Cesium carbonate → N-(2,5-difluoro-4-((2-pivalamidopyridin-4-yl)oxy)phenyl)-4-ethoxy-1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamide

HRID 1411149Notes

Reaction equation

HRID 1411149 reaction equation
Cl[C:2]1[CH:7]=[C:6]([O:8][C:9]2[C:14]([F:15])=[CH:13][C:12]([NH:16][C:17]([C:19]3[C:20](=[O:35])[N:21]([C:28]4[CH:33]=[CH:32][C:31]([F:34])=[CH:30][CH:29]=4)[CH:22]=[CH:23][C:24]=3[O:25][CH2:26][CH3:27])=[O:18])=[C:11]([F:36])[CH:10]=2)[CH:5]=[CH:4][N:3]=1.[C:37]([NH2:43])(=[O:42])[C:38]([CH3:41])([CH3:40])[CH3:39].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2.C([O-])([O-])=O.[Cs+].[Cs+]>O1CCOCC1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[F:36][C:11]1[CH:10]=[C:9]([O:8][C:6]2[CH:5]=[CH:4][N:3]=[C:2]([NH:43][C:37](=[O:42])[C:38]([CH3:41])([CH3:40])[CH3:39])[CH:7]=2)[C:14]([F:15])=[CH:13][C:12]=1[NH:16][C:17]([C:19]1[C:20](=[O:35])[N:21]([C:28]2[CH:33]=[CH:32][C:31]([F:34])=[CH:30][CH:29]=2)[CH:22]=[CH:23][C:24]=1[O:25][CH2:26][CH3:27])=[O:18]

Participants

7

Reactant 4

HCID 10796Cesium carbonateHCID 12957TrimethylacetamideHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 86703361N-(4-((2-chloropyridin-4-yl)oxy)-2,5-difluorophenyl)-4-ethoxy-1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamide

Product 1

HCID 71575772N-(2,5-difluoro-4-((2-pivalamidopyridin-4-yl)oxy)phenyl)-4-ethoxy-1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamideYield 29.7%

Reagents, catalysts & solvents 2

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

N-(4-((2-chloropyridin-4-yl)oxy)-2,5-difluorophenyl)-4-ethoxy-1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamide (0.15 g, 0.29 mmol, see: Example 1) was combined with pivalamide (0.12 g, 1.16 mmol), Xantphos (0.02 g, 0.033 mmol), and Cs2CO3 (0.14 g, 0.44 mmol) in dioxane (5 mL). The mixture was sparged with argon for several min, treated with Pd2(dba)3 (0.015 g, 0.016 mmol), and heated at 100° C. overnight. The mixture was cooled to RT and filtered, washing with dioxane. The filtrate was concentrated to dryness and the residue was purified by reverse-phase chromatography [10%-45% CH3CN/H2O with 0.1% TFA]. The pure fractions were combined and co-evaporated with MeOH. The aqueous layer was neutralized with NaHCO3 and extracted with EtOAc. The organic layer was washed with brine, dried over Na2SO4, and concentrated to obtain N-(2,5-difluoro-4-((2-pivalamidopyridin-4-yl)oxy)phenyl)-4-ethoxy-1-(4-fluorophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamide (50 mg, 29.6% yield). 1H NMR (400 MHz, DMSO-d6): δ 11.23 (s, 1H), 9.89 (s, 1H), 8.34 (dd, J=12.6, 7.2 Hz, 1H), 8.21 (d, J=5.7 Hz, 1H), 7.92 (d, J=7.8 Hz, 1H), 7.66 (d, J=2.4 Hz, 1H,) 7.51-7.48 (m, 3H), 7.36 (t, J=8.7 Hz, 2H), 6.76 (dd, J=5.7, 2.5 Hz, 1H), 6.55 (d, J=7.9 Hz, 1H), 4.28-4.27 (m, 2H), 1.34 (t, J=6.98 Hz, 3H), 1.05 (s, 9H); MS (ESI) m/z: 581.2 (M+H+).

Workup

  1. customThe mixture was sparged with argon for several min
  2. temperatureThe mixture was cooled to RT
  3. filtrationfiltered
  4. washwashing with dioxane
  5. concentrationThe filtrate was concentrated to dryness
  6. customthe residue was purified by reverse-phase chromatography [10%-45% CH3CN/H2O with 0.1% TFA]
  7. extractionextracted with EtOAc
  8. washThe organic layer was washed with brine
  9. dry with materialdried over Na2SO4
  10. concentrationconcentrated

Sources & evidence

ORD record
ord-b48cd7399e0b494cb64755526e07306a
Source dataset
uspto-grants-2014_12
Patent number
US08921565B2

Reaction notes

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