Cyclopentylamine → 4-Cyclopentylamino-6-fluoro-8-methoxy-quinoline-3-carboxylic acid ethyl ester
Reaction equation
[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[N:8][C:9]2[C:14]([C:15]=1Cl)=[CH:13][C:12]([F:17])=[CH:11][C:10]=2[O:18][CH3:19])=[O:5])[CH3:2].[CH:20]1([NH2:25])[CH2:24][CH2:23][CH2:22][CH2:21]1>>[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[N:8][C:9]2[C:14]([C:15]=1[NH:25][CH:20]1[CH2:24][CH2:23][CH2:22][CH2:21]1)=[CH:13][C:12]([F:17])=[CH:11][C:10]=2[O:18][CH3:19])=[O:5])[CH3:2]Participants
3
Procedure
4-Chloro-6-fluoro-8-methoxy-quinoline-3-carboxylic acid ethyl ester (250 mg, 0.89 mmol) was treated with cyclopentylamine following general procedure B to afford 4-cyclopentylamino-6-fluoro-8-methoxy-quinoline-3-carboxylic acid ethyl ester (200 mg). Thus obtained amino-ester was hydrolyzed to the corresponding acid in quantitative yield using general procedure D and then transformed into the corresponding ethylamide (140 mg) following general procedure E. The above ethylamide (0.42 mmol) was subjected to reaction with methyl chloroformate according to general procedure F to furnish 1-cyclopentyl-3-ethyl-9-fluoro-7-methoxy-1H-pyrimido[5,4-c]quinoline-2,4-dione (13 mg). LCMS: m/z 358 [M+1]+.
Sources & evidence
- ORD record
- ord-27cd227a66b24061863506685098ca71
- Source dataset
- uspto-grants-2015_10
- Patent number
- US09163022B2
Reaction notes
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