triethylamine in methanol 18 h; Heating;

1: 1) NaH / 1) benzene, reflux, 2 h, 2a) RT, overnight, 2b) benzene, reflux, 6 h 2: 80 percent / phenyltrimethylammonium perbromide / tetrahydrofuran / 24 h 3: 53.4 percent / triethylamine / methanol / 18 h / Heating View Scheme