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Hydrochloric Acid → 5-[(3-{[(1,1-Dimethylethyl)oxy]carbonyl}-2,3,4,5-tetrahydro-1H-3-benzazepin-7-yl)oxy]-2-pyrazinecarboxylic acid

HRID 1714917
Notes
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Reaction equation

HRID 1714917 reaction equation
[OH-].[Na+].C[O:4][C:5]([C:7]1[N:8]=[CH:9][C:10]([O:13][C:14]2[CH:31]=[CH:30][C:17]3[CH2:18][CH2:19][N:20]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[CH2:21][CH2:22][C:16]=3[CH:15]=2)=[N:11][CH:12]=1)=[O:6].Cl.O>CC(C)=O>[CH3:29][C:26]([O:25][C:23]([N:20]1[CH2:19][CH2:18][C:17]2[CH:30]=[CH:31][C:14]([O:13][C:10]3[N:11]=[CH:12][C:7]([C:5]([OH:6])=[O:4])=[N:8][CH:9]=3)=[CH:15][C:16]=2[CH2:22][CH2:21]1)=[O:24])([CH3:27])[CH3:28]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 14798Sodium HydroxideHCID 589845771,1-Dimethylethyl 7-({5-[(methyloxy)carbonyl]-2-pyrazinyl}oxy)-1,2,4,5-tetrahydro-3H-3-benzazepine-3-carboxylate

Product 1

HCID 574376215-[(3-{[(1,1-Dimethylethyl)oxy]carbonyl}-2,3,4,5-tetrahydro-1H-3-benzazepin-7-yl)oxy]-2-pyrazinecarboxylic acidYield 96.2%

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

2M Sodium hydroxide solution (110 ml) was added to a solution of 1,1-dimethylethyl 7-({5-[(methyloxy)carbonyl]-2-pyrazinyl}oxy)-1,2,4,5-tetrahydro-3H-3-benzazepine-3-carboxylate (D49, Step 1) (29.38 g, 73.6 mmol) in acetone (480 ml) and the resulting mixture was stirred at room temperature for 25 minutes. The mixture was acidified with 2M hydrochloric acid and then poured into water (2 L). The resulting white solid was collected by filtration, washed with water and dissolved in ethyl acetate (1 L). This solution was dried under sodium sulfate and evaporated in vacuo to give the title compound (27.3 g); MS (ES+) m/e 384 [M−H]+.

Workup

  1. filtrationThe resulting white solid was collected by filtration
  2. washwashed with water
  3. dissolutiondissolved in ethyl acetate (1 L)
  4. customThis solution was dried under sodium sulfate
  5. customevaporated in vacuo

Sources & evidence

ORD record
ord-b35c3b63975b497d85aa39de88278959
Source dataset
uspto-grants-2010_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07799773B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes