in isopropyl alcohol Irradiation;

1: 1.) NaH, DMSO / 1.) r.t., 15 min; 2.) DMSO, r.t., 2.5 h 2: 2-methyl-propan-2-ol / 2.03 h / Irradiation 3: 2-methyl-propan-2-ol / 2 h / Irradiation View Scheme

1: 1.) NaH, DMSO / 1.) r.t., 15 min; 2.) DMSO, r.t., 2.5 h 2: 2-methyl-propan-2-ol / 2.03 h / Irradiation View Scheme