Dimethyl Sulfoxide → 2-ethoxy-5-(4-isopropoxyphenyl)-6-methyl-3-{[2'-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)biphenyl-4-yl]methyl}pyrimidin-4(3H)-one

Temperatur

50 °C

A mixture of hydroxylammonium chloride (0.77 g), sodium hydrogen carbonate (1.1 g) and dimethyl sulfoxide (5 mL) was stirred at 50° C. for 30 min, 4′-{[2-ethoxy-5-(4-isopropoxyphenyl)-4-methyl-6-oxopyrimidin-1(6H)-yl]methyl}biphenyl-2-carbonitrile (0.53 g) was added, and the mixture was stirred overnight at 90° C. The reaction mixture was diluted with ethyl acetate, washed with water and then with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The residue was dissolved in tetrahydrofuran (5 mL), N,N′-carbonyldiimidazole (0.27 g) and then 1,8-diazabicyclo[5.4.0]undec-7-ene (0.25 mL) were added, and the mixture was stirred at room temperature for 30 min. The reaction mixture was diluted with ethyl acetate, washed with 5% aqueous potassium hydrogen sulfate solution and then with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure and the residue was purified by silica gel column chromatography to give the title compound (0.39 g, 66%) as a colorless solid.

1. stirringthe mixture was stirred overnight at 90° C
2. washwashed with water
3. dry with materialwith saturated brine, and dried over anhydrous magnesium sulfate
4. customThe solvent was evaporated under reduced pressure
5. dissolutionThe residue was dissolved in tetrahydrofuran (5 mL)
6. additionN,N′-carbonyldiimidazole (0.27 g) and then 1,8-diazabicyclo[5.4.0]undec-7-ene (0.25 mL) were added
7. stirringthe mixture was stirred at room temperature for 30 min
8. additionThe reaction mixture was diluted with ethyl acetate
9. washwashed with 5% aqueous potassium hydrogen sulfate solution
10. dry with materialwith saturated brine, and dried over anhydrous magnesium sulfate
11. customThe solvent was evaporated under reduced pressure
12. customthe residue was purified by silica gel column chromatography

ORD-Eintrag

ord-4978bbcf519a42979668a0624d4891a1

Quelldatensatz

uspto-grants-2010_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07803940B2