Hydrogen Bromide → HCID 22262558, compound

HRID 2230335Notes

Reaction equation

HRID 2230335 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:12]([C:13]3[CH:18]=[CH:17][N:16]=[CH:15][CH:14]=3)=[C:11]([C:19]3[CH:24]=[CH:23][N:22]=[C:21]([O:25]C)[CH:20]=3)[N:10]([CH2:27][CH2:28][OH:29])[N:9]=2)=[CH:4][CH:3]=1.Br.O.[OH-].[NH4+]>C(O)(=O)C>[F:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[C:12]([C:13]3[CH:14]=[CH:15][N:16]=[CH:17][CH:18]=3)=[C:11]([C:19]3[CH:24]=[CH:23][NH:22][C:21](=[O:25])[CH:20]=3)[N:10]([CH2:27][CH2:28][OH:29])[N:9]=2)=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 260Hydrogen BromideHCID 962WaterHCID 14923Ammonium HydroxideHCID 22037197HCID 22037197, compound

Product 1

HCID 22262558HCID 22262558, compoundYield 31%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

To a solution of 3-(4-fluorophenyl)-5-(2-methoxy-4-pyridinyl)-4-(4-pyridinyl)-1H-pyrazole-1-ethanol (0.28 g, 0.0006 mol) in 5 mL of acetic acid was added 3 mL of 48% hydrobromic acid. The reaction mixture was heated at reflux for 3 hour. The cooled mixture was then treated with water, basified with ammonium hydroxide and extracted with ethyl acetate. The organic layer was washed with brine, dried over magnesium sulfate and filtered. The filtrate was concentrated and purified by chromatography on silica gel (MeOH/CH2Cl2/NH4OH, 5:94:1) to give 0.07 g of product, 4-[3-(4-fluorophenyl)-1-(2-hydroxyethyl)-4-(4-pyridinyl)-1H-pyrazol-5-yl]-2(1H)-pyridinone, as a yellow solid (32% yield), mp: 250-251° C.; 1H NMR (DMSO-d6): δ11.74 (s, 1H), 8.45 (d, J=5.0 Hz, 2H), 7.35 (m, 3H), 7.16 (m, 2H), 7.03 (d, J=5.0 Hz, 2H), 6.37 (s, 1H), 6.05 (d, J=5.2 Hz, 1H), 5.0 (m, 1H), 4.13 (m, 2H), 3.81 (m, 2H); Anal. Calc'd for C21H17FN4O2.0.2 H2): C, 66.06; H, 4.65; N, 14.67. Found: C, 66.31; H, 4.49; N, 14.27.

Workup

  1. temperatureThe reaction mixture was heated
  2. temperatureat reflux for 3 hour
  3. extractionextracted with ethyl acetate
  4. washThe organic layer was washed with brine
  5. dry with materialdried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationThe filtrate was concentrated
  8. custompurified by chromatography on silica gel (MeOH/CH2Cl2/NH4OH, 5:94:1)

Sources & evidence

ORD record
ord-a0e58f69c5eb4044879a74f459538325
Source dataset
uspto-grants-2002_07
Patent number
US06423713B1

Reaction notes

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