Isopropanol and potassium tert-butoxide promoted intramolecular direct sp2 C–H functionalization: an expedient synthesis of 1,2,3-triazole annulated chromens and quinolones

Abstract A series of 1,2,3-triazole annulated chromen and quinolone derivatives have been synthesized by means of direct sp 2 C–H functionalization in the presence of iso -propanol and potassium tert -butoxide. The reaction proceeds through homolytic aromatic substitution (HAS). This efficient as well as simple C–H functionalization methodology offers a straightforward route to 1,2,3-triazole annulated oxygen and nitrogen heterocycles.