反应详情

To 20 ml of tetrahydrofran was dispersed 850 mg of lithium aluminum hydride. The dispersion was water cooled and stirred simultaneously with the dropwise addition of 2.80 g of methyl 6-t-butylamino-5-fluoro-2-(1,1,3,3-tetramethylbutylamino)nicotinate dissolved in 30 ml of tetrahydrofuran. The reactor was placed in an oil bath of 50° C., and the mixture was stirred for two and half hours. The reactor was then water cooled and 8 ml of ethyl acetate was added dropwise, and the mixture was stirred for 1 hour. 8 ml of ethanol was added dropwise, and the mixture was stirred for 1 hour, then 8 ml of distilled water was added dropwise, and the mixture was stirred overnight. The precipitate was separated by filtration, and the filtrate was concentrated under reduced pressure. The residue was subjected to column chromatography (silica gel, 40 g; eluent: chloroform:n-hexane, 1:1) to obtain 1.67 g of the title compound as a colorless oily residue.

1. temperaturecooled
2. customThe reactor was placed in an oil bath of 50° C.
3. stirringthe mixture was stirred for 1 hour
4. stirringthe mixture was stirred for 1 hour
5. stirringthe mixture was stirred overnight
6. customThe precipitate was separated by filtration
7. concentrationthe filtrate was concentrated under reduced pressure