A simple synthesis of 2,3-diketo amides from 3-keto amides
摘要:
The conversion of 3-keto amides to 2-(nosyloxy)-3-keto amides 4a-g followed by DBU-promoted, reductive elimination of p-nitrobenzenesulfinic acid provides a short, simple method for the preparation of 2,3-dioxo amides (tricarbonyl amides) 5a-f in high yields.
报道了一种从环烷酮直接制备N-取代内酰胺的新方法。使N-(对硝基苯磺酰氧基)甲胺(CH 3 NH-OSO 2 C 6 H 4 NO 2)与一系列环烷酮反应,得到良好收率的N-甲基内酰胺。加成-重排途径解释了扩环的内酰胺产物。一系列原位生成N-烷基-N-芳基磺氧基胺,并与环丁酮反应以高收率得到N-烷基吡咯烷酮。