학술논문
Murahashi Coupling Polymerization: Nickel(II)–N-Heterocyclic Carbene Complex-Catalyzed Polycondensation of Organolithium Species of (Hetero)arenes.
Document Type
Article
Source
Subject
*COUPLING reactions (Chemistry)
*POLYMERIZATION
*NICKEL catalysts
*CARBENES
*POLYCONDENSATION
*ORGANOLITHIUM compounds
*HETEROARENES
*
*
*
*
*
*
Language
ISSN
0002-7863
Abstract
Revisiting Murahashi coupling, we found that it effectively allows polymerization of lithiated (hetero)arenes by nickel(II)-catalyzed polycondensation. Deprotonative polymerization of 2-chloro-3-substituted thiophene with n-butyllithium gave head-to-tail-type poly(3-substituted thiophene). Poly(1,4-arylene)s were obtained by the reaction of the corresponding dibromides through lithium–bromine exchange. A lithiated thiophene derivative obtained via deprotonative halogen dance also underwent polymerization to afford a bromo-substituted polythiophene. [ABSTRACT FROM AUTHOR]