Green light-mediated dual eosin Y/Pd II -catalyzed C(sp 2 )-H arylation of N-H unprotected 2-arylquinazolinones.

We report herein an eosin Y/Pd(II) dual catalytic approach for regio- and chemoselective C(sp 2 )-H monoarylation of N-H unprotected 2-phenyl quinazolinone derivatives under green light irradiation with no necessity for any base/additive/external oxidant. The free N-H moiety was post-modified for quinazolinone scaffold diversification and C-H annulation.