Synthesis of Carbazoles and Carbazole-Containing Heterocycles via Rhodium-Catalyzed Tandem Carbonylative Benzannulations
作者:Wangze Song、Xiaoxun Li、Ka Yang、Xian-liang Zhao、Daniel A. Glazier、Bao-min Xi、Weiping Tang
DOI:10.1021/acs.joc.6b00212
日期:2016.4.1
tri-, tetra-, and pentacyclic heterocycles from different types of aryl propargylic alcohols. These tandem reactions provide efficient access to highly substituted carbazoles, furocarbazoles, pyrrolocarbazoles, thiophenocarbazoles, and indolocarbazoles. While tricyclic heterocycles could be derived from vinyl aryl propargylic alcohols, tetra- and pentacyclic heterocycles were synthesized from diaryl
多环芳族化合物是药物和其他材料的重要成分。我们已经开发了一系列Rh催化的串联羰基苯环用于从不同类型的芳基炔丙醇合成三环,四环和五环杂环。这些串联反应提供了高效取代高度取代的咔唑,呋喃咔唑,吡咯并咔唑,噻吩并咔唑和吲哚并咔唑的途径。虽然三环杂环可以衍生自乙烯基芳基炔丙醇,但四环和五环杂环是由二芳基炔丙醇合成的。串联羰基苯环化反应是由π-酸性铑(I)催化剂介导的向炔烃的亲核加成生成的,从而生成关键的金属-卡宾中间体,然后被一氧化碳捕获,形成乙烯酮,用于6π电环化。总体而言,在所有这些串联的羰基苯并环化反应中均形成三个键和两个环。