1: 100 percent / Zn powder / methanol / 48 h / Ambient temperature 2: 63 percent / DDQ / diethyl ether / 1 h / Ambient temperature 3: 95 percent / K2CO3 / acetone / 1 h / Heating View Scheme

1: zinc (dust) / methanol / 24 h 2: 1.) trifluoroacetic acid / 2.) metylation View Scheme

1: 100 percent / Zn powder / methanol / 48 h / Ambient temperature 2: 63 percent / DDQ / diethyl ether / 1 h / Ambient temperature 3: 49.4 percent / 8percent NaOH/MeOH / 6 h / Ambient temperature 4: 98 percent / K2CO3 / acetone / 1 h / Heating View Scheme

zinc in methanol 48 h; Ambient temperature;