反应详情

Triethylamine (148 μL), trimethylamine hydrochloride (50 mg) and 4-methylbenzenesulfonyl chloride (74 mg) were sequentially added to a solution of 6-[(E)-1-{3-chloro-4-[(3-hydroxypropyl)sulfanyl]phenyl}-2-cyclopentylethenyl]-3-methylpyridin-2(1H)-one obtained in Example 1-22 (143 mg) in chloroform (5 mL) under ice-cooling, and the mixture was stirred at room temperature for one hour. Water and N,N-dimethylethylenediamine were added to the reaction solution, followed by extraction with chloroform. The organic layer was sequentially washed with 1 M hydrochloric acid and brine, dried over anhydrous magnesium sulfate and filtered. The solvent was then evaporated under reduced pressure. The residue was purified by silica gel chromatography (hexane:ethyl acetate=9:1→1:1) to give 3-({2-chloro-4-[(E)-2-cyclopentyl-1-(5-methyl-6-oxo-1,6-dihydropyridin-2-yl)ethenyl]phenyl}sulfanyl)propyl 4-methylbenzenesulfonate (33 mg, 18%) as a colorless amorphous.

1. temperaturecooling
2. extractionfollowed by extraction with chloroform
3. washThe organic layer was sequentially washed with 1 M hydrochloric acid and brine
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationfiltered
6. customThe solvent was then evaporated under reduced pressure
7. customThe residue was purified by silica gel chromatography (hexane:ethyl acetate=9:1→1:1)