A Remarkable Accelerating Effect of Ag-Salt on Intramolecular Cyclization of <i>o</i>-(1-Alkynyl)benzenesulfonamides
作者:Deepak Kumar Barange、T. C. Nishad、N. Kumara Swamy、Venkanna Bandameedi、Dinesh Kumar、Bukkapattanam R. Sreekanth、K. Vyas、Manojit Pal
DOI:10.1021/jo701470h
日期:2007.10.1
Herein, we report transition metal-catalyzed intramolecular cyclization of o-(1-alkynyl)benzenesulfonamides to afford 3-substituted benzothiazines regioselectively via a C-N bond forming reaction and Cu-catalyzed sequential C-N and C-C bond formation leading to the corresponding 3,4-disubstituted derivatives.