Abstract
AbstractAn additive‐free, mild, and regioselective C(1)−H nitration of imidazo[1,5‐a]pyridine derivatives was developed. This protocol features the use of easily handled, commercially available, and nontoxic Fe(NO3)3 ⋅ 9H2O both as a nitration source and as a promoter, exhibits good functional group compatibility, and generates the desired nitrated products in acceptable to excellent yields. Mechanistic studies proposed that the nitration reaction may involve a radical C−H functionalization process.
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