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Hydrochloric Acid → 4-{[(2-{[5-(4-t-Butylphenyl)-4-hydroxy-3-thienyl]methylene}hydrazino)carbonothioyl]amino}benzoic acid

HRID 2103866
Notes
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Reaction equation

HRID 2103866 reaction equation
[C:1]([C:5]1[CH:10]=[CH:9][C:8]([C:11]2[S:12][CH:13]=[C:14]([CH:17]=O)[C:15]=2[OH:16])=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2].[NH:19]([C:21]([NH:23][C:24]1[CH:32]=[CH:31][C:27]([C:28]([OH:30])=[O:29])=[CH:26][CH:25]=1)=[S:22])[NH2:20].Cl>CN(C)C=O>[C:1]([C:5]1[CH:6]=[CH:7][C:8]([C:11]2[S:12][CH:13]=[C:14]([CH:17]=[N:20][NH:19][C:21]([NH:23][C:24]3[CH:32]=[CH:31][C:27]([C:28]([OH:30])=[O:29])=[CH:26][CH:25]=3)=[S:22])[C:15]=2[OH:16])=[CH:9][CH:10]=1)([CH3:2])([CH3:3])[CH3:4]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 27573784-(4-Carboxyphenyl)-3-thiosemicarbazideHCID 860145662-(4-t-Butylphenyl)-3-hydroxy-4-formylthiophene

Product 1

HCID 723600074-{[(2-{[5-(4-t-Butylphenyl)-4-hydroxy-3-thienyl]methylene}hydrazino)carbonothioyl]amino}benzoic acidYield 23.2%

Reagents, catalysts & solvents 1

HCID 6228
Dimethylformamide
Solvent

Procedure

2-(4-t-Butylphenyl)-3-hydroxy-4-formylthiophene (50 mg, 0.19 mmol) synthesized in Reference Synthetic Example 25 and 4-hydrazinocarbonothioylaminobenzoic acid (40 mg, 0.19 mmol) were stirred with dimethylformamide (1.9 mL) and concentrated hydrochloric acid (0.1 mL) at room temperature for 12 hours. The reaction solution was partitioned between ethyl acetate and water, and the organic layer was washed with saturated aqueous sodium chloride and dried over anhydrous sodium sulfate. The resulting organic layer was concentrated and purified by silica gel column chromatography (chloroform). Methanol/chloroform was added to the resulting crude product, and the precipitated yellow solid was recovered by filtration to give the desired product as a pale yellow solid (20 mg, yield 23%).

Workup

  1. customThe reaction solution was partitioned between ethyl acetate and water
  2. washthe organic layer was washed with saturated aqueous sodium chloride
  3. dry with materialdried over anhydrous sodium sulfate
  4. concentrationThe resulting organic layer was concentrated
  5. custompurified by silica gel column chromatography (chloroform)
  6. additionMethanol/chloroform was added to the resulting crude product
  7. filtrationthe precipitated yellow solid was recovered by filtration

Sources & evidence

ORD record
ord-51eefbe80aa24354af3abbb0aedae27d
Source dataset
uspto-grants-2009_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07576115B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes