作者:Uwe Dahlmann、Richard Neidlein
DOI:10.1002/hlca.19960790318
日期:1996.5.8
syntheses of polyethynyl-substituted 2,2′-bithiophenes 2 and related 5,5′-dicarbaldehyde derivatives 1 are described. The treatment of easily available polybrominated 2,2′-bithiophenes 3 and 2,2′-bithiophene-5,5′-dicarbaldehydes 4 with phenyl or (trimethylsilyl)acetylene in the presence of PdII and CuI in (i-Pr)2NH yields substituted polyethynyl-2,2′-bithiophene compounds. The Me3Si protecting groups
描述了聚乙炔基取代的2,2'-联噻吩2和相关的5,5'-二甲醛衍生物1的合成。在(i-Pr)中存在Pd II和Cu I的情况下,用苯基或(三甲基甲硅烷基)乙炔处理容易获得的多溴化2,2'-联噻吩3和2,2'-联噻吩-5,5'-二甲醛4 2 NH生成取代的聚乙炔基-2,2'-联噻吩化合物。我3硅保护基可以在碱性条件下通过原甲硅烷基化除去,得到相应的末端乙炔基。这些聚乙炔基-联噻吩可能是合成具有有趣性质的大环的有趣前体。