5-Methoxycarbonyl-2-thiophenecarboxylic acid hydrazide → methyl 5-[(2-{1-[5-(4-t-butylphenyl)-4-hydroxy-1-methyl-1H-pyrazol-3-yl]ethylidene}hydrazino)carbonyl]-2-thiophenecarboxylate

HRID 1881595Notes

Reaction equation

HRID 1881595 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](=O)[CH3:18])[C:12]=2[OH:20])=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2].[NH:21]([C:23]([C:25]1[S:29][C:28]([C:30]([O:32][CH3:33])=[O:31])=[CH:27][CH:26]=1)=[O:24])[NH2:22]>CN(C)C=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:22][NH:21][C:23]([C:25]3[S:29][C:28]([C:30]([O:32][CH3:33])=[O:31])=[CH:27][CH:26]=3)=[O:24])[CH3:18])[C:12]=2[OH:20])=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2]

Participants

4

Reactant 2

HCID 148719615-Methoxycarbonyl-2-thiophenecarboxylic acid hydrazideHCID 670500841-[5-(4-t-Butylphenyl)-4-hydroxy-1-methyl-1H-pyrazol-3-yl]ethanone

Product 1

HCID 72359930methyl 5-[(2-{1-[5-(4-t-butylphenyl)-4-hydroxy-1-methyl-1H-pyrazol-3-yl]ethylidene}hydrazino)carbonyl]-2-thiophenecarboxylateYield 31.4%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
110 °C

Procedure

1-[5-(4-t-Butylphenyl)-4-hydroxy-1-methyl-1H-pyrazol-3-yl]ethanone (38.0 mg, 0.14 mmol) and methyl 5-hydrazinocarbonyl-2-thiophenecarboxylate (27.9 mg, 0.14 mmol) were dissolved in dimethylformamide (2.0 mL) and stirred at 110° C. for 12 hours. After cooling, the solvent was evaporated, and ethyl acetate was added to the resulting crude product. The precipitated solid was recovered by filtration to give 20.0 mg of the desired product as a pale yellow solid (yield 31%).

Workup

  1. temperatureAfter cooling
  2. customthe solvent was evaporated
  3. additionethyl acetate was added to the resulting crude product
  4. filtrationThe precipitated solid was recovered by filtration

Sources & evidence

ORD record
ord-dfc95d35cc1f4433b69cbe0f622a95fb
Source dataset
uspto-grants-2012_11
Patent number
US08318796B2

Reaction notes

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