Pd-catalyzed regioselective rollover dual C–H annulation cascade: facile approach to phenanthrene derivatives

Abstract

Annulations of unsaturated systems through C-H activation represent a powerful tool for multi cyclic scaffolds. Having co-ordinating centers in both annulation partners, a dual coordination strategy, would afford remarkable selectivities...

Transition metal-free and temperature dependent one-pot access to phenanthrene-fused heterocycles via a 1,3-dipolar cycloaddition pathway

“…There is a reasonable number of reports on the individual synthesis of phenanthrenes [16][17][18][19][20][21] and pyrazoles. [22][23][24][25][26] For instance, the research group of Wang demonstrated the efficient formation of phenanthrols starting from diphenyl dicarbonyls and tosyl hydrazide under basic conditions (Scheme 1a).…”