Reaktion #1783391

Reaktionsgleichung

water

ethyl(diethoxyphosphoryl)acetate

sodium hydride

cis-3-(2-oxo-3,6-dihydroimidazo[4,5-d]pyrrolo[2,3-b]pyridin-1(2H)-yl)cyclohexanecarbaldehyde

→

(2E)-3-[cis-3-(2-oxo-3,6-dihydroimidazo[4,5-d]pyrrolo[2,3-b]pyridin-1(2H)-yl)cyclohexyl]acrylic acid

Lösungsmittel

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGstirred at ambient temperature for overnight
2. 2
   Extraktionextracted with EtOAc and tetrahydrofuran
3. 3
   WaschenThe organic layer was washed with brine
4. 4
   Trocknendried over MgSO4
5. 5
   Sonstigeevaporated in vacuo
6. 6
   SonstigeThe residue was purified by praparative thin layer chromatography
7. 7
   Wascheneluting with dichloromethane
8. 8
   workup.ADDITIONThe fractions containing desired compound
9. 9
   Sonstigeevaporated
10. 10
    workup.DISSOLUTIONThe residue was dissolved in dioxane (500 μl)
11. 11
    workup.ADDITION1M NaOH solution (352 μl) was added
12. 12
    workup.STIRRINGstirred at 100° C. for 2 hours
13. 13
    TemperaturAfter cooling to the ambient temperature, 1M HCl (352 μl) and pH 4 buffer (10 ml)
14. 14
    workup.ADDITIONwas added to the reaction mixture
15. 15
    SonstigeResulting
16. 16
    Sonstigeprecipitates
17. 17
    Filtrationwere collected by filtration
18. 18
    Waschenwashed with water

Vorschrift

To a suspension of sodium hydride (60% in oil) (15 mg) in tetrahydrofuran (1 ml) was added dropwise ethyl(diethoxyphosphoryl)acetate (84 μl). After stirring at ambient temperature for 5 minutes, cis-3-(2-oxo-3,6-dihydroimidazo[4,5-d]pyrrolo[2,3-b]pyridin-1(2H)-yl)cyclohexanecarbaldehyde (100 mg) was added and stirred at ambient temperature for overnight. The reaction mixture was poured into water, and extracted with EtOAc and tetrahydrofuran. The organic layer was washed with brine, dried over MgSO4 and evaporated in vacuo. The residue was purified by praparative thin layer chromatography eluting with dichloromethane:methanol=10:1. The fractions containing desired compound were combined and evaporated. The residue was dissolved in dioxane (500 μl), and 1M NaOH solution (352 μl) was added, then stirred at 100° C. for 2 hours. After cooling to the ambient temperature, 1M HCl (352 μl) and pH 4 buffer (10 ml) was added to the reaction mixture. Resulting precipitates were collected by filtration and washed with water to give (2E)-3-[cis-3-(2-oxo-3,6-dihydroimidazo[4,5-d]pyrrolo[2,3-b]pyridin-1(2H)-yl)cyclohexyl]acrylic acid (21 mg) as a yellow powder.

Quelle