N-[bis(methylsulfanyl)methylidene]-4-chlorobenzenesulfonamide

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Part A: A stirred mixture of 3-(4-chlorophenyl)-4,5-dihydro-4-phenyl-1H-pyrazole (12.0 gram, 46.8 mmol), [(4-chlorophenyl)sulfonyl]dithioimidocarbonic acid dimethyl ester (CAS: 13068-12-7) (9.20 gram, 31.1 mmol) and triethylamine (15 ml) in acetonitrile (200 ml) was heated at reflux temperature for 20 hours. An additional portion of 3-(4-chlorophenyl)-4,5-dihydro-4-phenyl-1H-pyrazole (12.0 gram, 46.8 mmol) was added and the resulting mixture was heated at reflux temperature for another 16 hours. After concentration in vacuo, dichloromethane was added and the resulting solution was washed twice with water and dried over anhydrous Na2SO4. After filtration and evaporation in vacuo the residue was further purified by flash chromatography (diethyl ether/petroleum ether=1/1 (v/v)) to give 3-(4-chlorophenyl)-N-((4-chlorophenyl)sulfonyl)-4,5-dihydro-4-phenyl-1H-pyrazole-1-carboximidothioic acid methyl ester (12.5 gram, 80% yield based on [(4-chlorophenyl)sulfonyl]dithioimidocarbonic acid dimethyl ester) as an amorphous solid. was heated at reflux temperature for 20 hours the resulting mixture was heated at reflux temperature for another 16 hours After concentration in vacuo, dichloromethane was added the resulting solution was washed twice with water dried over anhydrous Na2SO4 After filtration and evaporation in vacuo the residue was further purified by flash chromatography (diethyl ether/petroleum ether=1/1 (v/v))

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Part C: Crude 4-phenyl-3-(pyridin-3-yl)-4,5-dihydro-1H-pyrazole (9.81 g, 0.044 mol), [(4-chlorophenyl)sulfonyl]dithioimidocarbonic acid dimethyl ester (12.99 gram, 0.044 mol) and triethylamine (47 mL) are successively dissolved in acetonitrile. The resulting mixture is heated at reflux for 70 hours. The resulting mixture is allowed to attain room temperature and concentrated in vacuo. The residue is dissolved in dichloromethane. The organic layer is washed with water, dried over Na2SO4, filtered and concentrated in vacuo. Flash chromatographic purification (eluant: methanol/dichloromethane=5/95 (v/v)) gives N-((4-chlorophenyl)sulfonyl)-4-phenyl-3-(pyridin-3-yl)-4,5-dihydro-1H-pyrazole-1-carboximidothioic acid methyl ester (7.15 gram, 35% yield). ESI-MS (MH+) 471. The resulting mixture is heated at reflux for 70 hours to attain room temperature concentrated in vacuo The residue is dissolved in dichloromethane The organic layer is washed with water dried over Na2SO4 filtered concentrated in vacuo Flash chromatographic purification (eluant: methanol/dichloromethane=5/95 (v/v))

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Part C: Crude 4-phenyl-3-(pyridin-3-yl)-4,5-dihydro-1H-pyrazole (9.81 g, 0.044 mol), [(4-chlorophenyl)sulfonyl]dithioimidocarbonic acid dimethyl ester (12.99 gram, 0.044 mol) and triethylamine (47 mL) are successively dissolved in acetonitrile. The resulting mixture is heated at reflux for 70 hours. The resulting mixture is allowed to attain room temperature and concentrated in vacuo. The residue is dissolved in dichloromethane. The organic layer is washed with water, dried over Na2SO4, filtered and concentrated in vacuo. Flash chromatographic purification (eluant: methanol/dichloromethane=5/95 (v/v)) gives N-((4-chlorophenyl)sulfonyl)-4-phenyl-3-(pyridin-3-yl)-4,5-dihydro-1H-pyrazole-1-carboximidothioic acid methyl ester (7.15 gram, 35% yield). ESI-MS (MH+) 471. The resulting mixture is heated at reflux for 70 hours to attain room temperature concentrated in vacuo The residue is dissolved in dichloromethane The organic layer is washed with water dried over Na2SO4 filtered concentrated in vacuo Flash chromatographic purification (eluant: methanol/dichloromethane=5/95 (v/v))

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Part A: A stirred mixture of 3-(4-chlorophenyl)-4,5-dihydro-4-phenyl-1H-pyrazole (12.0 gram, 46.8 mmol), [(4-chlorophenyl)sulfonyl]dithioimidocarbonic acid dimethyl ester (CAS: 13068-12-7) (9.20 gram, 31.1 mmol) and triethylamine (15 ml) in acetonitrile (200 ml) was heated at reflux temperature for 20 hours. An additional portion of 3-(4-chlorophenyl)-4,5-dihydro-4-phenyl-1H-pyrazole (12.0 gram, 46.8 mmol) was added and the resulting mixture was heated at reflux temperature for another 16 hours. After concentration in vacuo, dichloromethane was added and the resulting solution was washed twice with water and dried over anhydrous Na2SO4. After filtration and evaporation in vacuo the residue was further purified by flash chromatography (diethyl ether/petroleum ether=1/1 (v/v)) to give 3-(4-chlorophenyl)-N-((4-chlorophenyl)sulfonyl)-4,5-dihydro-4-phenyl-1H-pyrazole-1-carboximidothioic acid methyl ester (12.5 gram, 80% yield based on [(4-chlorophenyl)sulfonyl]dithioimidocarbonic acid dimethyl ester) as an amorphous solid. was heated at reflux temperature for 20 hours the resulting mixture was heated at reflux temperature for another 16 hours After concentration in vacuo, dichloromethane was added the resulting solution was washed twice with water dried over anhydrous Na2SO4 After filtration and evaporation in vacuo the residue was further purified by flash chromatography (diethyl ether/petroleum ether=1/1 (v/v))

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Part C: Crude 4-phenyl-3-(pyridin-3-yl)-4,5-dihydro-1H-pyrazole (9.81 g, 0.044 mol), [(4-chlorophenyl)sulfonyl]dithioimidocarbonic acid dimethyl ester (12.99 gram, 0.044 mol) and triethylamine (47 mL) are successively dissolved in acetonitrile. The resulting mixture is heated at reflux for 70 hours. The resulting mixture is allowed to attain room temperature and concentrated in vacuo. The residue is dissolved in dichloromethane. The organic layer is washed with water, dried over Na2SO4, filtered and concentrated in vacuo. Flash chromatographic purification (eluant: methanol/dichloromethane=5/95 (v/v)) gives N-((4-chlorophenyl)sulfonyl)-4-phenyl-3-(pyridin-3-yl)-4,5-dihydro-1H-pyrazole-1-carboximidothioic acid methyl ester (7.15 gram, 35% yield). ESI-MS (MH+) 471. The resulting mixture is heated at reflux for 70 hours to attain room temperature concentrated in vacuo The residue is dissolved in dichloromethane The organic layer is washed with water dried over Na2SO4 filtered concentrated in vacuo Flash chromatographic purification (eluant: methanol/dichloromethane=5/95 (v/v))