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Hydrochloric Acid → 8-(2,6-Dichloro-3,5-dimethoxy-phenyl)-quinoxaline-5-carboxylic acid (1H-imidazol-2-yl)-amide

HRID 2409619
Notes
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Reaction equation

HRID 2409619 reaction equation
C[Si](C)(C)CCOC[N:7]1[CH:11]=[CH:10][N:9]=[C:8]1[NH:12][C:13]([C:15]1[C:16]2[N:17]=[CH:18][CH:19]=[N:20][C:21]=2[C:22]([C:25]2[C:30]([Cl:31])=[C:29]([O:32][CH3:33])[CH:28]=[C:27]([O:34][CH3:35])[C:26]=2[Cl:36])=[CH:23][CH:24]=1)=[O:14].Cl.C([O-])([O-])=O.[Na+].[Na+]>CCO>[NH:9]1[CH:10]=[CH:11][N:7]=[C:8]1[NH:12][C:13]([C:15]1[C:16]2[N:17]=[CH:18][CH:19]=[N:20][C:21]=2[C:22]([C:25]2[C:26]([Cl:36])=[C:27]([O:34][CH3:35])[CH:28]=[C:29]([O:32][CH3:33])[C:30]=2[Cl:31])=[CH:23][CH:24]=1)=[O:14]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 10340Sodium CarbonateHCID 866411408-(2,6-dichloro-3,5-dimethoxy-phenyl)-quinoxaline-5-carboxylic acid [1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-amide

Product 1

HCID 592928538-(2,6-Dichloro-3,5-dimethoxy-phenyl)-quinoxaline-5-carboxylic acid (1H-imidazol-2-yl)-amideYield 79.1%

Reagents, catalysts & solvents 1

HCID 702
Ethanol
Solvent

Conditions

Temperature
65 °C

Procedure

A mixture of 8-(2,6-dichloro-3,5-dimethoxy-phenyl)-quinoxaline-5-carboxylic acid [1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-amide (Step 14.1) (0.527 g, 0.82 mmol), 5 N HCl (7 mL), and EtOH (4 mL) was stirred at 65° C. for 10 h. The reaction mixture was allowed to cool to rt, basified by addition of a saturated aqueous solution of Na2CO3, and extracted with DCM. The combined organic phase was washed with H2O and brine, dried (Na2SO4), filtered and concentrated. The residue was purified by silica gel column chromatography (DCM/MeOH/NH3aq, 94:5:1) to afford 0.288 g of the title compound as a yellow solid: ESI-MS: 443.9/445.9 [M+H]+; tR=3.74 min (System 1); TLC: Rf=0.30 (DCM/MeOH/NH3aq, 94:5:1).

Workup

  1. temperatureto cool to rt
  2. extractionextracted with DCM
  3. washThe combined organic phase was washed with H2O and brine
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue was purified by silica gel column chromatography (DCM/MeOH/NH3aq, 94:5:1)

Sources & evidence

ORD record
ord-8231e92b2e224f3ea6ed6cd4d19784a7
Source dataset
uspto-grants-2014_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08815901B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes