1: 70 percent / NaBH4 / methanol / 1 h 2: 85 percent / NaOH on a carrier (0.8-1.6 mm, ca. 14-25 mesh ASTM; Cat. No. 1567, E. Merck) / dioxane / 0.17 h / Heating View Scheme

sodium tetrahydroborate in methanol 1 h;