Design of hybrid heterocyclic systems with a furoxanylpyridine core via tandem hetero-Diels–Alder/retro-Diels–Alder reactions of (1,2,4-triazin-3-yl)furoxans
作者:Leonid L. Fershtat、Alexander A. Larin、Margarita A. Epishina、Igor V. Ovchinnikov、Alexander S. Kulikov、Ivan V. Ananyev、Nina N. Makhova
DOI:10.1039/c6ra05110c
日期:——
Two convenient, facile, regioselective and highly effective one-pot protocols for the synthesis of previously unknown hybrid heterocyclic systems with the furoxanylpyridine core based on the tandem inverse-electron-demand hetero-Diels–Alder/retro-Diels–Alder reactions of the tailor-made (1,2,4-triazin-3-yl)furoxans with 1-(pyrrolidino)cyclohexene and norbornadiene have been developed. The methods comprise
两种方便,简便,区域选择性和高效的一锅操作方案,用于根据裁缝的串联反电子需求异Diels-Alder / Retro-Diels-Alder反应,合成具有呋喃唑啉核心的先前未知的杂化杂环系统已经开发了具有1-(吡咯烷基)环己烯和降冰片二烯的(1,2,4-三嗪-3-基)呋喃酮。该方法包括将烯胺或降冰片二烯[4 + 2]环加成到(1,2,4-三嗪-3-基)呋喃酮的1,2,4-三嗪环上,然后一锅转化形成的中间体,并且可以通过一个C–C键在一个分子中将呋喃喃和吡啶(四氢异喹啉,茚并吡啶,三联吡啶)环相结合,形成一系列广泛的多杂环合簇,收率好至极好。