Pd-Catalyzed Direct Arylation of Tautomerizable Heterocycles with Aryl Boronic Acids via C−OH Bond Activation Using Phosphonium Salts
作者:Fu-An Kang、Zhihua Sui、William V. Murray
DOI:10.1021/ja804804p
日期:2008.8.27
first direct arylation via C-OH bondactivation of tautomerizable heterocycles has been achieved using phosphonium salts, on the basis of a combination of the phosphonium coupling and Suzuki-Miyauracross-coupling conditions. Optimal reaction condition is obtained through screening of phosphonium salts, Pd catalysts, and bases. The direct arylation via C-OH bondactivation tolerates a variety of tautomerizable