Ethanol → HCID 22724364, compound
Reaction equation
[C:1]([CH2:4][CH2:5][C:6]1[C:11](=[O:12])[N:10]([C:13]2[CH:18]=[CH:17][CH:16]=[C:15]([NH:19][C:20]([NH:22][C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][C:24]=3[O:29][CH3:30])=[O:21])[CH:14]=2)[C:9]2[N:31]=[CH:32][CH:33]=[CH:34][C:8]=2[N:7]=1)([OH:3])=[O:2].[CH2:35](O)[CH3:36]>>[CH2:35]([O:2][C:1]([CH2:4][CH2:5][C:6]1[C:11](=[O:12])[N:10]([C:13]2[CH:18]=[CH:17][CH:16]=[C:15]([NH:19][C:20]([NH:22][C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][C:24]=3[O:29][CH3:30])=[O:21])[CH:14]=2)[C:9]2[N:31]=[CH:32][CH:33]=[CH:34][C:8]=2[N:7]=1)=[O:3])[CH3:36]Participants
3
Procedure
To a suspension of 2-(2-carboxyethyl)-3-oxo-4-[3-[3-(2-methoxyphenyl)ureido]phenyl]-3,4-dihydropyrido[2,3-b]pyrazine (0.15 g) in ethanol (9 ml) was added conc. sulfonic acid (0.9 ml) and the mixture was refluxed for 30 minutes. After cooling, the reaction mixture was neutralized and ethanol was evaporated. Crystalline materials formed were collected, washed with water and dried to give 2-(2-ethoxycarbonylethyl)-3-oxo-4-[3-[3-(2-methoxyphenyl)-ureido]phenyl]-3,4-dihydropyrido[2,3-b]pyrazine (0.12 g).
Workup
- temperaturethe mixture was refluxed for 30 minutes
- temperatureAfter cooling
- customethanol was evaporated
- customCrystalline materials formed
- customwere collected
- washwashed with water
- customdried
Sources & evidence
- ORD record
- ord-0d1a5fc1268146179e98bdbd00e68b5c
- Source dataset
- uspto-grants-2004_04
- Patent number
- US06727245B2
Reaction notes
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