1-(chloromethyl)-2-methylsulfanylbenzene

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

Procedure: By reacting thiosalicylic acid with dimethyl sulfate in the presence of tetrabutylammonium bromide, there was obtained methyl 2-(methylthio)benzoate, melting point 64° C. Reduction with lithium aluminum hydride in dry tetrahydrofuran yielded 2-(methylthio)benzyl alcohol which was converted by reaction with SOCl2 into 2-(methylthio)benzyl chloride, boiling point 90° C./0.3 Torr. Reaction of diethyl malonate with 2-(methylthio)benzyl chloride yielded diethyl 2-(methylthio)benzyl-malonate, boiling point 130° C./0.05 Torr. Condensation with formamidine yielded 5-[o-(methylthio)benzyl]-6-hydroxy-4(3H)-pyrimidinone which was converted into 4,6-dichloro-5-[o-(methylthio)benzyl]pyrimidine, melting point 91° C. From 4,6-dichloro-5-(o-(methylthio)benzyl)pyrimidine and p-isopropylbenzenesulfonamide potassium, there was finally obtained N-[6-chloro-5-(o-(methylthio)benzyl)-4-pyrimidinyl]-p-isopropylbenzenesulfonamide, melting point 145°-146° C.

Conditions: temp:-70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2-Methylthiophenylmethylmagnesium chloride was prepared from magnesium turnings (654 mg) and 2-(chloromethyl)thioanisole (1.55 g) in ether (29 ml) by the method of J. Am. Chem. Soc. (1943) 65, 295. A solution of lithium chloride (38 mg) and copper(II) chloride (60 mg) in THF (2.8 ml) was added dropwise to the ethereal solution of the Grignard reagent followed by addition of a solution of (2RS,3S)-3-(benzyloxy)-1,2-epoxybutane (0.8 g) in ether (8 ml) below −60° C. The mixture was stirred at −70° C. for 1 h, and then allowed to warm to room temperature and stirred overnight. After cooling, the mixture was quenched with saturated aqueous ammonium chloride solution (22 ml). The organic layer was washed with brine, dried over anhydrous magnesium sulfate and concentrated in vacuo to give an oil. Column chromatography (CH2Cl2) over silica gel gave a pale brown oil of (2S,3S)-2-benzyloxy-5-(2-(methylthio)phenyl)pentan-3-ol (0.65 g, 45.8%). to warm to room temperature stirred overnight After cooling the mixture was quenched with saturated aqueous ammonium chloride solution (22 ml) The organic layer was washed with brine dried over anhydrous magnesium sulfate concentrated in vacuo to give an oil

Conditions: temp:-70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2-Methylthiophenylmethylmagnesium chloride was prepared from magnesium turnings (654 mg) and 2-(chloromethyl)thioanisole (1.55 g) in ether (29 ml) by the method of J. Am. Chem. Soc. (1943) 65, 295. A solution of lithium chloride (38 mg) and copper(II) chloride (60 mg) in THF (2.8 ml) was added dropwise to the ethereal solution of the Grignard reagent followed by addition of a solution of (2RS,3S)-3-(benzyloxy)-1,2-epoxybutane (0.8 g) in ether (8 ml) below −60° C. The mixture was stirred at −70° C. for 1 h, and then allowed to warm to room temperature and stirred overnight. After cooling, the mixture was quenched with saturated aqueous ammonium chloride solution (22 ml). The organic layer was washed with brine, dried over anhydrous magnesium sulfate and concentrated in vacuo to give an oil. Column chromatography (CH2Cl2) over silica gel gave a pale brown oil of (2S,3S)-2-benzyloxy-5-(2-(methylthio)phenyl)pentan-3-ol (0.65 g, 45.8%). to warm to room temperature stirred overnight After cooling the mixture was quenched with saturated aqueous ammonium chloride solution (22 ml) The organic layer was washed with brine dried over anhydrous magnesium sulfate concentrated in vacuo to give an oil

