Copper(<scp>ii</scp>)-catalyzed Chan–Lam cross-coupling: chemoselective N-arylation of aminophenols
作者:A. Siva Reddy、K. Ranjith Reddy、D. Nageswar Rao、Chaitanya K. Jaladanki、Prasad V. Bharatam、Patrick Y. S. Lam、Parthasarathi Das
DOI:10.1039/c6ob02444k
日期:——
Copper(II)-catalyzed boronic acid promoted chemoselective N-arylation of unprotected aminophenols has been developed. Selective N-arylation of 3-aminophenol is achieved with a Cu(OAc)2/AgOAc combination in MeOH at rt, whereas the chemoselective N-arylated products of 4-aminophenol can be obtained with a Cu(OAc)2/Cs2CO3 system and benzoic acid as an additive. These ligand-free conditions and “open-flask”