[CH3:1][N:2]1[CH2:7][CH2:6][N:5]([C:8]2[CH:13]=[CH:12][C:11]([N+:14]([O-])=O)=[C:10]([O:17][CH:18]([CH3:20])[CH3:19])[N:9]=2)[CH2:4][CH2:3]1.C([O-])=O.[NH4+]>[Pd].CO>[CH3:1][N:2]1[CH2:7][CH2:6][N:5]([C:8]2[N:9]=[C:10]([O:17][CH:18]([CH3:19])[CH3:20])[C:11]([NH2:14])=[CH:12][CH:13]=2)[CH2:4][CH2:3]1In a microwave tube, 500 mg of 1-methyl-4-[5-nitro-6-(propan-2-yloxy)pyridin-2-yl]piperazine are introduced into 15 ml of methanol. 675 mg of ammonium formate and 270 mg of Pd/C (10%) are added. The reaction medium is microwave-heated at 80° C. for 5 minutes. The mixture is filtered on Clarcel and the Clarcel is rinsed with methanol. The filtrate is concentrated under reduced pressure, so as to give 512 mg of 6-(4-methylpiperazin-1-yl)-2-(propan-2-yloxy)pyridin-3-amine in the form of a purple gum.
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