1: 98 percent / KOH, H2 / 5percent Pd/BaSO4 / methanol / 1810.02 Torr 2: 68 percent / N,N-dimethylchloromethyleniminium chloride, NaBH4 / CH2Cl2; tetrahydrofuran; acetonitrile; dimethylformamide / 3 h / -78 - -20 °C 3: 71 percent / methanol / 12 h / Heating View Scheme

in methanol 12 h; Heating;

1: 68 percent / N,N-dimethylchloromethyleniminium chloride, NaBH4 / CH2Cl2; tetrahydrofuran; acetonitrile; dimethylformamide / 3 h / -78 - -20 °C 2: 71 percent / methanol / 12 h / Heating View Scheme