Thienothiophenes. Part 2.1 Synthesis, metallation and bromine→lithium exchange reactions of thieno[3,2-b]thiophene and its polybromo derivatives
作者:Lance S. Fuller、Brian Iddon、Kevin A. Smith
DOI:10.1039/a701877k
日期:——
synthesis of thieno[3,2-b]thiophene [including a catalytic vapour-phase reaction (at 550 °C) between 2-(2-thienyl)ethanol and carbon disulfide], its 2-carboxylic acid and its 3,6-dibromo and 2,3,5,6-tetrabromo derivatives are reported. With 2 mol equiv. of butyllithium thieno[3,2-b]thiophene gives its 2,5-dilithiated derivative and its 3,6-dibromo derivative gives the 3,6-dilithiated compound. By quenching
噻吩并[3,2- b ]噻吩的大规模合成方法[包括2-(2-噻吩基)乙醇与二硫化碳之间的催化气相反应(在550°C下)]并报道了其3,6-二溴和2,3,5,6-四溴衍生物。与2摩尔当量 硫代丁基锂噻吩并[3,2- b ]噻吩的化合物得到其2,5-二锂化的衍生物,而其3,6-二溴衍生物得到了3,6-二锂化的化合物。通过用合适的亲电试剂淬灭,这些二锂化的化合物已经分别转化成各种2,5-或3,6-二取代的噻吩并[3,2- b ]噻吩。同样2,3,5,6- tetrabromothieno并[3,2- b ]噻吩已经被转换为2,5-二取代的3,6-二溴[3,2- b]噻吩。