反应详情

1-(2,3,4,6-Tetra-O-acetyl-β-D-glucopyranosyl)-4-chloro-3-(5-(4-cyanophenyl)-2-thienylmethyl)benzene (128 mg) obtained in Example 191-(1) was dissolved in acetic acid (2 ml) and added thereto was a concentrated hydrochloric acid aqueous solution (2 ml). The mixture was refluxed for 6.5 hours. To the mixture was added a 10% aqueous sodium hydroxide solution at 0° C., and the mixture was washed with ethyl acetate. The aqueous layer was acidified by adding concentrated hydrochloric acid, and extracted with a mixture of ethyl acetate and tetrahydrofuran. The extract was dried over magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by washing with a mixture of ethyl acetate and diethyl ether to give the desired 1-(β-D-glucopyranosyl)-3-(5-(4-carboxyphenyl)-2-thienylmethyl)-4-chlorobenzene (49 mg) as pale brown powder. ESI-Mass m/Z 489/491 (M−H).

1. additionadded
2. temperatureThe mixture was refluxed for 6.5 hours
3. washthe mixture was washed with ethyl acetate
4. additionby adding concentrated hydrochloric acid
5. extractionextracted with a mixture of ethyl acetate and tetrahydrofuran
6. dry with materialThe extract was dried over magnesium sulfate
7. customthe solvent was evaporated under reduced pressure
8. customThe residue was purified
9. washby washing with a mixture of ethyl acetate and diethyl ether