Mechanistic Insight Enables Practical, Scalable, Room Temperature Chan–Lam <i>N</i>-Arylation of <i>N</i>-Aryl Sulfonamides
作者:Julien C. Vantourout、Ling Li、Enrique Bendito-Moll、Sonia Chabbra、Kenneth Arrington、Bela E. Bode、Albert Isidro-Llobet、John A. Kowalski、Mark G. Nilson、Katherine M. P. Wheelhouse、John L. Woodard、Shiping Xie、David C. Leitch、Allan J. B. Watson
DOI:10.1021/acscatal.8b03238
日期:2018.10.5
Sulfonamides are profoundly important in pharmaceutical design. C-N cross-coupling of sulfonamides is an effective method for fragment coupling and structure-activity relationship (SAR) mining. However, cross-coupling of the important N-arylsulfonamide pharmacophore has been notably unsuccessful. Here, we present a solution to this problem via oxidative Cu catalysis (Chan-Lam cross-coupling). Mechanistic insight has allowed the discovery and refinement of an effective cationic Cu-catalyst to facilitate the practical and scalable Chan-Lam N-arylation of primary and secondary N-arylsulfonamides at room temperature. We also demonstrate utility in the large scale synthesis of a key intermediate to a clinical hepatitis C virus treatment.