Triethylamine → 6,8-dichloro-2-[1-(3-chloro-2-pyridinyl)-3-[(methylsulfonyl)oxy]-1H-pyrazol-5-yl]-4H-3,1-benzoxazin-4-one

HRID 1445539Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1445539
[CH3:1][S:2](Cl)(=[O:4])=[O:3].[Cl:6][C:7]1[C:8]([N:13]2[C:17]([C:18]([OH:20])=O)=[CH:16][C:15](=[O:21])[NH:14]2)=[N:9][CH:10]=[CH:11][CH:12]=1.C(N(CC)CC)C.[Cl:29][C:30]1[CH:38]=[C:37]([Cl:39])[CH:36]=[C:32]([C:33](O)=[O:34])[C:31]=1[NH2:40]>C(#N)C.O>[Cl:39][C:37]1[CH:38]=[C:30]([Cl:29])[C:31]2[N:40]=[C:18]([C:17]3[N:13]([C:8]4[C:7]([Cl:6])=[CH:12][CH:11]=[CH:10][N:9]=4)[N:14]=[C:15]([O:21][S:2]([CH3:1])(=[O:4])=[O:3])[CH:16]=3)[O:20][C:33](=[O:34])[C:32]=2[CH:36]=1

Komponenten

7

Edukt 4

HCID 8471Triethylamine2×HCID 31297Methanesulfonyl chloride2×HCID 760363,5-Dichloroanthranilic acidHCID 685431821-(3-Chloropyridin-2-yl)-3-hydroxy-1H-pyrazole-5-carboxylic acid

Produkt 1

HCID 866026636,8-dichloro-2-[1-(3-chloro-2-pyridinyl)-3-[(methylsulfonyl)oxy]-1H-pyrazol-5-yl]-4H-3,1-benzoxazin-4-one

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 6342AcetonitrileLösungsmittel3×

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

To a solution of methanesulfonyl chloride (0.14 mL, 1.75 mmol) in acetonitrile (10 mL) was added dropwise a mixture of 1-(3-chloro-2-pyridinyl)-2,3-dihydro-3-oxo-1H-pyrazole-5-carboxylic acid (i.e. the product of Step C) (0.4 g, 1.67 mmol) and triethylamine (0.23 mL, 1.67 mmol) in acetonitrile (3 mL) at 0-5° C. The reaction temperature was then maintained at about 0° C. throughout the addition. After stirring for 10 minutes, 3,5-dichloroanthranilic acid (Aldrich, 0.34 g, 1.67 mmol) was added and stirring was continued for an additional 5 minutes. A solution of triethylamine (0.47 mL, 3.33 mmol) in acetonitrile (3 mL) was then added dropwise, and the reaction mixture stirred 40 minutes, followed by the addition of methanesulfonyl chloride (0.14 mL, 1.75 mmol). The reaction mixture was then warmed to room temperature and stirred overnight. Approximately 50 mL of water was then added followed by extraction with ethyl acetate (3×30 mL). The combined ethyl acetate phase was washed with water (1×20 mL) followed by brine (1×20 mL), dried (MgSO4) and concentrated to yield 0.8 g of a crude yellow solid. Chromatography on silica gel using hexanes/ethyl acetate as eluent resulted in isolation of 0.11 g of the title compound as a yellow solid.

Aufarbeitung

  1. stirringstirring
  2. waitwas continued for an additional 5 minutes
  3. stirringthe reaction mixture stirred 40 minutes
  4. temperatureThe reaction mixture was then warmed to room temperature
  5. stirringstirred overnight
  6. extractionfollowed by extraction with ethyl acetate (3×30 mL)
  7. washThe combined ethyl acetate phase was washed with water (1×20 mL)
  8. dry with materialdried (MgSO4)
  9. concentrationconcentrated
  10. customto yield 0.8 g of a crude yellow solid

Quellen und Nachweise

ORD-Eintrag
ord-fd6041c2421f48248660f15d89c02432
Quelldatensatz
uspto-grants-2010_02
Patentnummer
US07666882B2

Notizen zur Reaktion

Wird geladen…