Reacción #68531

Ecuación de reacción

5-[(3-Bromo-2-methoxy-pyridin-4-ylamino)-methylene]-2,2-dimethyl-[1,3]dioxane-4,6-dione

diphenyl ether

→

8-Bromo-7-methoxy-1H-[1,6]naphthyridin-4-one

Disolventes

hexane

hexane

Condiciones de reacción

Tratamiento posterior

1. 1
   OtroA two neck round bottomed flask equipped with an air condenser
2. 2
   Temperaturawas cooled to RT
3. 3
   Filtraciónfiltered
4. 4
   Otroto obtain a dark solid
5. 5
   Filtraciónfiltered

Procedimiento

A two neck round bottomed flask equipped with an air condenser was charged with 5-[(3-Bromo-2-methoxy-pyridin-4-ylamino)-methylene]-2,2-dimethyl-[1,3]dioxane-4,6-dione (23 g, 64 mmol) and diphenyl ether (230 mL). The reaction mixture was heated at 250° C. for 30 min under nitrogen atmosphere after which it was cooled to RT, diluted with hexane and filtered to obtain a dark solid. The crude product was refluxed in hexane for 30 min and filtered to obtained 8-Bromo-7-methoxy-1H-[1,6]naphthyridin-4-one as a brown solid.

Fuente