4-(4-Methylpiperazin-1-yl)aniline → HCID 57489605, compound

HRID 2044049Notes

Reaction equation

Cl[C:2]1[N:10]=[C:9]([Cl:11])[CH:8]=[CH:7][C:3]=1[C:4]([NH2:6])=[O:5].[CH3:12][N:13]1[CH2:18][CH2:17][N:16]([C:19]2[CH:25]=[CH:24][C:22]([NH2:23])=[CH:21][CH:20]=2)[CH2:15][CH2:14]1.C[Si]([N-][Si](C)(C)C)(C)C.[Li+]>C1COCC1.C(OCC)(=O)C>[Cl:11][C:9]1[CH:8]=[CH:7][C:3]([C:4]([NH2:6])=[O:5])=[C:2]([NH:23][C:22]2[CH:21]=[CH:20][C:19]([N:16]3[CH2:15][CH2:14][N:13]([CH3:12])[CH2:18][CH2:17]3)=[CH:25][CH:24]=2)[N:10]=1

Participants

Conditions

Temperature: -78 °C

Procedure

A solution of 2,6-dichloronicotinamide (100 mg, 0.524 mmol) and 4-(4-methylpiperazin-1-yl)aniline (300 mg, 1.571 mmol) in THF (5 mL) was cooled to −78° C. and treated with 1 M solution of lithium bis(trimethylsilyl)amide (3.14 mL, 3.14 mmol) in THF. The reaction mixture was stirred at −78° C. for 1 h and then at rt for 1 h. The reaction mixture was diluted with ethyl acetate, washed with water, and concentrated. The residue was purified by MPLC chromatography (ISCO, 5% NH4OH/MeOH/CH2Cl2, 40 g silica gel column) to give 131 mg of 6-chloro-2-(4-(4-methylpiperazin-1-yl)phenylamino)nicotinamide as a yellow solid. LCMS: (M+H)+=346.09, 348.05 (Cl pattern). 1H NMR (400 MHz, CDCl3-MIX) δ ppm 10.56 (1H, s), 7.59 (1H, d, J=7.91 Hz), 7.56 (2H, d, J=8.79 Hz), 6.93 (2H, d, J=9.23 Hz), 6.61 (1H, d, J=7.91 Hz), 5.76 (2H, br. s.), 3.16-3.21 (4H, m), 2.57-2.62 (4H, m), 2.36 (3 H, s).

Workup

waitat rt for 1 h
washwashed with water
concentrationconcentrated
customThe residue was purified by MPLC chromatography (ISCO, 5% NH4OH/MeOH/CH2Cl2, 40 g silica gel column)

Sources & evidence

ORD record: ord-af7f138391974d5a954ce0233a8c7f7a
Source dataset: uspto-grants-2013_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08586751B2

Reaction notes

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