A cascade indazolone-directed Ir(<scp>iii</scp>)- and Rh(<scp>iii</scp>)-catalyzed C(sp²)–H functionalization/[4 + 2] annulation of 1-arylindazolones with sulfoxonium ylides to access chemically divergent 8<i>H</i>-indazolo [1,2-<i>a</i>]cinnolines

Abstract

An indazolone-directed chemoselective synthesis of 8 H -indazolo [1,2- a ]cinnolines has been realized via a cascade Cp*Ir( iii )- and Cp*Rh( iii )-catalyzed C–H activation/cyclization reaction of 1-arylindazolones with sulfoxonium ylides.