A range of halogenated methylthiophenes undergo dehalogenative condensation upon FVP over magnesium or calcium to give products including benzodithiophenes; in some cases this involves a novel rearrangement by equilibration of alkenylthienyl radicals via thiophene-fused cyclopropylmethyl intermediates.
R. A. Aitken and A. O. Oyewale, RSC Adv., 2015, 5, 19379 DOI: 10.1039/C4RA15004J
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