One-Pot Oxidation and Bromination of 3,4-Diaryl-2,5-dihydrothiophenes Using Br<sub>2</sub>: Synthesis and Application of 3,4-Diaryl-2,5-dibromothiophenes
作者:Yizhe Dang、Yi Chen
DOI:10.1021/jo071172i
日期:2007.8.31
(1b−5b) was synthesized by a one-pot reaction of 3,4-diaryl-2,5-dihydrothiophenes with Br2 reagent in excellent yield (83−92%). It was found that Br2 performed a double function (oxidation and bromination) during the conversion of 3,4-diaryl-2,5-dihydrothiophenes to 3,4-diaryl-2,5-dibromothiophenes. The application of 3,4-diaryl-2,5-dibromothiophenes used as building blocks was also investigated. Employing
通过3,4-二芳基-2,5-二氢噻吩与Br 2试剂的一锅反应以优异的收率(83-92 )合成了一类3,4-二芳基-2,5-二溴噻吩(1b - 5b)%)。发现Br 2在3,4-二芳基-2,5-二氢噻吩转化为3,4-二芳基-2,5-二溴噻吩的过程中具有双重功能(氧化和溴化)。还研究了3,4-二芳基-2,5-二溴噻吩作为建筑材料的应用。以3,4-二苯基-2,5-二溴噻吩(1b)为模板,通过Suzuki偶联反应制备了2,3,4,5-四芳基噻吩类。这为制备2,3,4,5-四芳基噻吩提供了一种新的简单方法。