2-(7-Chloroquinolin-2-yl)methoxy-11-hydroxy-6,11-dihydrodibenz[b,e]oxepine → 11-Acetylthio-2-(7-chloroquinolin-2-yl)methoxy-6,11-dihydrodibenz[b,e]oxepine

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Reaction Steps

Under ice cooling and stirring, 1.25 ml of thioacetic acid was added to 7.03 g of 2-(7-chloroquinolin-2-yl)methoxy-11-hydroxy-6,11-dihydrodibenz[b,e]oxepine obtained in Reference example 36 dissolved in a mixed solution of 58 ml of trifluoroacetic acid and 30 ml of methylene chloride and the mixture was stirred at the same temperature for 3 hours. 300 ml of ice water was added to the reaction mixture, crystals precipitated by neutralization with a 1N-sodium hydroxide aqueous solution were collected by filtration and these crystals were dissolved in methylene chloride. Then, this organic layer was washed with water and dried over anhydrous sodium sulfate and then the solvent was removed. The resulting residue was applied to silica gel column chromatography to obtain 4.6 g of the title compound as white powder.

Provenance & Evidence