Palladium-Catalyzed Monoselective Halogenation of CH Bonds: Efficient Access to Halogenated Arylpyrimidines using Calcium Halides
作者:Bingrui Song、Xiaojian Zheng、Jun Mo、Bin Xu
DOI:10.1002/adsc.200900778
日期:2010.2.15
A wide variety of ortho-halogenated arylpyrimidines were prepared with high monoselectivity and functional-group tolerance by usingcalciumhalides as crucial halogenating agents and cupric trifluoroacetate as oxidant in the presence of air.
Sodium Halides as Halogenating Reagents: Rhodium(III)-Catalyzed Versatile and Practical Halogenation of Aryl Compounds
作者:Panpan Zhang、Liang Hong、Guofeng Li、Rui Wang
DOI:10.1002/adsc.201400590
日期:2015.2.9
AbstractWe report a concise, versatile and practical method for the ortho‐chlorination, ortho‐bromination and ortho‐iodination of aryl compounds. The significant advantage of this transformation is the creation of the carbon‐halogen bond by use of readily available and cheap halide salts as formal nucleophilic halogenating reagents under mild reaction conditions.magnified image