moderate to excellent yields. Mechanistically, the three-component reaction of 2, 3, and 4 leading to 5-alkoxyoxazoles was followed by a domino sequence involving Diels-Alder/retroDiels-Alder/oxidation reactions. In this one-pot process, five chemical bonds were created with concurrent formation of two heterocyclic rings. The reaction was performed under thermal conditions and no external reagent was
基于 α-(4-
硝基苯基)-α-
异氰基乙酸酯的新反应特性,开发了多取代
呋喃 [2,3-c]
喹啉 1 的一锅三组分合成方法。在室温下将醛 2、邻炔基
苯胺 3 和 α-(4-
硝基苯基)-α-
异氰基乙酸酯 4 在
甲醇中简单混合,然后加入
甲苯并加热回流,得到多取代的
呋喃 [2,3-c]
喹啉的产量中等至极好。从机制上讲,产生 5-烷氧基
恶唑的 2、3 和 4 的三组分反应之后是涉及 Diels-Alder/retroDiels-Alder/氧化反应的多米诺骨牌序列。在这个一锅法中,产生了五个
化学键,同时形成了两个杂环。