C(N(CC)CC)C.Cl.CN(C)C.[CH3:13][C:14]1[CH:19]=[CH:18][C:17]([S:20](Cl)(=[O:22])=[O:21])=[CH:16][CH:15]=1.[Cl:24][C:25]1[CH:30]=[C:29](/[C:31](/[C:38]2[CH:43]=[CH:42][C:41]([CH2:44][CH3:45])=[C:40]([O:46][CH3:47])[N:39]=2)=[CH:32]\[CH:33]2[CH2:37][CH2:36][CH2:35][CH2:34]2)[CH:28]=[CH:27][C:26]=1[S:48][CH2:49][CH2:50][CH2:51][OH:52]>C(Cl)(Cl)Cl.O>[CH3:13][C:14]1[CH:19]=[CH:18][C:17]([S:20]([O:52][CH2:51][CH2:50][CH2:49][S:48][C:26]2[CH:27]=[CH:28][C:29](/[C:31](/[C:38]3[CH:43]=[CH:42][C:41]([CH2:44][CH3:45])=[C:40]([O:46][CH3:47])[N:39]=3)=[CH:32]\[CH:33]3[CH2:37][CH2:36][CH2:35][CH2:34]3)=[CH:30][C:25]=2[Cl:24])(=[O:22])=[O:21])=[CH:16][CH:15]=1Triethylamine (87 μL), trimethylamine hydrochloride (20 mg) and 4-methylbenzenesulfonyl chloride (60 mg) were sequentially added to a solution of 3-({2-chloro-4-[(E)-2-cyclopentyl-1-(5-ethyl-6-methoxypyridin-2-yl)ethenyl]phenyl}sulfanyl)propan-1-ol (95 mg) in chloroform (2 mL) under ice-cooling, and the mixture was stirred at room temperature for one hour. The reaction solution was poured into water, followed by extraction with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and filtered, after which the solvent was evaporated under reduced pressure to give 3-({2-chloro-4-[(E)-2-cyclopentyl-1-(5-ethyl-6-methoxypyridin-2-yl)ethenyl]phenyl}sulfanyl)propyl 4-methylbenzenesulfonate (120 mg) as a yellow amorphous.
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