Metal-free photoinduced alkylative [3 + 2] annulation of terminal alkynes with N-alkyl isoquinolin-2-iums by catalytic isoquinoline-based electron donor–acceptor complex

Catalytic isoquinoline-based EDA complex photoreduced alkylative [3 + 2] annulation of alkynes with N -alkyl isoquinolin-2-iums toward pyrrolo[2,1- a ]isoquinolines is depicted.