PREPARATION OF 1,4-BIS(2-ETHYNYL-3-THIENYL)BENZENES AS VERSATILE SPACERS FOR CONNECTION OF HETEROCYCLES

摘要

Iodination of 1,4-di(3-thienyl)benzene gave 1,4-bis(2-iodo-3-thienyl)-benzene,which was converted to 1,4-bis(2-ethynyl-3-thienyl)benzene.Novel 1,4-bis[2-(pyridylethynyl)-3-thienyl]benzene ligands containing the bis(ethynylthienyl)benzene spacer were prepared by Sonogashira reaction.Advantage of the spacer was demonstrated by introducing functionalized alkyl groups to the 5-position of the thiophene ring of 1,4-bis[2-(trialkylsilylethynyl)-3-thienyl]benzene.