Polymerization of 2,4-dibromo-3-hexyl-5-lithiated thiophene that is formed by deprotonation of 2,5-dibromo-3-hexylthiophene with LDA and following halogen dance takes place in the presence of a nickel(II) or palladium(II) catalyst to afford poly(3-bromo-4-hexylthiophen-2,5-diyl).
K. Shono, Y. Sumino, S. Tanaka, S. Tamba and A. Mori, Org. Chem. Front., 2014, 1, 678 DOI: 10.1039/C4QO00109E
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