通过SnCl 4介导的一锅芳构化,环化和芳构化反应序列,从3-乙酰基/芳酰基-2-新戊酰氧基甲基吲哚开始开发了芳基和杂芳基环化的环[ b ]咔唑的直接合成方法。起始原料可通过Friedel-Crafts酰化,溴化和吡咯烷化反应从市售2-甲基吲哚轻松获得。值得注意的是,在本多米诺反应方案中,包括杂环系统在内的吸电子/给电子芳基单元具有良好的耐受性。此外,该方法可以扩展为通过2,5-双(2-新戊酰氧基甲基)吡咯的双环合成二苯并呋喃咔唑。
Synthesis of substituted carbazoles via electrocyclization of in situ generated enamines from 1-phenylsulfonyl-2/(3)-methyl-3/(2)-vinylindoles and DMF·DMA/DMA·DMA
摘要:
Interaction of 2/(3)-methyl-3/(2)-vinylindoles and DMF center dot DMA/DMA center dot DMA at 110 degrees C led to the in situ generation of enamines, which on concurrent electrocyclization followed by subsequent aromatization afforded substituted carbazoles. (C) 2009 Elsevier Ltd. All rights reserved.
Donor–acceptor-Type Polymers Based on Dithieno[2,3-<i>b</i>;7,6-<i>b</i>]carbazole Unit for Photovoltaic Applications
作者:Atsushi Kimoto、Yusuke Tajima
DOI:10.1021/ol300709u
日期:2012.5.4
Dithieno[2,3-b;7,6-b]carbazole (TCZT), a type of heteropentacene with nitrogen and sulfur atoms, was synthesized with a focus on the unique reactivity of carbazole via double intramolecular Friedel-Crafts acylation. A donor-acceptor-type polymer (PTCZTBT) was also synthesized, and Its physicochemical properties are reported.