sodium hydroxide; dimethyl sulfate in ethanol 4 h; Ambient temperature;

1: 1.)NaNO2, conc. HCl, 2.) 10percent NaOH / 2.) -5 deg C to 0 deg C, 2h 2: 93 percent / 5percent NaOH, Dimethylsulfat / ethanol / 4 h / Ambient temperature View Scheme