Abstract
A palladium-catalyzed homo cross-dehydrogenative coupling (CDC) of 2-arylpyridines via C–H activation is described. This reaction employs I2 as the sole oxidant without any other additives, which complements the hypervalent iodine chemistry, such as of phenyliodonium diacetate (PIDA) or IOAc, in C–H activation research field. A tentative mechanism involving a Pd(II)–Pd(IV) catalytic cycle is proposed to rationalize this homo CDC reaction.
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