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

HRID 2263044Notes

Reaction equation

HRID 2263044 reaction equation
[C:1]([NH:4][C:5]1[N:10]=[CH:9][C:8]([NH:11][C:12](=[O:19])OCC(Cl)(Cl)Cl)=[CH:7][CH:6]=1)(=[O:3])[CH3:2].[C:20]1([C:26]2[N:30]=[C:29]([N:31]3[CH2:36][CH2:35][NH:34][CH2:33][CH2:32]3)[S:28][N:27]=2)[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1.C(N(C(C)C)CC)(C)C.O>CS(C)=O>[C:1]([NH:4][C:5]1[N:10]=[CH:9][C:8]([NH:11][C:12]([N:34]2[CH2:35][CH2:36][N:31]([C:29]3[S:28][N:27]=[C:26]([C:20]4[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=4)[N:30]=3)[CH2:32][CH2:33]2)=[O:19])=[CH:7][CH:6]=1)(=[O:3])[CH3:2]

Participants

6

Reactant 4

HCID 962WaterHCID 81531DiisopropylethylamineHCID 27777601-(3-Phenyl-(1,2,4)thiadiazol-5-yl)-piperazineHCID 862452592,2,2-Trichloroethyl[6-(acetylamino)pyridin-3-yl]carbamate

Product 1

HCID 68776949N-[6-(Acetylamino)pyridin-3-yl]-4-(3-phenyl-1,2,4-thiadiazol-5-yl)piperazine-1-carboxamideYield 47.5%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Procedure

A mixed solution of 2,2,2-trichloroethyl [6-(acetylamino)pyridin-3-yl]carbamate (241 mg, 0.738 mmol), 1-(3-phenyl-1,2,4-thiadiazol-5-yl)piperazine (200 mg, 0.812 mmol) and diisopropylethylamine (0.129 ml, 0.738 mmol) in dimethyl sulfoxide (2.5 ml) was stirred at 70° C. for 15 hours. Water was poured to the reaction mixture, and the resulting solution 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 148 mg (47.5%) of the desired product as a solid.

Workup

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

Sources & evidence

ORD record
ord-ca0ff9ec77a84e86b5f76a3c1bf1a8ec
Source dataset
uspto-grants-2010_12
Patent number
US07851473B2

Reaction notes

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