This communication describes extremely simple one-step synthesis of α,α′-dialkyloligothiophenes by the lithiation/alkylation of the corresponding commercially available oligothiophenes. Use of t-BuOK to enhance the reactivity of lithiated oligothiophene species towards alkyl halides is crucially important.
Symmetrical and Nonsymmetrical Liquid Crystalline Oligothiophenes: Convenient Synthesis and Transition-Temperature Engineering
作者:Julie Leroy、Nicolas Boucher、Sergey Sergeyev、Michele Sferrazza、Yves Henri Geerts
DOI:10.1002/ejoc.200600850
日期:2007.3
the aromatic core with two identical branched alkyl chains and (ii) desymmetrization of the molecule with two alkyl substituents of different length or structure. Key steps in the synthesis of symmetrical and nonsymmetrical terthiophenes and quaterthiophenes involve Suzuki coupling and carbanion alkylation. A well-adjusted balance between the π–π stacking of the aromatic core and the disorder caused