Cesium carbonate → 5-[(2-Aminopyridin-4-yl)oxy]-6-ethyl-3-{[4-(4-methylpiperazin-1-yl)phenyl]amino}pyrazine-2-carboxamide

HRID 1526249Notes

Reaction equation

Cl[C:2]1[N:3]=[C:4]([NH:13][C:14]2[CH:19]=[CH:18][C:17]([N:20]3[CH2:25][CH2:24][N:23]([CH3:26])[CH2:22][CH2:21]3)=[CH:16][CH:15]=2)[C:5]([C:10]([NH2:12])=[O:11])=[N:6][C:7]=1[CH2:8][CH3:9].[NH2:27][C:28]1[CH:33]=[C:32]([OH:34])[CH:31]=[CH:30][N:29]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>CN1CCCC1=O>[NH2:27][C:28]1[CH:33]=[C:32]([O:34][C:2]2[N:3]=[C:4]([NH:13][C:14]3[CH:19]=[CH:18][C:17]([N:20]4[CH2:25][CH2:24][N:23]([CH3:26])[CH2:22][CH2:21]4)=[CH:16][CH:15]=3)[C:5]([C:10]([NH2:12])=[O:11])=[N:6][C:7]=2[CH2:8][CH3:9])[CH:31]=[CH:30][N:29]=1

Participants

Conditions

Temperature: 120 °C

Procedure

A mixture of 5-chloro-6-ethyl-3-{[4-(4-methylpiperazin-1-yl)phenyl]amino}pyrazine-2-carboxamide (200 mg), 2-amino-4-pyridinol (118 mg), cesium carbonate (348 mg), and N-methylpyrrolidone (2 mL) was stirred at 120° C. for 3 hours. The reactant was purified by silica gel column chromatography (eluent; chloroform:methanol=95:5-80:20, NH2 type: eluent; chloroform:methanol=99:1-98:2) and then washed with ethyl acetate to obtain 5-[(2-aminopyridin-4-yl)oxy]-6-ethyl-3-{[4-(4-methylpiperazin-1-yl)phenyl]amino}pyrazine-2-carboxamide (104 mg) as a yellow solid.

Workup

customThe reactant was purified by silica gel column chromatography (eluent; chloroform:methanol=95:5-80:20, NH2 type: eluent; chloroform:methanol=99:1-98:2)
washwashed with ethyl acetate

Sources & evidence

ORD record: ord-d7aa892e63a5464188b5f9429508334d
Source dataset: uspto-grants-2015_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09085540B2

Reaction notes

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