A study of the friedel-crafts acylation of 1-benzenesulfonyl-1<i>H</i>-pyrrole in the preparation of 3-aroylpyrroles
作者:Ioannis Nicolaou、Vassilis J. Demopoulos
DOI:10.1002/jhet.5570350619
日期:1998.11
In this work, we studied the aluminum chloride catalyzed reaction of 1-benzenesulfonyl-1H-pyrrole with a series of eleven aroyl chlorides. The products formed were not isolated, but hydrolyzed to the target 3-aroylpyrroles in overall yields, usually, higher than 50%. However, in the cases with the π electron rich 1-phenyl-1H-pyrrole-3-carbonyl chloride and 1-methyl-1H-indole-3-carbonyl chloride significant
在这项工作中,我们研究了氯化铝催化的1-苯磺酰基-1 H-吡咯与一系列11种芳酰氯的反应。形成的产物不是分离的,而是水解成目标3-芳基吡咯的总产率,通常高于50%。但是,在富含π电子的1-苯基-1 H-吡咯-3-羰基氯和1-甲基-1 H-吲哚-3-羰基氯的情况下,发生了显着的C-2取代,导致分离出相应的1-苯磺酰基-2-芳酰基吡咯作为主要或唯一产品。从1-三异丙基硅烷基-1 H-吡咯开始合成所需的C-3异构体。