The structure of the quinolinone obtained from thermal cyclization of ketene dithioacetal has been revised by X-ray crystallographic analysis as 4-quinolinone instead of the previously reported 2-quinolinone. In the course of study on the mechanistic feature of the thermal cyclization, highly substituted β-lactams were obtained by alkylating β-lactam anion with MEMCl, MOMCl, or MeI in the presence of NaH.
通过X射线晶体学分析,从酮烯二
硫缩醛热环化得到的
喹诺酮结构已修正为4-
喹诺酮,而非先前报道的2-
喹诺酮。在进行热环化机理特征的研究过程中,通过使用M
EMCl、MOMCl或MeI在NaH存在下对β-内酰胺阴离子进行烷基化,获得了高度取代的β-内酰胺。