Tetrahydrofuran → HCID 86680495, compound

To a stirred solution of 4-iodopyridine (0.29 g, 0.463 mmol) in THF (30 mL) at −78° C. was added n-BuLi (2.4 mL, 3.9 mmol) and the mixture was stirred for 10 min. 1-(5-(4-Fluorophenyl)-1,2,4-oxadiazol-3-yl)ethanone (0.5 g, 2.79 mmol) in THF (5 mL) was then added to reaction, which was then stirred at −78° C. for 2 h. The reaction was then quenched with saturated ammonium chloride solution (10 mL) and diluted with ethyl acetate (50 mL). The organic layer was separated, washed with ammonium chloride solution (3×150 mL) followed by brine solution (2×20 mL), dried over sodium sulfate, filtered and concentrated under reduced pressure to obtain crude product. The crude product was purified by column chromatography (100-200μ silica gel and 30% ethyl acetate in hexane) to obtain 3-(4-fluorophenyl)-5-(1-(pyridin-4-yl)ethyl)isoxazole as off-white solid (0.06 g, 29% yield). 1H NMR (400 MHz, CDCl3): δ 8.60 (d, 2H), 8.11 (dd, 2H), 7.48 (d, 2H), 7.19 (t, 2H), 3.40 (s, 1H), 1.99 (s, 3H); LC-MS m/z calculated for [M+H]+ 286.09. found 286.2.

1. stirringwas then stirred at −78° C. for 2 h
2. customThe reaction was then quenched with saturated ammonium chloride solution (10 mL)
3. additiondiluted with ethyl acetate (50 mL)
4. customThe organic layer was separated
5. washwashed with ammonium chloride solution (3×150 mL)
6. dry with materialdried over sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure
9. customto obtain crude product
10. customThe crude product was purified by column chromatography (100-200μ silica gel and 30% ethyl acetate in hexane)

ORD record

ord-3d82e0ad00ff47cdb911cb3c48db378b

Source dataset

uspto-grants-2016_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09266873B2