Ruthenium-Catalyzed Transformation of Aryl and Alkenyl Triflates to Halides

摘要

Aryl triflates were transformed to aryl bromides/iodides simply by treating them with LiBr/Nal and [Cp~*Ru(MeCN)_3]OTf. The ruthenium complex also catalyzed the transformation of alkenyl sulfonates and phosphates to alkenyl halides under mild conditions. Aryl and alkenyl triflates undergo oxidative addition to a ruthenium(Ⅱ) complex to form η~1-arylruthenium and 1-ruthenacyclopropene intermediates, respectively, which are transformed to the corresponding halides.