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

Procedure: Combine 1-methylsulfanyl-2-chloromethyl-benzene (3.7 g, 23 mmol), iron (−130 mg, 2.3 mmol), bromine (1.2 mL, 238 mmol), and dichloromethane (150 mL). Stir for 2 hours. Add water (10 mL), aqueous saturated sodium thiosulfate (100 mL) and ethyl acetate (100 mL). Separate the organic layer and wash with brine, dry with MgSO4, filter and concentrate in vacuo. Chromatograph the residue on a SiO2 column eluting with hexane to give 4.8 g of 4-bromo-2-chloro-1-methylsulfanyl-benzene (87%). Separate the organic layer wash with brine dry with MgSO4 filter concentrate in vacuo Chromatograph the residue on a SiO2 column eluting with hexane

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

Procedure: Combine 1-methylsulfanyl-2-chloromethyl-benzene (3.7 g, 23 mmol), iron (130 mg, 2.3 mmol), bromine (1.2 mL, 238 mmol), and dichloromethane (150 mL). Stir for 2 hours. Add water (10 mL), aqueous saturated sodium thiosulfate (100 mL) and ethyl acetate (100 mL). Separate the organic layer and wash with brine, dry with MgSO4, filter and concentrate in vacuo. Chromatograph the residue on a SiO2 column eluting with hexane to give 4.8 g of 4-bromo-2-chloro-1-methylsulfanyl-benzene (87%). Separate the organic layer wash with brine dry with MgSO4 filter concentrate in vacuo Chromatograph the residue on a SiO2 column eluting with hexane

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

Procedure: Combine 1-methylsulfanyl-2-chloromethyl-benzene (3.7 g, 23 mmol), iron (130 mg, 2.3 mmol), bromine (1.2 mL, 238 mmol), and dichloromethane (150 mL). Stir for 2 hours. Add water (10 mL), aqueous saturated sodium thiosulfate (100 mL) and ethyl acetate (100 mL). Separate the organic layer and wash with brine, dry with MgSO4, filter and concentrate in vacuo. Chromatograph the residue on a SiO2 column eluting with hexane to give 4.8 g of 4-bromo-2-chloro-1-methylsulfanyl-benzene (87%). Separate the organic layer wash with brine dry with MgSO4 filter concentrate in vacuo Chromatograph the residue on a SiO2 column eluting with hexane

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

Procedure: By reacting thiosalicylic acid with dimethyl sulfate in the presence of tetrabutylammonium bromide, there was obtained methyl 2-(methylthio)benzoate, melting point 64° C. Reduction with lithium aluminum hydride in dry tetrahydrofuran yielded 2-(methylthio)benzyl alcohol which was converted by reaction with SOCl2 into 2-(methylthio)benzyl chloride, boiling point 90° C./0.3 Torr. Reaction of diethyl malonate with 2-(methylthio)benzyl chloride yielded diethyl 2-(methylthio)benzyl-malonate, boiling point 130° C./0.05 Torr. Condensation with formamidine yielded 5-[o-(methylthio)benzyl]-6-hydroxy-4(3H)-pyrimidinone which was converted into 4,6-dichloro-5-[o-(methylthio)benzyl]pyrimidine, melting point 91° C. From 4,6-dichloro-5-(o-(methylthio)benzyl)pyrimidine and p-isopropylbenzenesulfonamide potassium, there was finally obtained N-[6-chloro-5-(o-(methylthio)benzyl)-4-pyrimidinyl]-p-isopropylbenzenesulfonamide, melting point 145°-146° C.

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

Procedure: By reacting thiosalicylic acid with dimethyl sulfate in the presence of tetrabutylammonium bromide, there was obtained methyl 2-(methylthio)benzoate, melting point 64° C. Reduction with lithium aluminum hydride in dry tetrahydrofuran yielded 2-(methylthio)benzyl alcohol which was converted by reaction with SOCl2 into 2-(methylthio)benzyl chloride, boiling point 90° C./0.3 Torr. Reaction of diethyl malonate with 2-(methylthio)benzyl chloride yielded diethyl 2-(methylthio)benzyl-malonate, boiling point 130° C./0.05 Torr. Condensation with formamidine yielded 5-[o-(methylthio)benzyl]-6-hydroxy-4(3H)-pyrimidinone which was converted into 4,6-dichloro-5-[o-(methylthio)benzyl]pyrimidine, melting point 91° C. From 4,6-dichloro-5-(o-(methylthio)benzyl)pyrimidine and p-isopropylbenzenesulfonamide potassium, there was finally obtained N-[6-chloro-5-(o-(methylthio)benzyl)-4-pyrimidinyl]-p-isopropylbenzenesulfonamide, melting point 145°-146° C.

