Palladium-catalyzed coupling reactions towards the synthesis of well-defined thiophene-oligomers
作者:Jwanro Hassan、Christel Gozzi、Emmanuelle Schulz、Marc Lemaire
DOI:10.1016/s0022-328x(03)00626-0
日期:2003.12
Heck- and Ullmann-type palladium-catalyzed reactions were used in order to perform the synthesis of 3',4"-dioctyl-2,2',5'2",5",2"'-tetrathienyl. The desired oligothiophene was synthesized in five steps with a total yield of 38% by a Heck-type reaction of bromo-derivatives and a yield of 45% by an Ullmann-type reaction of iodo-precursors. (C) 2003 Elsevier B.V. All rights reserved.