Reacción #311901

Ecuación de reacción

2-methylthio-4-propylamino-5-pyrimidine carboxylic acid ethyl ester

ethyl malonyl chloride

diethyl ether

→

title product

7,8-dihydro-5-hydroxy-2-(methylthio)-7-oxo-8-propylpyrido[2,3-d]pyrimidine-6-carboxylic acid ethyl ester

Condiciones de reacción

Tratamiento posterior

1. 1
   Filtraciónwas filtered
2. 2
   OtroThe filtrate was evaporated in a rotary evaporator
3. 3
   workup.DISSOLUTIONthe residue was dissolved in 15 ml
4. 4
   workup.ADDITIONof ethanol and this solution was added to a solution of 1.15 g
5. 5
   workup.STIRRINGAfter stirring at room temperature for 5 minutes
6. 6
   workup.ADDITIONthe mixture was diluted with water to the cloudy point
7. 7
   OtroThe precipitate which formed
8. 8
   Otrowas collected
9. 9
   Otroair dried
10. 10
    Otrowas recrystallized from ethyl acetate
11. 11
    Otroto give 0.2 g

Procedimiento

To a solution of 12.8 g. (0.05 mole) of 2-methylthio-4-propylamino-5-pyrimidine carboxylic acid ethyl ester in 100 ml. of anhydrous diethyl ether was added 0.75 g. (0.025 mole) of ethyl malonyl chloride. The mixture was stirred at room temperature for 4 hours and was filtered. The filtrate was evaporated in a rotary evaporator and the residue was dissolved in 15 ml. of ethanol and this solution was added to a solution of 1.15 g. (0.05 g atom) of sodium in 100 ml. of ethanol. After stirring at room temperature for 5 minutes, the mixture was diluted with water to the cloudy point and was acidified with conc. hydrochloric acid. The precipitate which formed was collected, air dried and was recrystallized from ethyl acetate to give 0.2 g. of title product--m.p. 130°-133° C.

Fuente