Bromination, preparation 2-alkylthiophenes

Alkylthiophene preparation acylation, 401-407 bromination, 407,408/ electrophilic substitution of thiophenes,... 

Other types of functionalized poly(3-alkylthiophene)s can be prepared in order to obtain polymeric materials with different chemical, optical, and electronic properties and different solubilities. The organozinc route has been used to synthesize poly thiophenes bearing a phosphonic ester functionality or functional groups such as bromine, ester, alcohol, and acetal-protected aldehyde as terminal groups of C-3-substituents, as illustrated in Scheme 11 [76]. 

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