반응 #2371

반응 방정식

sodium borohydride

N-[6-{2-(5-acetylpyrimidin-2-yloxy)ethoxy}-5-(3-methoxyphenoxy)pyrimidin-4-yl]-4-tert-butylbenzenesulfonamide

tetrahydrofuran

isopropyl alcohol

sodium borohydride

→

4-tert-butyl-N-[6-{2-(5-(1-hydroxyethyl)pyrimidin-2-yloxy)ethoxy}-5-(3-methoxyphenoxy)pyrimidin-4-yl]benzenesulfonamide

수율 75.3%

용매

water

반응 조건

후처리

1. 1
   온도cooling
2. 2
   온도cooling
3. 3
   workup.STIRRINGthe mixture is stirred for 30 minutes
4. 4
   추출extracted with ethyl acetate
5. 5
   세척The ethyl acetate layer is washed
6. 6
   기타dried
7. 7
   농축concentrated to dryness under reduced pressure
8. 8
   기타The residue is purified by silica gel column chromatography (solvent; chloroform/methanol=40:1~20:1)
9. 9
   기타recrystallized from ethyl acetate/n-hexane

실험 절차

To a mixture of N-[6-{2-(5-acetylpyrimidin-2-yloxy)ethoxy}-5-(3-methoxyphenoxy)pyrimidin-4-yl]-4-tert-butylbenzenesulfonamide (756 mg), tetrahydrofuran (10 ml) and isopropyl alcohol (10 ml) is added with stirring sodium borohydride (48 mg) under ice-cooling, and the mixture is stirred for 40 minutes under ice-cooling. To the reaction solution is further added sodium borohydride (14 mg), and the mixture is stirred for 30 minutes. The mixture is diluted with water, and extracted with ethyl acetate. The ethyl acetate layer is washed, dried, and concentrated to dryness under reduced pressure. The residue is purified by silica gel column chromatography (solvent; chloroform/methanol=40:1~20:1), and recrystallized from ethyl acetate/n-hexane to give 4-tert-butyl-N-[6-{2-(5-(1-hydroxyethyl)pyrimidin-2-yloxy)ethoxy}-5-(3-methoxyphenoxy)pyrimidin-4-yl]benzenesulfonamide (571 mg) as crystals.

출처