Water → (S)-3-fluoroheptanol

Temperature

5 °C

To a 1 l flask were added 154 ml of THF and 2.3 g of lithium aluminum hydride under a nitrogen atmosphere, and the solution was kept at 5° C. To the solution was added dropwise a solution of 9 g of methyl 3-fluoroheptanoate in 43 ml of THF over 2 hours at 5° C. After the addition, the temperature was gradually elevated up to room temperature, and the mixture was stirred for 2 hours After cooling to 5° C., 2 3 g of water, 2.3 g of a 15% sodium hydride aqueous solution, and 6.9 g of water were added thereto dropwise in this order, followed by stirring at that temperature for 15 minutes. The thus formed precipitate was removed by filtration, and the filtrate was subjected to liquid-liquid separation. The organic layer was dehydrated over potassium carbonate and the solvent was removed by distillation at 30° C. or less to obtain 8.0 g (yield=98.0%) of the titled compound. NMR (ppm): 0.92 (3H, t, J=7.2 Hz), 1.3-1.9 (8H, m), 3.81 (2H, m), 4.70 (1H, m)

1. customwas kept at 5° C
2. additionAfter the addition
3. customwas gradually elevated up to room temperature
4. stirringby stirring at that temperature for 15 minutes
5. customThe thus formed precipitate was removed by filtration
6. customthe filtrate was subjected to liquid-liquid separation
7. customthe solvent was removed by distillation at 30° C. or less

ORD record

ord-1ff6a43b766046fe92dc48ab44dc21a8

Source dataset

uspto-grants-1995_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05454976