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

Procedure: 2-Hydroxymethyl-1-methylthiobenzene (3.3 g, 21 mmol) is dissolved in 20 ml of absolute CH2Cl2 under an argon atmosphere. A solution of SOCl2 (2.6 g, 21 mmol) in 10 ml of absolute CH2Cl2 is added dropwise with stirring to this initial mixture in the course of 15 min, first under reflux, then at an internal temperature of 30° C. The reaction mixture is stirred under reflux for 2.25 h. The reaction mixture is concentrated and the oily crude product is purified by bulb tube distillation (7.9×10−2 mbar, 125-140° C.): colorless oil; yield: 3.3 g (88%). first under reflux at an internal temperature of 30° C under reflux for 2.25 h The reaction mixture is concentrated the oily crude product is purified by bulb tube distillation (7.9×10−2 mbar, 125-140° C.)

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

Procedure: In 20 ml of ethanol, 2.1 g (12.2 mmol.) of 2-methylthiobenzyl chloride, 2.17 g (12.3 mmol.) of methyl 1-piperazinecarbodithioate and 1.30 g (12.3 mmol.) of sodium carbonate were refluxed under heating for 2 hours. Ethanol was distilled off under reduced pressure. The residue was extracted with ether, after addition of water. The ether portion was washed with water and a saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate, and placed under reduced pressure to distill off the solvent. The residue was purified over silica gel column, to give 1.18 g of the desired compound as a yellow oil, yield 31%. under heating for 2 hours Ethanol was distilled off under reduced pressure The residue was extracted with ether after addition of water The ether portion was washed with water a saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate to distill off the solvent The residue was purified over silica gel column

Conditions: temp:-70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 2-Methylthiophenylmethylmagnesium chloride was prepared from magnesium turnings (654 mg) and 2-(chloromethyl)thioanisole (1.55 g) in ether (29 ml) by the method of J. Am. Chem. Soc. (1943) 65, 295. A solution of lithium chloride (38 mg) and copper(II) chloride (60 mg) in THF (2.8 ml) was added dropwise to the ethereal solution of the Grignard reagent followed by addition of a solution of (2RS,3S)-3-(benzyloxy)-1,2-epoxybutane (0.8 g) in ether (8 ml) below −60° C. The mixture was stirred at −70° C. for 1 h, and then allowed to warm to room temperature and stirred overnight. After cooling, the mixture was quenched with saturated aqueous ammonium chloride solution (22 ml). The organic layer was washed with brine, dried over anhydrous magnesium sulfate and concentrated in vacuo to give an oil. Column chromatography (CH2Cl2) over silica gel gave a pale brown oil of (2S,3S)-2-benzyloxy-5-(2-(methylthio)phenyl)pentan-3-ol (0.65 g, 45.8%). to warm to room temperature stirred overnight After cooling the mixture was quenched with saturated aqueous ammonium chloride solution (22 ml) The organic layer was washed with brine dried over anhydrous magnesium sulfate concentrated in vacuo to give an oil

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

Procedure: Combine 1-methylsulfanyl-2-chloromethyl-benzene (3.7 g, 23 mmol), iron (−130 mg, 2.3 mmol), bromine (1.2 mL, 238 mmol), and dichloromethane (150 mL). Stir for 2 hours. Add water (10 mL), aqueous saturated sodium thiosulfate (100 mL) and ethyl acetate (100 mL). Separate the organic layer and wash with brine, dry with MgSO4, filter and concentrate in vacuo. Chromatograph the residue on a SiO2 column eluting with hexane to give 4.8 g of 4-bromo-2-chloro-1-methylsulfanyl-benzene (87%). Separate the organic layer wash with brine dry with MgSO4 filter concentrate in vacuo Chromatograph the residue on a SiO2 column eluting with hexane