An efficient method for the reduction of aromatic azides to anilines via the Staudinger reaction using tri-n-butylphosphonium tetrafluoroborate with triethylamine in aqueous tetrahydrofuran solution is reported. The method enables the aromatic azido-selective reduction of 3-azido-5-(azidomethyl)benzene derivatives to efficiently afford anilines bearing an azidomethyl group.
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Meguro et al. (2017) studied this question.
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