Acetic Acid → methyl 2-methyl-5-morpholino-3H-imidazo[4,5-b]pyridine-7-carboxylate
Reaktionsgleichung
[NH2:1][C:2]1[C:3]([NH2:18])=[C:4]([CH:9]=[C:10]([N:12]2[CH2:17][CH2:16][O:15][CH2:14][CH2:13]2)[N:11]=1)[C:5]([O:7][CH3:8])=[O:6].[CH3:19][C:20](O)=O>>[CH3:19][C:20]1[NH:1][C:2]2=[N:11][C:10]([N:12]3[CH2:17][CH2:16][O:15][CH2:14][CH2:13]3)=[CH:9][C:4]([C:5]([O:7][CH3:8])=[O:6])=[C:3]2[N:18]=1Komponenten
3
Versuchsvorschrift
A solution of methyl 2,3-diamino-6-morpholinoisonicotinate (4.3 g, 17 mmol) in CH3COOH (100 mL) was refluxed for 16 h. LCMS showed no methyl 2,3-diamino-6-morpholinoisonicotinate left and the desired product formed. It was cooled to room temperature and the solvent was removed in vacuo. The residue was then purified by chromatography on silica gel eluted with MeOH/DCM=1/50 to afford the desired product as a black solid (1.07 g, 23%); LC/MS: MS (ES+) m/e 277 (MH+); 1H NMR (300 MHz, CDCl3) δ ppm 2.69 (s, 3H), 3.58 (t, J=4.8 Hz, 4H), 3.86 (t, J=4.8 Hz, 4H), 4.02 (s, 3H), 7.12 (s, 1H).
Aufarbeitung
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