Synthesis of enantiopure vicinal diaminoesters and ketopiperazines from N-sulfinylimidazolidines
作者:Alma Viso、Roberto Fernández de la Pradilla、Aída Flores、Ana García
DOI:10.1016/j.tet.2007.05.062
日期:2007.8
A short and efficientsynthesis of mono- and bicyclic ketopiperazines bearing methoxycarbonyl substituents is described. The route entails selective protection and solvolysis of N-sulfinylimidazolidines to provide vicinal diaminoesters with the nitrogen atoms suitably differentiated. Then, an N-acylation/cyclization protocol renders the ketopiperazines. In addition a diastereoselective route to an