作者:Vincent Barbier、Jérôme Marrot、François Couty、Olivier R. P. David
DOI:10.1002/ejoc.201501342
日期:2016.1
Activation of β-lactams can be achieved by simple Lewis-base catalysis to trigger an unprecedented reaction based on the formal dipolar behaviour of a strained amide bond. A new synthetic route for 1,3-oxazinan-6-ones is presented by reaction of β-lactams with ethylglyoxylate, which after methodological optimizations identified 4-pyrrolidinopyridine as the catalyst of choice in aprotic polar solvents
β-内酰胺的活化可以通过简单的路易斯碱催化来实现,以基于张力酰胺键的形式偶极行为触发前所未有的反应。β-内酰胺类与乙醛酸乙酯反应,提出了一种新的 1,3-恶嗪喃-6-酮合成路线,经过方法优化后确定 4-吡咯烷基吡啶为非质子极性溶剂中的首选催化剂。还根据为这种转变确定的内在局限性讨论了机械细节。