sodium methylate in methanol 8 h; Heating;

1: 77 percent / benzyltriethylammonium chloride, 50percent aq. NaOH / CH2Cl2; 1,2-dimethoxy-ethane / 0.83 h 2: 58 percent / 1 M NaOMe / methanol / 8 h / Heating View Scheme

sodium hydroxide in methanol 3 h; Heating;