3,4-Disubstituted-1-arylazetidin-2-ones can be prepared in an enantiospecific manner by the annelation of Schiff bases from optically active glyceraldehyde acetonide and their stereochemistry determined from n.m.r. studies on lactones prepared from these β-lactams by molecular rearrangement.
3,4-二取代的-1-芳基氮杂
环丁烷-2-酮可以通过从光学活性
甘油醛
丙酮化物中席夫碱的脱核反应以对映体特异性的方式制备,其立体
化学由对这些β-内酰胺通过分子重排制得的内酯的NMR研究确定。