1,1-dioxothiane-4-carbonyl chloride

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

Procedure: Potassium carboxylate and ethyl bromoacetate were added to a DMF solution of 4-methylaniline and heated while stirring. The reaction mixture was added with water and ethyl acetate. After the organic layer was separated, washed and dried, the solvent was evaporated under reduced pressure to obtain a crude product. The crude product was dissolved in methylene chloride, and pyridine, tetrahydro-2H-thiopyrane-4-carbonyl chloride 1,1-dioxide were added to the resulting solution and stirred. After the reaction solution was concentrated, 1M hydrochloric acid and chloroform were added. The organic layer separated was washed and dried and the solvent was evaporated under reduced pressure. The resulting crude product was purified with a silica gel column chromatography to obtain ethyl ([(1,1-dioxotetrahydro-2H-thiopyran-4-yl)carbonyl](4-methylphenyl)amino)acetate (colorless oily product). FAB-MS [(M+H)+]: 354. heated After the organic layer was separated washed dried the solvent was evaporated under reduced pressure to obtain a crude product stirred After the reaction solution was concentrated 1M hydrochloric acid and chloroform were added The organic layer separated was washed dried the solvent was evaporated under reduced pressure The resulting crude product was purified with a silica gel column chromatography

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

Procedure: Potassium carboxylate and ethyl bromoacetate were added to a DMF solution of 4-methylaniline and heated while stirring. The reaction mixture was added with water and ethyl acetate. After the organic layer was separated, washed and dried, the solvent was evaporated under reduced pressure to obtain a crude product. The crude product was dissolved in methylene chloride, and pyridine, tetrahydro-2H-thiopyrane-4-carbonyl chloride 1,1-dioxide were added to the resulting solution and stirred. After the reaction solution was concentrated, 1M hydrochloric acid and chloroform were added. The organic layer separated was washed and dried and the solvent was evaporated under reduced pressure. The resulting crude product was purified with a silica gel column chromatography to obtain ethyl ([(1,1-dioxotetrahydro-2H-thiopyran-4-yl)carbonyl](4-methylphenyl)amino)acetate (colorless oily product). FAB-MS [(M+H)+]: 354. heated After the organic layer was separated washed dried the solvent was evaporated under reduced pressure to obtain a crude product stirred After the reaction solution was concentrated 1M hydrochloric acid and chloroform were added The organic layer separated was washed dried the solvent was evaporated under reduced pressure The resulting crude product was purified with a silica gel column chromatography