Isobutyric Acid → HCID 13958454, compound
Reaction equation
[NH2:1][C:2]1[CH:3]=[N:4][C:5]2[C:10]([C:11]=1[NH:12][CH3:13])=[CH:9][CH:8]=[CH:7][CH:6]=2.[C:14](O)(=O)[CH:15]([CH3:17])[CH3:16]>>[CH:15]([C:14]1[N:12]([CH3:13])[C:11]2[C:10]3[CH:9]=[CH:8][CH:7]=[CH:6][C:5]=3[N:4]=[CH:3][C:2]=2[N:1]=1)([CH3:17])[CH3:16]Participants
Procedure
Using the method of Example 147, 3-amino-4(methylamino)quinoline (the hydrochloride salt of which having been obtained in Exmple 27) was reacted with isobutyric acid to provide 2-isopropyl-1-methyl-1H-imidazo[4,5-c]quinoline. The crude product was dissolved in ethyl acetate and an excess of concentrated hydrochloric acid was added. The precipitate was separated by filtration and recrystallized from ethanol to provide 2-isopropyl-1-methyl-1H-imidazo[4,5-c]quinoline hydrochloride, m.p. 260°-263° C. This salt was suspended in water and the mixture was basified (pH 8-10) with 50% aqueous sodium hydroxide. The solid was separated by filtration, washed with water and recrystallized from hexane to provide the free base as the hydrate, m.p. 76°-81° C. Analysis: Calculated for C14H15N3.0.25H2O: %C, 73.2; %H, 6.8; %N, 18.3; Found: %C, 73.0 %H, 7.0; %N, 18.4.
Workup
- customhaving been obtained in Exmple 27)
Sources & evidence
- ORD record
- ord-d5056dda84b0444b890dd819b00fc5f4
- Source dataset
- uspto-grants-1987_10
- Patent number
- US04698348
Reaction notes
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