反应详情

The compound (120 mg) obtained by the reaction in the same manner as in Example 172 (i) using the compound (200 mg) of Example 147, sodium 2-hydroxyethanethiolate (2.02 g), tetrahydrofuran (6.0 mL) and N,N-dimethylformamide (5.0 mL) was dissolved in dichloromethane (7.0 mL). m-Chloroperbenzoic acid (110 mg) was added at −18° C. and the mixture was stirred for 5 hrs. Saturated aqueous sodium hydrogen carbonate was added to the reaction mixture under ice-cooling, and the mixture was extracted with dichloromethane. The extract was dried over magnesium sulfate and concentrated, and the residue was separated and purified by silica gel column chromatography (eluent, ethyl acetate:methanol=100:0→ethyl acetate:methanol=80:20). Crystallization from diethyl ether/ethyl acetate/hexane gave the title compound (97.0 mg).

1. temperaturecooling
2. extractionthe mixture was extracted with dichloromethane
3. dry with materialThe extract was dried over magnesium sulfate
4. concentrationconcentrated
5. customthe residue was separated
6. custompurified by silica gel column chromatography (eluent, ethyl acetate:methanol=100:0→ethyl acetate:methanol=80:20)
7. customCrystallization from diethyl ether/ethyl acetate/hexane