A stable dimethyl(thiodimethyl)sulfonium tetrafluoroborate salt was employed for the electrophilic cyclization reaction of o-alkynyl thioanisoles for the synthesis of 2,3-disubstituted benzo[b]thiophenes. The reaction described herein works well with various substituted alkynes in excellent yields, and a valuable thiomethyl group was introduced with ease. The reaction utilizes moderate reaction conditions
一种稳定的二甲基(
硫代二甲基)锍四
氟硼酸盐用于邻炔基
硫代
苯甲醚的亲电环化反应,用于合成 2,3-二取代苯并[ b ]
噻吩。本文描述的反应以优异的收率与各种取代的
炔烃一起工作,并且很容易引入有价值的
硫甲基。该反应利用温和的反应条件和环境温度,同时耐受各种功能。为了阐明机理,证明了使用二甲基(
硫代二甲基)锍四
氟硼酸盐与二
苯乙炔的亲电加成反应。