Acetate → HCID 53840423, compound

Temperature

30 °C

A 200 ml reaction vessel was charged with 3 g of 2-(2,4-difluorophenyl)-1,3-dipropionyloxy-2-propanol, 200 mg of Lipase D made by Amano Pharmaceutical Co., Ltd. (derived from Rhizpus delemer, Enzyme No. 6), 100 ml of 50 mM acetate buffer (pH 5) and 10 ml of cyclohexane. The resulting mixture was stirred at 30° C. to react for 18 hours. After the reaction liquid was extracted three times with 50 ml of ethylacetate, the organic layers were combined and the combined organic layer was washed with saturated aqueous solution with sodium bicarbonate and with saturated aqueous solution with sodium chloride and dried over anhydrous sodium sulfate. The solvent was removed under reduced pressure and the residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=1/1) to give 1.55 g of oily (R)-2-(2,4-difluorophenyl)-3-propionyloxy-1,2-propanediol. An optical purity thereof was determined in the same manner as in Example 35. (Elution time: 16.7 minutes ((R)-form) and 13.5 minutes ((S)-form)).

1. customA 200 ml reaction vessel
2. customto react for 18 hours
3. customAfter the reaction liquid
4. extractionwas extracted three times with 50 ml of ethylacetate
5. washthe combined organic layer was washed with saturated aqueous solution with sodium bicarbonate and with saturated aqueous solution with sodium chloride
6. dry with materialdried over anhydrous sodium sulfate
7. customThe solvent was removed under reduced pressure
8. customthe residue was purified by column chromatography on silica gel (eluent: n-hexane/ethyl acetate=1/1)

ORD record

ord-ac915ba268c44c228bf54bef73c3162c

Source dataset

uspto-grants-1998_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05840553