A new furoketenimine intermediate from the coupling of ene-yne-ketones and o-alkenyl arylisocyanides, which enables the efficient synthesis of a wide range of tetracyclic and pentacyclic furan-fused heterocycles in a one-pot domino process under catalyst-free conditions, is disclosed. Based on the control experiments, a cascade of 1,6-addition, cyclization, intramolecular Diels–Alder reaction, and
通过烯-炔-酮和邻烯基芳基
异氰酸酯的偶合反应制得的一种新的
呋喃丁
亚胺中间体,该中间体能够在无催化剂条件下,通过一锅多米诺法高效合成各种四环和五环
呋喃稠合的杂环。披露。在控制实验的基础上,提出了1,6-加成,环化,分子内Diels-Alder反应和氧化芳构化的级联反应。