Highly diastereoselective Staudinger reaction on 5,6-dihydropyrazin-2-(1H)-ones. Synthesis of enantiopure fused oxopiperazino-β-lactams
作者:Alma Viso、Roberto Fernández de la Pradilla、Aida Flores
DOI:10.1016/j.tetlet.2006.10.044
日期:2006.12
The highlydiastereoselectivesynthesis of fused oxopiperazino-β-lactams 2 by Staudingerreaction between functionalized ketenes and 5,6-dihydropyrazin-2(1H)-ones 1 has been carried out. Further cleavage of the β-lactam ring produced 2-oxopiperazine-3-acetic acid derivatives 7 with no epimerization and in good yields.