Reacción #9994

Ecuación de reacción

2-chloro-6-(3-chloro-phenyl-amino)-purine

caesium carbonate

isopropyl iodide

→

2-Chloro-6-(3-chloro-phenyl-amino)-9-isopropyl-9H-purine

Disolventes

ethyl acetate

DMF water

dioxane

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.ADDITIONare added at room temperature
2. 2
   Otrothe reaction to completion
3. 3
   workup.STIRRINGthe reaction mixture is stirred at 45° C. for a further 24 hours
4. 4
   Lavadowashed with water (2 times) and saturated sodium chloride solution
5. 5
   Secadodried over magnesium sulfate
6. 6
   FiltraciónAfter filtration
7. 7
   Concentraciónthe filtrate is concentrated under reduced pressure at 35° C.
8. 8
   Otrothe residue is dried under an HV
9. 9
   OtroThe resulting crude product is purified by crystallization from diethyl ether/hexane

Procedimiento

500 mg (1.78 mmol) of 2-chloro-6-(3-chloro-phenyl-amino)-purine are dissolved in a mixture of 29.5 ml of DMF/water (85/15) and 5 ml of dioxane by means of gentle heating. 870 mg (2.67 mmol) of caesium carbonate, followed by 1.78 ml (17.8 mmol) of isopropyl iodide are added at room temperature. The reaction mixture is stirred at room temperature for 18 hours. To bring the reaction to completion, the reaction mixture is stirred at 45° C. for a further 24 hours. When the reaction has ended, the reaction mixture is diluted with ethyl acetate, washed with water (2 times) and saturated sodium chloride solution and dried over magnesium sulfate. After filtration, the filtrate is concentrated under reduced pressure at 35° C. and the residue is dried under an HV. The resulting crude product is purified by crystallization from diethyl ether/hexane. 2-Chloro-6-(3-chloro-phenyl-amino)-9-isopropyl-9H-purine is obtained; Rf=0.46 (ethyl acetate); m.p. 128–129° C.

Fuente