Cyclohexanol → Cyclohexyl 2-chloro-6-(cyclohexyloxy)pyrimidine-4-carboxylate

Temperatur

0 °C

A cold (0° C.) solution of cyclohexanol (2.35 ml; 22.3 mmol) was treated with sodium hydride (534 mg; 22.3 mmol) in dry THF (25 ml) and stirred for 30 min at 0° C. It was slowly added to a cooled (0° C.) solution of cyclohexyl 2,6-dichloropyrimidine-4-carboxylate (Intermediate 31, 3.50 g; 12.72 mmol) in dry THF (70 ml) and the resulting mixture was stirred at 50° C. After 4 h the reaction was treated again with a solution cyclohexanol (0.34 ml; 3.18 mmol) and sodium hydride (76.3 mg; 3.18 mmol) in dry THF (3 mL) obtained as described above and it was stirred for an additional hour. The reaction mixture was concentrated under vacuum and the residue was taken up in EtOAc and the organic layer was washed with water, then brine, dried over MgSO4, filtered off and concentrated under vacuum to afford the title compound (4.80 g, 99%) without further purification.

1. additionIt was slowly added to
2. stirringthe resulting mixture was stirred at 50° C
3. customobtained
4. stirringwas stirred for an additional hour
5. concentrationThe reaction mixture was concentrated under vacuum
6. washthe organic layer was washed with water
7. dry with materialbrine, dried over MgSO4
8. filtrationfiltered off
9. concentrationconcentrated under vacuum

ORD-Eintrag

ord-24fbd9be81874c4fb690337f7e9af4ea

Quelldatensatz

uspto-grants-2013_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08399448B2