A palladium-catalyzed synthesis of dibenzothiophenes from 2-biphenylthiols is described. This highly efficient reaction employs a simple PdCl2/DMSO catalytic system, in which PdCl2 is the sole metal catalyst and DMSO functions as an oxidant and solvent. This transformation has broad substrate scope and operational simplicity and proceeds in high yield. The synthetic utility was demonstrated by the
描述了由2-联
苯硫醇钯催化的
二苯并噻吩的合成。该高效反应采用简单的PdCl 2 /
DMSO催化系统,其中PdCl 2是唯一的
金属催化剂,而
DMSO充当氧化剂和溶剂。这种转化具有广泛的底物范围和操作简便性,并且产率高。螺旋二
萘并
噻吩3和著名的有机半导体DBTDT 4的合成很容易,证明了合成的实用性。重要的是,在这种催化体系下,观察到了高度紧张的三
硫杂亚苏曼烯5,这是一种具有相当大的合成挑战性的巴克杯。