Metal-Free Triple Annulation of Ene–Yne–Ketones with Isocyanides: Domino Access to Furan-Fused Heterocycles via Furoketenimine
作者:Zhongyan Hu、Jinhuan Dong、Zhaoyang Li、Bo Yuan、Ruyue Wei、Xianxiu Xu
DOI:10.1021/acs.orglett.8b02870
日期:2018.11.2
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。