One-pot Synthesis of Benzo[<i>b</i>]thiophenes and Benzo[<i>b</i>]selenophenes from <i>o</i>-Halo-Substituted Ethynylbenzenes: Convenient Approach to Mono-, Bis-, and Tris-Chalcogenophene-Annulated Benzenes
作者:Tomoya Kashiki、Shoji Shinamura、Masahiro Kohara、Eigo Miyazaki、Kazuo Takimiya、Masaaki Ikeda、Hirokazu Kuwabara
DOI:10.1021/ol900809w
日期:2009.6.4
procedure for the synthesis of benzo[b]thiophenes and selenophenes from readily available o-halo-ethynylbenzene precursors is described. Regardless of the substituent on the acetylene terminus or the number of cyclization moieties on the precursors, various benzo[b]thiophenes and selenophenes, including not only the parent, alkyl-, and phenyl-substituted derivatives but also benzo[1,2-b:4,5-b′]dithiophenes
描述了一种方便的一锅法,用于从容易获得的邻卤代乙炔基苯前体合成苯并[ b ]噻吩和硒代苯。不论乙炔末端上的取代基或前体上的环化部分数量如何,各种苯并[ b ]噻吩和硒代苯不仅包括母体,烷基和苯基取代的衍生物,而且还包括苯并[1,2- b]可以高产率地制备: 4,5- b ′]二噻吩和二硒吩和苯并[1,2- b: 3,4- b ′:5,6 - b ′′]三噻吩和三硒吩。