Hydrochloric Acid → HCID 53749077, compound

The solution of ALB-CN in tetrahydrofuran (0.1M, 0.40 ml) obtained in Example 5 was concentrated at room temperature for 1 hour under reduced pressure, then 0.4 ml of toluene was added thereto under an argon atmosphere. To this solution was added dimethyl phosphite (37 μl, 0.40 mmol) at room temperature. After stirring at room temperature for 30 minutes, the reaction vessel was cooled to -40° C., and it was maintained at this temperature for 15 minutes. Then p-methoxybenzaldehyde (0.40 mmol) was added thereto. After reacting for 59 hours, 1N hydrochloric acid was added to stop the reaction. The mixture was extracted with ethyl acetate (10 ml×three times), and the combined extracts were washed with brine and dried over Na2SO4. The solvent was distilled, and the residue was purified by flash column chromatography (acetone/hexane=1/5, on SiO2) to obtain dimethyl (R)-hydroxy(p-methoxyphenyl)methylphosphonate as a final product in a yield of 25%. The chemical reaction in this Example is shown in chemical formula 46. ##STR40##

1. concentrationThe solution of ALB-CN in tetrahydrofuran (0.1M, 0.40 ml) obtained in Example 5 was concentrated at room temperature for 1 hour under reduced pressure
2. addition0.4 ml of toluene was added
3. temperaturethe reaction vessel was cooled to -40° C.
4. temperatureit was maintained at this temperature for 15 minutes
5. waitAfter reacting for 59 hours
6. customthe reaction
7. extractionThe mixture was extracted with ethyl acetate (10 ml×three times)
8. washthe combined extracts were washed with brine
9. dry with materialdried over Na2SO4
10. distillationThe solvent was distilled
11. customthe residue was purified by flash column chromatography (acetone/hexane=1/5, on SiO2)

ORD record

ord-08a64a3a9f274cd3b86ced6b81687da5

Source dataset

uspto-grants-2000_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06090969