Reacción #43639

Ecuación de reacción

2,3-dihydro-1-benzofuran-5-carbaldehyde

sodium acetate

bromine

→

desired compound

Rendimiento 91.3%

7-bromo-2,3-dihydro-1-benzofuran-5-carbaldehyde

Rendimiento 91.3%

Disolventes

acetic acid

sodium thiosulfate

Condiciones de reacción

Tratamiento posterior

1. 1
   Lavadowashed with a saturated aqueous solution of sodium bicarbonate
2. 2
   Extracciónextracted with ethyl acetate
3. 3
   Secadodried over sodium sulfate
4. 4
   Otrodried in vacuo

Procedimiento

To a solution of 2,3-dihydro-1-benzofuran-5-carbaldehyde (1.0 g, 6.75 mmol) in glacial acetic acid (8 mL) was added sodium acetate (664 mg, 8.1 mmol) and bromine (0.7 ml, 13.5 mmol) at 10° C. slowly. The reaction was stirred for 2 hours at ambient temperature. The reaction was diluted with a saturated aqueous solution of sodium thiosulfate (10 mL), washed with a saturated aqueous solution of sodium bicarbonate, and then extracted with ethyl acetate. Organics were combined, dried over sodium sulfate and dried in vacuo to give the desired compound (1.4 g, 91%).

Fuente