A Domino Aza-Piancatelli Rearrangement/Intramolecular Diels–Alder Reaction: Stereoselective Synthesis of Octahydro-1<i>H</i>-cyclopenta[<i>cd</i>]isoindole
作者:Shaik Gouse、Narra Rajashekar Reddy、Sundarababu Baskaran
DOI:10.1021/acs.orglett.9b01267
日期:2019.5.17
an efficient one-pot method for the construction of an angularly fused 5–6–5 aza-tricyclic framework has been developed in a highly stereoselective manner. This domino reaction is a novel combination of aza-Piancatelli rearrangement and intramolecular Diels–Alder reaction, which readily furnishes hexahydro-2a,5-epoxy-cyclopenta[cd]isoindole adducts, bearing six contiguous stereogenic centers in very
首次以高度立体选择性的方式开发了一种有效的单锅法,用于构建有角度融合的5-6-5氮杂三环骨架。该多米诺反应是氮杂-Piancatelli重排和分子内Diels-Alder反应的新颖组合,可轻松提供六氢-2a,5-环氧-环戊[ cd ]异吲哚加合物,带有六个连续的立体中心,且收率很高。BBr 3介导的氧杂桥联加合物的裂解导致八氢-1 H-环戊[ cd ]异吲哚的形成,这是gracilamine生物碱的氮杂-三环BCE核心。