Oxalyl chloride → HCID 66749622, Verbindung

Temperatur

0 °C

A solution of 2-(2-acetamido-5-methylpyridin-4-yl)-5-(2-chlorophenyl)-1,3-oxazole-4-carboxylic acid (0.50 g, 1.34 mmol) in DCM (15 mL) and DMF (0.05 mL) was allowed to stir at 0° C. To this solution was added oxalyl chloride (0.23 mL, 2.69 mmol) dropwise. The reaction mixture was allowed to stir at 0° C. for 15 minutes and then allowed to warm to rt and stir for 2 hr. The reaction mixture was concentrated, and then DCM (15 mL) and TEA (0.38 mL, 2.69 mmol) were added. The reaction mixture was allowed to stir at 0° C. and a solution of 2,2-dimethoxyethanamine (0.29 mL, 2.69 mmol) in DCM (5 mL) was added dropwise. The reaction mixture was allowed to warm to rt and to stir overnight and then concentrated. The residue was redissolved in water and EtOAc. The organic solution was separated and the aqueous solution was further extracted with EtOAc. The organic solutions were combined, dried over MgSO4, filtered and concentrated. The residue was purified by column chromatography to give 2-(2-acetamido-5-methylpyridin-4-yl)-5-(2-chlorophenyl)-N-(2,2-dimethoxyethyl)-1,3-oxazole-4-carboxamide (0.226 g, 37%). LCMS (FA): m/z=459 (M+H).

1. stirringto stir at 0° C. for 15 minutes
2. temperatureto warm to rt
3. stirringstir for 2 hr
4. concentrationThe reaction mixture was concentrated
5. stirringto stir at 0° C.
6. temperatureto warm to rt
7. stirringto stir overnight
8. concentrationconcentrated
9. dissolutionThe residue was redissolved in water
10. customThe organic solution was separated
11. extractionthe aqueous solution was further extracted with EtOAc
12. dry with materialdried over MgSO4
13. filtrationfiltered
14. concentrationconcentrated
15. customThe residue was purified by column chromatography

ORD-Eintrag

ord-048c02e771a34eef9492b8f41b0fe047

Quelldatensatz

uspto-grants-2014_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08859768B2