Hydrochloric Acid → N-{[2-{[4-(2,6-difluoro-4-pyridinyl)phenyl]methyl}-5-hydroxy-6-(1-methylethyl)-3-oxo-2,3-dihydro-4-pyridazinyl]carbonyl}glycine

HRID 1822412Notes

Reaction equation

HRID 1822412 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([CH2:8][N:9]2[C:14](=[O:15])[C:13]([C:16]([NH:18][CH2:19][C:20]([OH:22])=[O:21])=[O:17])=[C:12]([OH:23])[C:11]([CH:24]([CH3:26])[CH3:25])=[N:10]2)=[CH:4][CH:3]=1.[F:27][C:28]1[CH:33]=[C:32](B(O)O)[CH:31]=[C:30]([F:37])[N:29]=1.C(=O)([O-])[O-].[K+].[K+].Cl>O1CCOCC1.O.CO.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:27][C:28]1[CH:33]=[C:32]([C:2]2[CH:7]=[CH:6][C:5]([CH2:8][N:9]3[C:14](=[O:15])[C:13]([C:16]([NH:18][CH2:19][C:20]([OH:22])=[O:21])=[O:17])=[C:12]([OH:23])[C:11]([CH:24]([CH3:26])[CH3:25])=[N:10]3)=[CH:4][CH:3]=2)[CH:31]=[C:30]([F:37])[N:29]=1

Participants

9

Reactant 4

HCID 313Hydrochloric AcidHCID 11430Potassium CarbonateHCID 27627472,6-Difluoropyridine-4-boronic acidHCID 54739228N-{[2-[(4-Bromophenyl)methyl]-5-hydroxy-6-(1-methylethyl)-3-oxo-2,3-dihydro-4-pyridazinyl]carbonyl}glycine

Product 1

HCID 54739206N-{[2-{[4-(2,6-difluoro-4-pyridinyl)phenyl]methyl}-5-hydroxy-6-(1-methylethyl)-3-oxo-2,3-dihydro-4-pyridazinyl]carbonyl}glycineYield 45.2%

Reagents, catalysts & solvents 4

HCID 178418397HCID 178418397, compoundCatalystHCID 887MethanolSolventHCID 962WaterSolvent2×HCID 312751,4-DioxaneSolvent

Procedure

To a 5 mL microwave tube was added N-{[2-[(4-bromophenyl)methyl]-5-hydroxy-6-(1-methylethyl)-3-oxo-2,3-dihydro-4-pyridazinyl]carbonyl}glycine (example 61, 31 mg, 0.073 mmol), 2,6-difluoropyridine-4-boronic acid (11.61 mg, 0.073 mmol), potassium carbonate (30.3 mg, 0.219 mmol), and tetrakis(triphenylphosphine)palladium (0) (2.53 mg, 2.192 μmol) in 1,4-Dioxane (1.5 ml) and Water (0.500 ml). The mixture was irradiated at 100° C. for 20 minutes. The reaction mixture was diluted with water (4 ml), acidified with 1N HCl (1 ml), and diluted with methanol (2 ml) then filtered to remove any residue followed by purification by HPLC chromatography (ODS silica, gradient 10-75% acetonitrile/water (0.1% TFA)) to afford the title compound N-{[2-{[4-(2,6-difluoro-4-pyridinyl)phenyl]methyl}-5-hydroxy-6-(1-methylethyl)-3-oxo-2,3-dihydro-4-pyridazinyl]carbonyl}glycine (15 mg, 0.033 mmol, 44.8% yield) as a white powder. 1H NMR (400 MHz, DMSO-d6) d ppm 15.91 (s, 1H), 12.98 (s, 1H), 10.17 (t, J=5.56 Hz, 1H), 7.89 (d, J=8.34 Hz, 2H), 7.57 (s, 2H), 7.45 (d, J=8.34 Hz, 2H), 5.33 (s, 2H), 4.10 (d, J=5.56 Hz, 2H), 3.20 (sept, J=6.82 Hz, 1H), 1.21 (d, J=6.82 Hz, 6H). MS (ES+) m/e 459 [M+H]+.

Workup

  1. customThe mixture was irradiated at 100° C. for 20 minutes
  2. filtrationthen filtered
  3. customto remove any residue
  4. customfollowed by purification by HPLC chromatography (ODS silica, gradient 10-75% acetonitrile/water (0.1% TFA))

Sources & evidence

ORD record
ord-e53737980c3848899ef696a356cbc460
Source dataset
uspto-grants-2009_10
Patent number
US07608621B2

Reaction notes

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