Reaction #79889

Reaction equation

5-[4-(benzyloxy)phenyl]-4-chloro-7-(1,4-dioxaspiro[4.5]dec-8-yl)-7H-pyrrolo[2,3-d]pyrimidine

ammonium hydroxide

Ethyl acetate

sodium chloride

→

5-[4-(benzyloxy)phenyl]-7-(1,4-dioxaspiro[4.5]dec-8-yl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine

Yield 81.0%

Solvents

dioxane

Conditions

Workup

1. 1
   Temperatureto cool to room temperature
2. 2
   OtherThe layers were partitioned
3. 3
   Extractionthe aqueous layer was extracted with ethyl acetate (700 mL)
4. 4
   Washwashed with water
5. 5
   Dryingdried over magnesium sulfate
6. 6
   Otherthe solvent removed under reduced pressure
7. 7
   OtherThe compound was purified by flash chromatography on silica using 5% methanol in dichloromethane

Procedure

A mixture of 5-[4-(benzyloxy)phenyl]-4-chloro-7-(1,4-dioxaspiro[4.5]dec-8-yl)-7H-pyrrolo[2,3-d]pyrimidine (1.925 g, 4.01 mmol) and concentrated ammonium hydroxide (50 ml) in dioxane (50 mL) was heated at 120° C. in a pressure vessel for 20 hours. The reaction mixture was allowed to cool to room temperature. Ethyl acetate (300 mL) and saturated sodium chloride aqueous solution (300 mL) were added. The layers were partitioned and the aqueous layer was extracted with ethyl acetate (700 mL). The organic layers were combined, washed with water, dried over magnesium sulfate, and the solvent removed under reduced pressure. The compound was purified by flash chromatography on silica using 5% methanol in dichloromethane to give 1.457 g (81%) of 5-[4-(benzyloxy)phenyl]-7-(1,4-dioxaspiro[4.5]dec-8-yl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine. 1H NMR (DMSO-d6, 400 MHz) δ 8.13(s, 1H), 7.49-7.31(m, 8H), 7.121-7.100(d, 2H, J=8 Hz), 6.02(br s, 2H), 5.149(s, 2H), 4.681-4.620 (m, 1H), 3.94-3.88(m, 4H), 2.12-2.03(m, 2H), 1.93-1.90(m, 2H), 1.82-1.71(m, 4H); Waters 2690 Alliance HPLC (Symmetry Shield RP18 3.5 μm, 2.1×50 mm; 5%-95% acetonitrile-0.1 M ammonium acetate over 15 min, 0.5 mL/min) Rt 6.924 min.

Source