Borylation of Arenes with Bis(hexylene glycolato)diboron
作者:John Hartwig、Carl Liskey
DOI:10.1055/s-0033-1338863
日期:——
A series of diolate-substituted diboron compounds were investigated as reagents for iridium-catalyzed C-H borylations of arenes. These studies showed that commercially available bis(hexylene glycolato)diboron reacts with arenes in the presence of the catalyst generated from [Ir(COD)OMe](2) and di-tert-butylbipyridine. This reagent is prepared from a less expensive diol than the more commonly used bis(pinacolato)diboron reagent.
Highly Selective Trifluoromethylation of 1,3-Disubstituted Arenes through Iridium-Catalyzed Arene Borylation
作者:Tianfei Liu、Xinxin Shao、Yaming Wu、Qilong Shen
DOI:10.1002/anie.201106673
日期:2012.1.9
The old one two: A sequential iridium‐catalyzedborylation and copper‐catalyzed trifluoromethylation of arenes is described (see scheme; Pin=pinacol). The reaction is conducted under mild reaction conditions and tolerates a variety of functional groups. The advantages of this tandem procedure are demonstrated by the late‐stage trifluoromethylation of a number of biologically active molecules.