Brønsted Acid Catalyzed Cyclization of Inert N-Substituted Pyrroles to Benzo[f]pyrrolo[1,2-a][1,4]diazepines
作者:Jinlong Zhang、Gaoxi Jiang、Zeng Gao、Jinlong Qian、Huameng Yang
DOI:10.1055/a-1468-5725
日期:2021.6
construction of a series of important benzo[f]pyrrolo[1,2-a][1,4]azepines by using Brønsted acid catalysts. Upon catalysis by TsOH, the intramolecular dehydroxylation/ring closure of 3-hydroxy-2-[2-(1H-pyrrol-1-yl)benzyl]isoindolin-1-ones provided various racemic benzo[f]pyrrolo[1,2-a][1,4]azepines in high yields. Furthermore, enantioenriched benzo[f]pyrrolo[1,2-a][1,4]azepines were also obtained by chiral
已经开发出两种分别涉及分子内和分子间环化的方法,以通过使用布朗斯台德酸催化剂直接和实际构建一系列重要的苯并[f]吡咯并[1,2-a] [1,4]氮杂。在TsOH催化下,3-羟基-2- [2-(2-(1H-吡咯-1-基)苄基]异吲哚啉-1-酮的分子内脱羟基/环闭合提供了各种外消旋苯并[f]吡咯并[1,2- a] [1,4]氮杂a类高产。此外,还通过手性磷酸催化将[2-(1H-吡咯-1-基)苯基]甲胺分子间加成而获得了对映体富集的苯并[f]吡咯并[1,2-a] [1,4]氮杂。甲酰苯甲酸酯在温和的条件下。