반응 #88454

반응 방정식

3-(3-(tert-butyldimethylsilyloxy)propyl)-6-chloro-5-(hydroxy(phenyl)methyl)-1-methylpyrido[3,4-d]pyrimidine-2,4(1H,3H)-dione

3-(trifluoromethoxy)phenylboronic acid

K3PO4

→

3-(3-(tert-butyldimethylsilyloxy)propyl)-5-(hydroxyl(phenyl)methyl)-1-methyl-6-(3-(trifluoromethoxy)phenyl)pyrido[3,4-d]pyrimidine-2,4(1H,3H)-dione

수율 44.0%

용매

dioxane

water

반응 조건

후처리

1. 1
   기타The reaction was degassed with nitrogen (3×)
2. 2
   온도heated at 120° C. (MW) for 2 h
3. 3
   workup.ADDITIONdiluted with EA (20 mL) and water (8 mL)
4. 4
   여과filtered through Celite
5. 5
   농축The filtrate was concentrated to a residue which
6. 6
   기타was purified by Prep TLC
7. 7
   세척eluted with PE/EA (2:1)

실험 절차

To a solution of 3-(3-(tert-butyldimethylsilyloxy)propyl)-6-chloro-5-(hydroxy(phenyl)methyl)-1-methylpyrido[3,4-d]pyrimidine-2,4(1H,3H)-dione (400 mg, 0.817 mmol), 3-(trifluoromethoxy)phenylboronic acid (336.9 mg, 1.635 mmol), aq. 2M K3PO4 (2 ml, 4.085 mmol) in dioxane (10 mL) and water (2 mL) was added Pd(dppf)Cl2 (21 mg, 0.0288 mmol). The reaction was degassed with nitrogen (3×), heated at 120° C. (MW) for 2 h, cooled to RT, diluted with EA (20 mL) and water (8 mL) and filtered through Celite. The filtrate was concentrated to a residue which was purified by Prep TLC eluted with PE/EA (2:1) to give 3-(3-(tert-butyldimethylsilyloxy)propyl)-5-(hydroxyl(phenyl)methyl)-1-methyl-6-(3-(trifluoromethoxy)phenyl)pyrido[3,4-d]pyrimidine-2,4(1H,3H)-dione (220 mg, 44% yield) as colorless oil. LCMS: MH+ 616 and TR=2.334 min.

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