Molecular iodine-mediated formal [2+1+1+1] cycloaddition access to pyrrolo[2,1-<i>a</i>]isoquinolines with DMSO as the methylene source
作者:Kailu Zheng、Shiyi Zhuang、Wenming Shu、Yandong Wu、Chuluo Yang、Anxin Wu
DOI:10.1039/c8cc06908e
日期:——
A molecular iodine-mediated formal [2+1+1+1] cycloaddition for the efficient synthesis of pyrrolo[2,1-a]isoquinolines from acetophenones, 1,2,3,4-tetrahydroisoquinoline (THIQ) and DMSO has been developed. Mechanistic studies revealed that DMSO served as the methylene source, and this novel protocol involves intermolecular cycloaddition of two in situ generated intermediates that enable efficient formation
分子碘介导的正式[2 + 1 + 1 + 1]环加成反应可从苯乙酮,1,2,3,4-四氢异喹啉(THIQ)和DMSO有效合成吡咯并[ 2,1- a ]异喹啉。机理研究表明,DMSO是亚甲基的来源,该新颖的方法涉及分子间环加成两个原位生成的中间体,这些中间体能够通过多个连续的C–H功能化有效地形成一个C–N键和三个C–C键。