反应详情

To a solution of 3-(4-methoxyphenyl)-[1,2,4]thiadiazole-5-carboxylic acid ethyl ester (0.24 g, 0.90 mmol) in MeOH (10 ml) was added sodium borohydride (0.058 g, 1.54 mmol) portion wise. The resulting reaction mixture was stirred at room temperature for 2 h. After the completion of the reaction (TLC monitoring), the reaction mass was cooled to 0° C., quenched it with 2 ml of water and concentrated under vacuum. Added water (50 ml) and extracted with ethyl acetate (3×50 ml). The combined organic layer was dried over Na2SO4, filtered and concentrated under vacuum. The crude residue was purified over silica gel (100-200 M, 20% EtOAc-Hexane) to get the product (0.072 g, 43%) that was carried forward to the next step without further purification.

1. customThe resulting reaction mixture
2. customAfter the completion of the reaction (TLC monitoring)
3. temperaturethe reaction mass was cooled to 0° C.
4. customquenched it with 2 ml of water
5. concentrationconcentrated under vacuum
6. extractionAdded water (50 ml) and extracted with ethyl acetate (3×50 ml)
7. dry with materialThe combined organic layer was dried over Na2SO4
8. filtrationfiltered
9. concentrationconcentrated under vacuum
10. customThe crude residue was purified over silica gel (100-200 M, 20% EtOAc-Hexane)