反应详情

温度

0 °C

N-Chloro-2-phenyl-acetamidine (154 mg, 0.92 mmol) was dissolved in methanol (4.6 mL) and cooled to 0° C. then potassium thiocyanate (89 mg, 0.92 mmol) was added and it was stirred for 1 h. The mixture was diluted with ethyl acetate (50 mL), stirred for 5 min and filtered. The filtrate was evaporated in vacuo and the residue was purified by flash column chromatography (Merck silica gel 60, 40-63 μm; 50% ethyl acetate/hexanes) to afford 3-benzyl-[1,2,4]thiadiazol-5-ylamine (93 mg, 53%) as an off-white solid: H1-NMR (400 MHz, CDCl3) δ=4.02 (2H, s), 5.94 (2H, br), 7.28 (5H, m).

1. stirringstirred for 5 min
2. filtrationfiltered
3. customThe filtrate was evaporated in vacuo
4. customthe residue was purified by flash column chromatography (Merck silica gel 60, 40-63 μm; 50% ethyl acetate/hexanes)