Cu(I)[(CH3CN)4]BF4; 2,9-dimethyl-1,10-phenanthroline; iodine; 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene; methyloxirane in tetrahydrofuran T=20°C; 20 h; Flow reactorInert atmosphereIrradiation; Catalytic behavior;