Dichloromethane → 6-Methyl-5-(6-(1-methyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyridine-3-carboxamido)nicotinic Acid

HRID 335303Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 335303
Br[C:2]1[CH:3]=[CH:4][C:5]2[N:6]([N:8]=[CH:9][C:10]=2[C:11]([NH:13][C:14]2[C:15]([CH3:24])=[N:16][CH:17]=[C:18]([CH:23]=2)[C:19]([O:21]C)=[O:20])=[O:12])[CH:7]=1.[CH3:25][N:26]1[CH:30]=[C:29](B2OC(C)(C)C(C)(C)O2)[CH:28]=[N:27]1.C(=O)([O-])[O-].[Cs+].[Cs+].C(Cl)Cl>COCCOC.O>[CH3:24][C:15]1[C:14]([NH:13][C:11]([C:10]2[CH:9]=[N:8][N:6]3[CH:7]=[C:2]([C:29]4[CH:28]=[N:27][N:26]([CH3:25])[CH:30]=4)[CH:3]=[CH:4][C:5]=23)=[O:12])=[CH:23][C:18]([C:19]([OH:21])=[O:20])=[CH:17][N:16]=1

Komponenten

7

Edukt 4

HCID 6344DichloromethaneHCID 10796Cesium carbonateHCID 27739871-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleHCID 71282967Methyl 5-(6-bromopyrazolo[1,5-a]pyridine-3-carboxamido)-6-methylnicotinate

Produkt 1

HCID 712833496-Methyl-5-(6-(1-methyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyridine-3-carboxamido)nicotinic Acid

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 80711,2-DimethoxyethaneLösungsmittel

Reaktionsbedingungen

Temperatur
100 °C

Versuchsvorschrift

Methyl 5-(6-bromopyrazolo[1,5-a]pyridine-3-carboxamido)-6-methylnicotinate (step 1) (7 g, 17.99 mmol), 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (4.49 g, 21.58 mmol) and cesium carbonate (23.44 g, 71.9 mmol) were stirred in 1,2-dimethoxyethane (60 ml) and water (25.00 ml). The mixture was degassed thoroughly refilling with nitrogen. PdCl2(dppf).CH2Cl2 adduct (0.350 g, 0.429 mmol) was added and the mixture was degassed thoroughly refilling with nitrogen, The mixture was stirred at 100° C. for 7 hrs and then cooled to 50° C. and filtered through glass-fiber paper. The filtrate was acidified to pH 5 by the addition of 2M HCl and filtered. The foam residue was dissolved in DCM/MeOH (1:1) and azeotroped with toluene (×2). The resulting solid was dried in a vacuum oven to afford the title compound;

Aufarbeitung

  1. customThe mixture was degassed thoroughly
  2. customthe mixture was degassed thoroughly
  3. temperaturecooled to 50° C.
  4. filtrationfiltered through glass-fiber paper
  5. additionThe filtrate was acidified to pH 5 by the addition of 2M HCl
  6. filtrationfiltered
  7. dissolutionThe foam residue was dissolved in DCM/MeOH (1:1)
  8. customazeotroped with toluene (×2)
  9. customThe resulting solid was dried in a vacuum oven

Quellen und Nachweise

ORD-Eintrag
ord-6fb19a769cd74750b26af5bf58535f52
Quelldatensatz
uspto-grants-2014_11
Patentnummer
US08883819B2

Notizen zur Reaktion

Wird geladen…