Hydrochloric Acid → 4-[(2-{1-[5-(4-tert-butylphenyl)-4-hydroxy-1-methyl-1H-pyrazol-3-yl]ethylidene}hydrazino)carbonyl]-2-nitrobenzoic acid

HRID 1881608Notes

Reaction equation

HRID 1881608 reaction equation
[C:1]([C:5]1[CH:10]=[CH:9][C:8]([C:11]2[N:15]([CH3:16])[N:14]=[C:13]([C:17](=[N:19][NH:20][C:21]([C:23]3[CH:32]=[CH:31][C:26]([C:27]([O:29]C)=[O:28])=[C:25]([N+:33]([O-:35])=[O:34])[CH:24]=3)=[O:22])[CH3:18])[C:12]=2[OH:36])=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2].CO.[OH-].[Na+].Cl>O>[C:1]([C:5]1[CH:10]=[CH:9][C:8]([C:11]2[N:15]([CH3:16])[N:14]=[C:13]([C:17](=[N:19][NH:20][C:21]([C:23]3[CH:32]=[CH:31][C:26]([C:27]([OH:29])=[O:28])=[C:25]([N+:33]([O-:35])=[O:34])[CH:24]=3)=[O:22])[CH3:18])[C:12]=2[OH:36])=[CH:7][CH:6]=1)([CH3:2])([CH3:3])[CH3:4]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 887MethanolHCID 14798Sodium HydroxideHCID 86604753methyl 4-[(2-{1-[5-(4-tert-butylphenyl)-4-hydroxy-1-methyl-1H-pyrazol-3-yl]ethylidene}hydrazino)carbonyl]-2-nitrobenzoate

Product 1

HCID 723599684-[(2-{1-[5-(4-tert-butylphenyl)-4-hydroxy-1-methyl-1H-pyrazol-3-yl]ethylidene}hydrazino)carbonyl]-2-nitrobenzoic acidYield 58%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

To methyl 4-[(2-{1-[5-(4-tert-butylphenyl)-4-hydroxy-1-methyl-1H-pyrazol-3-yl]ethylidene}hydrazino)carbonyl]-2-nitrobenzoate (0.945 mmol, 466.2 mg), methanol (33 mL) was added, and 1 M aqueous sodium hydroxide (4.7 mmol, 4.7 mL) was added. After about 26 hours of stirring at room temperature and 3 hours of stirring at 40° C., 1 M hydrochloric acid (4.7 mmol, 4.7 mL) and water were added. The precipitated solid was recovered by filtration, washed with water and dried by means of a vacuum pump. The resulting yellow solid (359.5 mg) was dissolved in THF (50 mL) and stirred at room temperature for 2 days. The insolubles were filtered off, and the filtrate was concentrated and dried by means of a vacuum pump. After addition of chloroform, the precipitated solid was recovered by filtration and dried by means of a vacuum pump to give the desired product as a pale yellow solid (260.7 mg, yield 58%).

Workup

  1. stirringof stirring at 40° C.
  2. filtrationThe precipitated solid was recovered by filtration
  3. washwashed with water
  4. customdried by means of a vacuum pump
  5. dissolutionThe resulting yellow solid (359.5 mg) was dissolved in THF (50 mL)
  6. stirringstirred at room temperature for 2 days
  7. filtrationThe insolubles were filtered off
  8. concentrationthe filtrate was concentrated
  9. customdried by means of a vacuum pump
  10. additionAfter addition of chloroform
  11. filtrationthe precipitated solid was recovered by filtration
  12. customdried by means of a vacuum pump

Sources & evidence

ORD record
ord-98f36c7370964b39b433e21ebdd7b8b6
Source dataset
uspto-grants-2012_11
Patent number
US08318796B2

Reaction notes

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