Unprecedented side reactions in Stille coupling: desired ones for Stille polycondensation†
Abstract
Two types of unprecedented side reactions were identified in the Stille coupling reaction, including the direct C–H stannylation of the α-hydrogen of thiophene and the stannylation of arylbromides with trialkylstannane bromide. These results reveal the major source of enhancements for Stille polycondensation efficiency.