Reacción #2383793

Ecuación de reacción

2,3,4,5-tetrahydro-1,4-benzoxazepin-5-one

potassium nitrate

→

title compound

Rendimiento 22.2%

7-Nitro-2,3,4,5-tetrahydro-1,4-benzoxazepin-5-one

Rendimiento 22.2%

Disolventes

sulfuric acid

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.WAITfor 4 h at room temperature
2. 2
   Filtraciónthe solids were collected by filtration
3. 3
   Temperaturacooled

Procedimiento

To 2,3,4,5-tetrahydro-1,4-benzoxazepin-5-one (30.34 g, 190 mmol) in conc. sulfuric acid (600 ml) at 0° C. was added potassium nitrate (20.82 g, 206 mmol) portionwise. The mixture was stirred for 20 minutes at 0° C. and then for 4 h at room temperature. The mixture was poured onto ice (21) and the solids were collected by filtration. The solids were taken up in hot ethyl acetate and then cooled to yield the title compound (8.79 g, 22%), MS m/z 209 [M+H]+.

Fuente