Water → 4-[4-(2,4-difluorophenyl)-1,3-thiazol-2-yl]-N-pyridazin-3-ylpiperazine-1-carboxamide

HRID 2263294

Reaction equation

[N:1]1[CH:6]=[CH:5][CH:4]=[C:3]([NH:7][C:8](=[O:15])OCC(Cl)(Cl)Cl)[N:2]=1.[F:16][C:17]1[CH:22]=[C:21]([F:23])[CH:20]=[CH:19][C:18]=1[C:24]1[N:25]=[C:26]([N:29]2[CH2:34][CH2:33][NH:32][CH2:31][CH2:30]2)[S:27][CH:28]=1.C(N(C(C)C)CC)(C)C.O>CS(C)=O>[F:16][C:17]1[CH:22]=[C:21]([F:23])[CH:20]=[CH:19][C:18]=1[C:24]1[N:25]=[C:26]([N:29]2[CH2:30][CH2:31][N:32]([C:8]([NH:7][C:3]3[N:2]=[N:1][CH:6]=[CH:5][CH:4]=3)=[O:15])[CH2:33][CH2:34]2)[S:27][CH:28]=1

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of 2,2,2-trichloroethyl pyridazin-3-ylcarbamate (212 mg, 0.782 mmol), 1-[4-(2,4-difluorophenyl)-1,3-thiazol-2-yl]piperazine (200 mg, 0.711 mmol) and diisopropylethylamine (0.248 ml, 1.42 mmol) in dimethyl sulfoxide (2.5 ml) was stirred at 70° C. for 3 days. Water was poured to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with water, and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate), and recrystallized from a mixed solvent of hexane and tetrahydrofuran to give 136 mg (47.4%) of the desired product as a solid.

Workup

extractionthe mixture was extracted with ethyl acetate
washThe extract was washed with water
dry with materialdried over anhydrous magnesium sulfate
distillationthe solvent was distilled off under reduced pressure
customThe residue was purified by silica gel column chromatography (ethyl acetate)
customrecrystallized from a mixed solvent of hexane and tetrahydrofuran

Sources & evidence

ORD record: ord-a63d64f1c70349f7a437e363b86e3921
Source dataset: uspto-grants-2010_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07851473B2

Linked notes

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