Ethyl Acetate → 2-(6-Fluoropyridin-3-yl)-2-methylpropan-1-ol

Temperature

0 °C

Lithium aluminum hydride (1.0M in THF) (Aldrich, St. Louis, Mo.; 12.98 mL, 12.98 mmol) was added to a solution of tert-butyl 2-(6-fluoropyridin-3-yl)-2-methylpropanoate (2.07 g, 8.65 mmol) in THF (34 mL) at 0° C. (gas evolution), and the resulting solution was stirred at 0° C. for 5 min. EtOAc (15 mL) was then added at 0° C. to quench excess lithium aluminum hydride, followed by 10% aqueous Na/K tartrate (150 mL). The resulting mixture was stirred at 25° C. for 10 min and then partitioned between EtOAc (200 mL) and water (50 mL). The organic layer was separated, and the aqueous layer was extracted with EtOAc (150 mL). The combined organic extracts were washed with brine (150 mL), dried over sodium sulfate, filtered, and concentrated in vacuo to provide 2-(6-fluoropyridin-3-yl)-2-methylpropan-1-ol (1.46 g, 8.63 mmol, 100% yield) as a colorless oil. 1H NMR (400 MHz, CDCl3) δ 8.22 (br. s., 1H), 7.78-7.84 (m, 1H), 6.89 (dd, J=8.6, 3.1 Hz, 1H), 3.63 (s, 2H), 1.36 (s, 6H). 19F NMR (377 MHz, CDCl3) δ −72.21 (br. s., 1 F). m/z (ESI, +ve) 170.2 (M+H)+.

1. customto quench excess lithium aluminum hydride
2. stirringThe resulting mixture was stirred at 25° C. for 10 min
3. custompartitioned between EtOAc (200 mL) and water (50 mL)
4. customThe organic layer was separated
5. extractionthe aqueous layer was extracted with EtOAc (150 mL)
6. washThe combined organic extracts were washed with brine (150 mL)
7. dry with materialdried over sodium sulfate
8. filtrationfiltered
9. concentrationconcentrated in vacuo

ORD record

ord-ef2a73a269b2459dbff7daa922adce56

Source dataset

uspto-grants-2013_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08362241B2