Ammonium formate → (+/-)9-[6-(4-Methoxy-benzylamino)-pyridin-2-yl]-3-quinoxalin-2-yl nonanoic acid ethyl ester
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]Participants
5
Reactant 2
Product 1
Reagents, catalysts & solvents 2
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
- temperaturethe heterogeneous mixture was refluxed for 30 minutes
- temperaturethe mixture refluxed for an additional 30
- customminutes (reaction complete by ms)
- filtrationThe solution was then filtered through a Celite plug
- washwashed with EtOH (75 mL)
- concentrationconcentrated in vacuo
Sources & evidence
- ORD record
- ord-c5cac8891a554236a78ee494bd2d725a
- Source dataset
- uspto-grants-2006_12
- Patent number
- US07153862B2
Reaction notes
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