Synthetic connections to the aromatic directed metalation reaction. Functionalized aryl boronic acids by ipso borodesilylation. General syntheses of unsymmetrical biphenyls and m-terphenyls
作者:M.J. Sharp、W. Cheng、V. Snieckus
DOI:10.1016/s0040-4039(00)95599-0
日期:——
Aryl boronic acids 2a-d and 4a-d obtained by metalation-B(OMe)3 or metalation silylation-ipso borodesilylation sequences, participate in efficient Pd°-catalyzed cross coupling reactions with aryl bromides to give unsymmetrical biphenyls 3a-d and -terphenyls 5a-d respectively.