反应详情

The compound obtained in (a) (1.80 g, 10 mmol) was mixed with 50 ml of methanol, and sodium borohydride (189 mg, 5 mmol) was added portionwise while maintaining the temperature below 20° C. After stirring for 5 minutes at room temperature, the methanol was evaporated off and the medium was then poured onto a 6N HCl/ice mixture, extracted with ethyl ether, washed with water to neutral pH, dried over magnesium sulfate and filtered, and the solvents were evaporated off. The properties of the final product were as follows:

1. additionwas added portionwise
2. temperaturewhile maintaining the temperature below 20° C
3. customthe methanol was evaporated off
4. additionthe medium was then poured onto a 6N HCl/ice mixture
5. extractionextracted with ethyl ether
6. washwashed with water to neutral pH
7. dry with materialdried over magnesium sulfate
8. filtrationfiltered
9. customthe solvents were evaporated off