Sodium Carbonate → 1-[2-Fluoro-3-(1-methyl-1H-pyrazol-4-yl)phenyl]-N,5-dimethoxy-N-methyl-4-oxo-1,4-dihydropyridazine-3-carboxamide

HRID 1895176Notes

Reaction equation

HRID 1895176 reaction equation
Br[C:2]1[C:3]([F:23])=[C:4]([N:8]2[CH:13]=[C:12]([O:14][CH3:15])[C:11](=[O:16])[C:10]([C:17]([N:19]([O:21][CH3:22])[CH3:20])=[O:18])=[N:9]2)[CH:5]=[CH:6][CH:7]=1.[CH3:24][N:25]1[CH:29]=[C:28](B2OC(C)(C)C(C)(C)O2)[CH:27]=[N:26]1.C([O-])([O-])=O.[Na+].[Na+]>COCCOC.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[F:23][C:3]1[C:2]([C:28]2[CH:27]=[N:26][N:25]([CH3:24])[CH:29]=2)=[CH:7][CH:6]=[CH:5][C:4]=1[N:8]1[CH:13]=[C:12]([O:14][CH3:15])[C:11](=[O:16])[C:10]([C:17]([N:19]([O:21][CH3:22])[CH3:20])=[O:18])=[N:9]1

Participants

7

Reactant 3

HCID 10340Sodium CarbonateHCID 27739871-Methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazoleHCID 866439361-(3-Bromo-2-fluorophenyl)-N,5-dimethoxy-N-methyl-4-oxo-1,4-dihydropyridazine-3-carboxamide

Product 1

HCID 594361531-[2-Fluoro-3-(1-methyl-1H-pyrazol-4-yl)phenyl]-N,5-dimethoxy-N-methyl-4-oxo-1,4-dihydropyridazine-3-carboxamideYield 69%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent2×HCID 80711,2-DimethoxyethaneSolvent

Procedure

A mixture of 1-(3-bromo-2-fluorophenyl)-N,5-dimethoxy-N-methyl-4-oxo-1,4-dihydropyridazine-3-carboxamide (500 mg, 1.29 mmol), 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (295 mg, 1.42 mmol), Na2CO3 (302 mg, 2.85 mmol) and Pd(PPh3)4 (74.5 mg, 0.0645 mmol) in DME (11.4 mL) and water (2.9 mL) was heated to reflux for 15 h under Ar. The mixture was diluted with water, extracted with EtOAc, washed with brine, dried over Na2SO4, filtered, concentrated in vacuo, and purified by column chromatography on basic silica gel (EtOAc/MeOH=100/0 to 70/30) to yield the title compound (345 mg, 69% yield) as a white solid: 1H NMR (DMSO-d6, 300 MHz): δ ppm 3.25 (3H, s), 3.59 (3H, s), 3.80 (3H, s), 3.90 (3H, s), 7.35-7.44 (1H, m), 7.50-7.59 (1H, m), 7.84-7.94 (1H, m), 7.97 (1H, s), 8.23 (1H, d, J=2.5 Hz), 8.58 (1H, s).

Workup

  1. temperaturewas heated
  2. temperatureto reflux for 15 h under Ar
  3. extractionextracted with EtOAc
  4. washwashed with brine
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. custompurified by column chromatography on basic silica gel (EtOAc/MeOH=100/0 to 70/30)

Sources & evidence

ORD record
ord-d28b1c8b04ba4d33a50a4cecc6ec34a8
Source dataset
uspto-grants-2013_08
Patent number
US08513251B2

Reaction notes

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