反応 #88444

反応方程式

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

Compound 48

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

2-isopropylphenyl boronic acid

K3PO4

→

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

収率 14.3%

溶媒

dioxane

water

反応条件

後処理

1. 1
   その他The reaction was degassed with nitrogen (3×)
2. 2
   温度heated at 120° C. (MW) for 1.5 h
3. 3
   workup.ADDITIONdiluted with EA (10 mL) and water (2 mL)
4. 4
   ろ過filtered
5. 5
   濃縮The filtrate was concentrated to a residue which
6. 6
   その他was purified by Prep TLC PE/EA (2:1)

実験手順

To a solution of 3-(3-(tert-butyldimethylsilyloxy)propyl)-6-chloro-5-(1-hydroxy-3-methylbutyl)-1-methylpyrido[3,4-d]pyrimidine-2,4(1H,3H)-dione (See Compound 48, step 1, 130 mg, 0.277 mmol), 2-isopropylphenyl boronic acid (90.8 mg, 0.554 mmol), aq. 2M K3PO4 (0.68 ml, 1.35 mmol) in dioxane (1 mL) and water (0.2 mL) was added Pd(dppf)Cl2 (8 mg, 0.01 mmol). The reaction was degassed with nitrogen (3×), heated at 120° C. (MW) for 1.5 h, cooled to RT, diluted with EA (10 mL) and water (2 mL) and filtered. The filtrate was concentrated to a residue which was purified by Prep TLC PE/EA (2:1) to give 3-(3-(tert-butyldimethylsilyloxy)propyl)-5-(1-hydroxy-3-methylbutyl)-6-(2-isopropylphenyl)-1-methylpyrido[3,4-d]pyrimidine-2,4(1H,3H)-dione (22 mg, 14.3% yield) as a colorless oil. LCMS: MH+ 554 and TR=2.415 min.

出典