Water → HCID 87130437, compound

Temperature

-78 °C

To a solution of DIPA (1.1 mL, 7.75 mmol)) in THF (820 mL) cooled to −78° C., was added n-BuLi (2.5N in hexanes, 3 mL). The mixture was stirred 5 minutes at this temperature and was warmed in an ice-bath. After 10 min, the mixture was cooled down to −78° C. and a solution of 3-fluoro-6-methoxy-quinoline (see WO 2005/054232; 0.95 g, 6.46 mmol) in THF (8+2 mL rinse) was added. The reaction proceeded for 4 h. DMF (0.75 mL, 9.68 mmol) was added. The mixture was stirred 30 min at −78° C. The mixture was warmed to rt, stirred further 30 min and water (20 mL) was added. The two layers were decanted. The aq. layer was extracted with EA (2×50 mL). The combined org. layers were washed with brine, dried over Na2SO4, filtered and concentrated to dryness. The residue was chromatographed (Hept-EA 1-1) to afford first the starting material and then the expected aldehyde (0.17 g) as a 2-1 mixture with its regioisomer.

1. temperaturewas warmed in an ice-bath
2. waitAfter 10 min
3. waitThe reaction proceeded for 4 h
4. stirringThe mixture was stirred 30 min at −78° C
5. temperatureThe mixture was warmed to rt
6. stirringstirred further 30 min
7. customThe two layers were decanted
8. extractionThe aq. layer was extracted with EA (2×50 mL)
9. washlayers were washed with brine
10. dry with materialdried over Na2SO4
11. filtrationfiltered
12. concentrationconcentrated to dryness
13. customThe residue was chromatographed (Hept-EA 1-1)
14. customto afford first the starting material

ORD record

ord-7e0e37b9afc34c97941532b3194d0a35

Source dataset

uspto-grants-2012_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08114867B2