Hydrochloric Acid → (11R,12S,13E,15S,17S)-9-butyloxy-11,15-dihydroxy-17,20-dimethyl-7-thiaprosta-8,13-dienoic acid

Methyl(11R,12S,13E,15S,17S)-9-butyloxy-11,15-dihydroxy-17,20-dimethyl-7-thiaprosta-8,13-dienoate (51 mg, 0.11 mmol) was dissolved in acetone (1 ml). To this solution was added a pH 8 phosphate buffer (10 ml). Further esterase (from porcine liver made by Sigma Co., 114 μl) was added and the mixture was stirred at room temperature for five hours. Further in a state with methyl ester remaining, the reaction solution was ice cooled, was made pH 4 by dilute hydrochloric acid, and was saturated by ammonium sulfate. The mixture was extracted by ethyl acetate, the extract was dried, then was concentrated under reduced pressure. The concentrate was purified by thin layer chromatography (developing solvent: ethyl acetate, Rf=0.2) to obtain (11R,12S,13E,15S,17S)-9-butyloxy-11,15-dihydroxy-17,20-dimethyl-7-thiaprosta-8,13-dienoic acid (7 mg, 14%).

1. additionFurther esterase (from porcine liver made by Sigma Co., 114 μl) was added
2. temperaturecooled
3. extractionThe mixture was extracted by ethyl acetate
4. customthe extract was dried
5. concentrationwas concentrated under reduced pressure
6. customThe concentrate was purified by thin layer chromatography (developing solvent: ethyl acetate, Rf=0.2)

ORDレコード

ord-e22638b8245f48a095b97a9f8f553d18

出典データセット

uspto-grants-1998_03

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US05731452