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Ammonium formate → (+/-)9-[6-(4-Methoxy-benzylamino)-pyridin-2-yl]-3-quinoxalin-2-yl nonanoic acid ethyl ester

HRID 860084
Notes
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Reaction equation

HRID 860084 reaction equation
[CH2:1]([O:3][C:4](=[O:39])[CH2:5][CH:6]([C:29]1[CH:38]=[N:37][C:36]2[C:31](=[CH:32][CH:33]=[CH:34][CH:35]=2)[N:30]=1)[CH:7]=[CH:8][CH2:9][CH2:10][CH2:11][CH2:12][C:13]1[CH:18]=[CH:17][CH:16]=[C:15]([NH:19][CH2:20][C:21]2[CH:26]=[CH:25][C:24]([O:27][CH3:28])=[CH:23][CH:22]=2)[N:14]=1)[CH3:2].C([O-])=O.[NH4+]>CCO.[Pd]>[CH2:1]([O:3][C:4](=[O:39])[CH2:5][CH:6]([C:29]1[CH:38]=[N:37][C:36]2[C:31](=[CH:32][CH:33]=[CH:34][CH:35]=2)[N:30]=1)[CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][C:13]1[CH:18]=[CH:17][CH:16]=[C:15]([NH:19][CH2:20][C:21]2[CH:22]=[CH:23][C:24]([O:27][CH3:28])=[CH:25][CH:26]=2)[N:14]=1)[CH3:2]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 2

HCID 2723923Ammonium formateHCID 69666596(+/-)9-[6-(4-Methoxy-benzylamino)-pyridin-2-yl]-3-quinoxalin-2-yl-non-4-enoic acid ethyl ester

Product 1

HCID 69882476(+/-)9-[6-(4-Methoxy-benzylamino)-pyridin-2-yl]-3-quinoxalin-2-yl nonanoic acid ethyl esterYield 92.1%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalyst2×
HCID 702
Ethanol
Solvent

Procedure

A solution of the 22-4 (0.141 g, 0.268 mmol) in 25 mL absolute EtOH was treated with 10% Pd—C (0.015 g, 10% by wt) at room temperature under an argon atmosphere. Then ammonium formate (0.101 g, 1.61 mmol) was added and the heterogeneous mixture was refluxed for 30 minutes. The reaction was >50% complete (by ms). At this point, more Pd—C (0.008 g, 5% by wt) and NH4CO2 (0.050 g, 0.80 mmol) were added and the mixture refluxed for an additional 30. minutes (reaction complete by ms). The solution was then filtered through a Celite plug, washed with EtOH (75 mL), and concentrated in vacuo to afford 0.130 g 22-5.

Workup

  1. temperaturethe heterogeneous mixture was refluxed for 30 minutes
  2. temperaturethe mixture refluxed for an additional 30
  3. customminutes (reaction complete by ms)
  4. filtrationThe solution was then filtered through a Celite plug
  5. washwashed with EtOH (75 mL)
  6. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-c5cac8891a554236a78ee494bd2d725a
Source dataset
uspto-grants-2006_12
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07153862B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes