Benzaldehyde → HCID 1550858, compound

The solution of ALB in tetrahydrofuran (0.1 M, 0.40 ml) obtained in Example 1 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 diethyl phosphite (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, benzaldehyde (0.40 mmol) was added thereto. After reacting for 90 hours, 1N hydrochloric acid was added thereto 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 diethyl (S)-hydroxy-phenylmethylphosphonate as a final product in a yield of 39%. The chemical reaction in this Example is shown in chemical formula 33. ##STR27##

1. concentrationThe solution of ALB in tetrahydrofuran (0.1 M, 0.40 ml) obtained in Example 1 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 90 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-b053bb0cf2f94fc9adf6f86ba379aaae

Source dataset

uspto-grants-2000_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06090969