Water → N-imidazo[1,2-b]pyridazin-6-yl-4-(3-phenyl-1,2,4-thiadiazol-5-yl)piperazine-1-carboxamide

HRID 2263157Notes

Reaction equation

[N:1]1[CH:2]=[CH:3][N:4]2[C:9]=1[CH:8]=[CH:7][C:6]([N:10]([C:19]([O:21]CC(Cl)(Cl)Cl)=O)C(OCC(Cl)(Cl)Cl)=O)=[N:5]2.[C:27]1([C:33]2[N:37]=[C:36]([N:38]3[CH2:43][CH2:42][NH:41][CH2:40][CH2:39]3)[S:35][N:34]=2)[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1.C(N(C(C)C)CC)(C)C.O>CS(C)=O>[N:1]1[CH:2]=[CH:3][N:4]2[C:9]=1[CH:8]=[CH:7][C:6]([NH:10][C:19]([N:41]1[CH2:42][CH2:43][N:38]([C:36]3[S:35][N:34]=[C:33]([C:27]4[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=4)[N:37]=3)[CH2:39][CH2:40]1)=[O:21])=[N:5]2

Participants

Conditions

Temperature: 70 °C

Procedure

A mixture of bis(2,2,2-trichloroethyl) imidazo[1,2-b]pyridazin-6-ylimidodicarbonate (295 mg, 0.609 mmol), 1-(3-phenyl-1,2,4-thiadiazol-5-yl)piperazine (300 mg, 1.22 mmol) and diisopropylethylamine (0.106 ml, 0.609 mmol) in dimethylsulfoxide (2.0 ml) was stirred at 70° C. for 4 hours. Water was poured into the reaction solution, 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 212 mg (85.7%) 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-67a8e63431db432dbc63bab2da1d51c0
Source dataset: uspto-grants-2010_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07851473B2

Reaction notes

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