Water → HCID 66960370, compound

Temperature

-20 °C

A solution of 4-methoxy-5-nitro-2-vinylpyrimidine (260 mg) in methylene chloride (15 mL) was stirred with an ozone stream of bubbling at −50° C. for 1 hr. After the reaction mixture was warmed to −20° C., the ozone stream was stopped and dimethyl sulfide (1.06 mL) was added to the reaction mixture. The reaction mixture was gradually warmed up to room temperature with stirring for 30 min. The reaction mixture was concentrated under reduced pressure to obtain the corresponding crude aldehyde. To a solution of the crude aldehyde and triethyl phosphonoacetate (0.432 mL) in THF (5 mL) was added lithium hydroxide monohydrate (90.6 mg) at 0° C. After stirring for 1.5 hr at room temperature, water and ethyl acetate was added to the reaction mixture and an organic layer was separated. The obtained organic layer was sequentially washed with water and saturated saline solution, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluting solvent: heptane/ethyl acetate) to give the title compound (100 mg). The physical data of the title compound was described as below.

1. customof bubbling at −50° C. for 1 hr
2. additiondimethyl sulfide (1.06 mL) was added to the reaction mixture
3. temperatureThe reaction mixture was gradually warmed up to room temperature
4. concentrationThe reaction mixture was concentrated under reduced pressure
5. customto obtain the corresponding crude aldehyde
6. stirringAfter stirring for 1.5 hr at room temperature
7. customan organic layer was separated
8. washThe obtained organic layer was sequentially washed with water and saturated saline solution
9. dry with materialdried over anhydrous sodium sulfate
10. concentrationconcentrated under reduced pressure
11. customThe residue was purified by silica gel column chromatography (eluting solvent: heptane/ethyl acetate)

ORD record

ord-6ccd393a90f54ed685bee6642a3aa792

Source dataset

uspto-grants-2010_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07687640B2