.7
we describe the synthesis of new chiral cyclic zwitterionic pyridin-2-one compounds 5a,b via an intramolecular ring-closure reaction of a stabilize amide sulfurylide 4a,b derived from (R)-(−)-2-phenylglycinol and (R)-(+)-phenylethylamine in a high yield. In addition, we proved the utility of 5a,b to produce piperidine-2,4-dione 6a,b and pyridine-2-one 7a,b depending on the reaction conditions.