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

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.