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Hydrochloric Acid → 4-[4-(6-Choroquinoxalin-2-yloxy)-2-ethylphenyl]-2,2,6,6-tetramethylpyran-3,5-dione

HRID 512581
Notes
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Reaction equation

HRID 512581 reaction equation
[CH2:1]([C:3]1[CH:8]=[C:7]([OH:9])[CH:6]=[CH:5][C:4]=1[CH:10]1[C:15](=[O:16])[C:14]([CH3:18])([CH3:17])[O:13][C:12]([CH3:20])([CH3:19])[C:11]1=[O:21])[CH3:2].Cl[C:23]1[CH:32]=[N:31][C:30]2[C:25](=[CH:26][CH:27]=[C:28]([Cl:33])[CH:29]=2)[N:24]=1.C(=O)([O-])[O-].[K+].[K+].Cl>CN(C)C=O.ClCCl>[Cl:33][C:28]1[CH:29]=[C:30]2[C:25](=[CH:26][CH:27]=1)[N:24]=[C:23]([O:9][C:7]1[CH:6]=[CH:5][C:4]([CH:10]3[C:15](=[O:16])[C:14]([CH3:18])([CH3:17])[O:13][C:12]([CH3:20])([CH3:19])[C:11]3=[O:21])=[C:3]([CH2:1][CH3:2])[CH:8]=1)[CH:32]=[N:31]2
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 11430Potassium CarbonateHCID 877482,6-DichloroquinoxalineHCID 666775534-(2-Ethyl-4-hydroxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione

Product 1

HCID 666776634-[4-(6-Choroquinoxalin-2-yloxy)-2-ethylphenyl]-2,2,6,6-tetramethylpyran-3,5-dione

Reagents, catalysts & solvents 2

HCID 6228
Dimethylformamide
Solvent
HCID 6344DichloromethaneSolvent

Conditions

Temperature
140 °C

Procedure

4-(2-Ethyl-4-hydroxyphenyl)-2,2,6,6-tetramethylpyran-3,5-dione (0.100 g, 0.34 mmol) is added to a mixture of 2,6-dichloroquinoxaline (0.081 g, 0.41 mmol) and potassium carbonate (0.110 g, 0.69 mmol) in N,N-dimethylformamide (3 ml), and the mixture is heated at 140° C. under microwave irradiation for 40 minutes. The mixture is cooled to room temperature, then acidified by addition of 2M aqueous hydrochloric acid. The mixture is diluted with dichloromethane and passed through a phase separation cartridge. The organic phase is concentrated to around 2 ml, and purified by preparative reverse phase HPLC to give 4-[4-(6-choroquinoxalin-2-yloxy)-2-ethylphenyl]-2,2,6,6-tetramethylpyran-3,5-dione.

Workup

  1. temperatureThe mixture is cooled to room temperature
  2. custompassed through a phase separation cartridge
  3. concentrationThe organic phase is concentrated to around 2 ml
  4. custompurified by preparative reverse phase HPLC

Sources & evidence

ORD record
ord-75f355bd9e814310a9340f5d78597102
Source dataset
uspto-grants-2015_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09102642B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes