摘要:
This paper describes a general approach for the synthesis of conjugated 6,6'-disubstituted-3,3'-bipyridine chromophores. As preliminary results, 6-(4-hexyl-2-thienylvinylene)-5-methyl-3-bromopyridine, 6-(4-ethanol-2-thienylvinylene)-5-methyl-3-bromopyridine. and the corresponding 3-pyridinylboronic esters have been prepared. Coupled by Suzuki reaction, they gave the conjugated chromophores (I) and (II) in high yields and multigram scales. (C) 2003 Elsevier Ltd. All rights reserved.