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A novel nonmetallic oxidative coupling of alkylthiophene derivatives leading to the corresponding 2,2'-bithiophene derivatives using a combination of a hypervalent iodine(III) reagent, phenyliodine bis(trifluoroacetate) (PIFA), and BF3.Et2O was developed.
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Tohma et al. (2003) studied this question.
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