Triethylamine → HCID 178522056, Verbindung

To 3-(4-Pyridin-4-yl-1H-pyrazol-3-yl)-phenylamine (700 mg, 3 mmol) in anhydrous pyridine (15 mL) at 0° C. 4-trifluoromethylphenylisocyanate (420 μL, 3 mmol) was added. The reaction was stirred for 2 hours at 0° C. under nitrogen atmosphere to give a mixture of monourea and bis-urea as regioisomeric mixture. Solvent was removed under reduced pressure. The residue was dissolved in methanol (15 mL) and triethylamine (1 mL, 7.8 mmol) was added and the reaction was stirred at room temperature overnight. After this time only the monourea could be detected by HPLC/MS. The solvent was removed under reduced pressure and the residue was dissolved in ethyl acetate (100 mL) and washed successively with water (3×50 mL). The crude was purified by silica gel column chromatography (DCM/methanol 9:1) to give the desired product as a white solid (75%).

1. customat 0° C
2. customto give
3. customSolvent was removed under reduced pressure
4. dissolutionThe residue was dissolved in methanol (15 mL)
5. stirringthe reaction was stirred at room temperature overnight
6. customThe solvent was removed under reduced pressure
7. dissolutionthe residue was dissolved in ethyl acetate (100 mL)
8. washwashed successively with water (3×50 mL)
9. customThe crude was purified by silica gel column chromatography (DCM/methanol 9:1)

ORD-Eintrag

ord-568357e338334b369eb32b7a7405ce38

Quelldatensatz

uspto-grants-2013_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08541575B2