A concise stereoselective approach to β-Alkylaspartates from β-Lactams via [2 + 2] cycloaddition reaction of ketenes to glyoxylic ester-derived imines.
作者:Claudio Palomo、Jesus M. Aizpurua、Jesus M. Ontoria、Miren Iturburu
DOI:10.1016/s0040-4039(00)61295-9
日期:1992.8
syn beta-Alkyl aspartates were obtained with high stereoselectivities from cis 4-alkoxycarbonyl-beta-lactams prepared via [2 + 2] cycloaddition reaction of monoalkylketenes and glyoxalate derived imines.