Subjection of N-methyl 6- and 7-azaindole N-oxides to a Pd(OAc)2/DavePhos catalyst system enables regioselective direct arylation of the azine ring. Following deoxygenation, 7-azaindole substrates undergo an additional regioselective azole direct arylation event in good yield.
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Huestis et al. (2009) studied this question.
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