1: 75 mg / 0.1N NaOH/MeOH / dimethylformamide / 3 h / Ambient temperature 2: 45 mg / dimethylsulfoxide / 3 h / 130 °C 3: 14 mg / diethyl ether / Ambient temperature View Scheme

1: 200 mg / dimethylsulfoxide / 6 h / 120 °C 2: 120 mg / diethyl ether / Ambient temperature View Scheme

in diethyl ether Ambient temperature;

in diethyl ether Ambient temperature;