β-Lactam scaffold was fabricated regioselectively by a facile one-pot base-mediated synthesis. The reactions of bromoacetic acid 1, primary amines 2, isocyanides 3, and arylglyoxals 4 produced 2-aroyl-4-oxoazetidine-2-carboxamides 6 in good yields via a one-pot tandem Ugi condensation and intramolecular C-alkylation at room temperature in the presence of Cs2CO3.
β-内酰胺支架是通过容易的一锅碱基介导的合成进行区域选择性地制备的。溴乙酸1,伯胺2,异氰化物3和芳基乙二醛4的反应通过单锅串联Ugi缩合和室温下的分子内C-烷基化反应以高收率产生了2-芳酰基-4-氧杂氮杂环丁烷-2-羧酰胺6。 Cs 2 CO 3的存在。