Meta- and Para-Difunctionalization of Arenes via a Sulfoxide-Magnesium Exchange Reaction.

[摘要]：The aryl sulfoxide moiety (ArSO) allows an expedient two-step meta-, para-difunctionalization of readily available diaryl sulfoxides. In the first step, the sulfoxide plays the role of a directing metalation group. In the second step, triggered by i-PrMgCl譒iCl, it becomes a leaving group and undergoes a regioselective sulfoxide-magnesium exchange.

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