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A method for visible-light-induced synthesis of polyheteroaromatics from 2-heteroaryl-substituted anilines and heteroarylalkynes was developed. The process, which uses fac-Ir(ppy)3 as the photocatalyst and (t)BuONO as the diazotization reagent, is highly regioselective.
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Chatterjee et al. (2016) studied this question.
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