反应详情

温度

0 °C

To a solution of the compound of step 1 (2.0 g, 7.33 mmol) in tetrahydrofuran (30 ml) at -20° C. was added DIBAL-H. The mixture was warmed up to 0° C. and stirred at this temperature for 5 hours. Addition of methanol (5 ml) at 0° C. followed by addition of a saturated solution of Rochelle salt (10 ml) resulted in the formation of a white slurry. After stirring for an additional 2 hours, this was filtered; the filtrate was extracted with ether and the organic layer was washed with brine and dried over magnesium sulfate. Upon evaporation, the title compound was obtained as a slightly yellow oil (1.14 g, 4.6 mmol, 63% yield).

1. customresulted in the formation of a white slurry
2. stirringAfter stirring for an additional 2 hours
3. filtrationthis was filtered
4. extractionthe filtrate was extracted with ether
5. washthe organic layer was washed with brine
6. dry with materialdried over magnesium sulfate
7. customUpon evaporation