Hydrochloric Acid → 2-(3-{(3,4-Dimethoxyphenyl)-[4-(5-methyl-[1,2,4]oxadiazol-3-yl)phenylimino]methyl}-5-oxo-4,5-dihydro-[1,2,4]triazol-1-yl)benzoic acid

HRID 1161450Notes

Reaction equation

HRID 1161450 reaction equation
Cl.[NH:2]([C:4]1[CH:12]=[CH:11][CH:10]=[CH:9][C:5]=1[C:6]([OH:8])=[O:7])[NH2:3].C(N(CC)CC)C.C[O:21][C:22](=O)[N:23]=[C:24](SC)[C:25]([C:39]1[CH:44]=[CH:43][C:42]([O:45][CH3:46])=[C:41]([O:47][CH3:48])[CH:40]=1)=[N:26][C:27]1[CH:32]=[CH:31][C:30]([C:33]2[N:37]=[C:36]([CH3:38])[O:35][N:34]=2)=[CH:29][CH:28]=1.Cl>CN(C=O)C.O>[CH3:48][O:47][C:41]1[CH:40]=[C:39]([C:25](=[N:26][C:27]2[CH:32]=[CH:31][C:30]([C:33]3[N:37]=[C:36]([CH3:38])[O:35][N:34]=3)=[CH:29][CH:28]=2)[C:24]2[NH:23][C:22](=[O:21])[N:2]([C:4]3[CH:12]=[CH:11][CH:10]=[CH:9][C:5]=3[C:6]([OH:8])=[O:7])[N:3]=2)[CH:44]=[CH:43][C:42]=1[O:45][CH3:46]

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 8471TriethylamineHCID 104169Benzoic acid, 2-hydrazinyl-, hydrochloride (1:1)HCID 72312776[2-(3,4-Dimethoxyphenyl)-2-[4-(5-methyl-[1,2,4]oxadiazol-3-yl)phenylimino]-1-methylsulfanylethylidene]carbamic acid methyl ester

Product 1

HCID 1361737382-(3-{(3,4-Dimethoxyphenyl)-[4-(5-methyl-[1,2,4]oxadiazol-3-yl)phenylimino]methyl}-5-oxo-4,5-dihydro-[1,2,4]triazol-1-yl)benzoic acidYield 32.3%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
90 °C

Procedure

After adding 38 mg of 2-hydrazinobenzoic acid hydrochloride and 0.056 ml of triethylamine to a solution of 91 mg of [2-(3,4-dimethoxyphenyl)-2-[4-(5-methyl-[1,2,4]oxadiazol-3-yl)phenylimino]-1-methylsulfanylethylidene]carbamic acid methyl ester in 5 ml of DMF, the mixture was stirred at 90° C. for 20 hours under a nitrogen atmosphere. After cooling the reaction mixture to room temperature, 30 ml of water was added, hydrochloric acid was added (for adjustment to pH 3-4), and extraction was performed with 50 ml of ethyl acetate. The organic layer was washed twice with 30 ml of water and once with 30 ml of saturated brine, and then dried over anhydrous magnesium sulfate. The desiccating agent was filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by NAM silica gel column chromatography (methanol-dichloromethane) to give the title compound (34 mg) as a light yellow solid.

Workup

  1. temperatureAfter cooling the reaction mixture to room temperature
  2. extraction(for adjustment to pH 3-4), and extraction
  3. washThe organic layer was washed twice with 30 ml of water and once with 30 ml of saturated brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. filtrationThe desiccating agent was filtered
  6. concentrationthe filtrate was concentrated under reduced pressure
  7. customThe residue was purified by NAM silica gel column chromatography (methanol-dichloromethane)

Sources & evidence

ORD record
ord-43f3ffb9c3d048b99365892b667d29a2
Source dataset
uspto-grants-2010_10
Patent number
US07816522B2

Reaction notes

Loading…