Reacción #76093

Ecuación de reacción

(4-bromo-phenyl)-acetic acid

thionyl chloride

heptylamine

N,N-diisopropylethylamine

→

2-(4-bromo-phenyl)-N-heptyl-acetamide

Disolventes

chloroform

methylene chloride

methylene chloride

water

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturaunder reflux for 20 hours
2. 2
   Otroevaporated under vacuum
3. 3
   Otroto give an oil
4. 4
   Temperaturacooled to 0° C
5. 5
   Extracciónextracted with methylene chloride
6. 6
   LavadoThe extract was washed with saturated brine
7. 7
   Secadodried over anhydrous sodium sulfate
8. 8
   Otrothe solvent was removed under vacuum
9. 9
   OtroThe solid residue was purified by crystallization from ethyl acetate/hexanes

Procedimiento

A stirred solution of (4-bromo-phenyl)-acetic acid (0.186 mol, 40.0 g) and thionyl chloride (0.558 mol, 40.0 mL) in chloroform (500 mL) under a N2 atmosphere was heated under reflux for 20 hours. The mixture was cooled to room temperature and evaporated under vacuum to give an oil. This was dissolved in anhydrous methylene chloride (150 mL) and added dropwise to a solution of heptylamine (0.20 mol, 30.3 mL) and N,N-diisopropylethylamine (0.37 mol, 64.7 mL) in anhydrous methylene chloride cooled to 0° C. The mixture was stirred at room temperature for 45 minutes then poured into water and extracted with methylene chloride. The extract was washed with saturated brine, dried over anhydrous sodium sulfate and the solvent was removed under vacuum. The solid residue was purified by crystallization from ethyl acetate/hexanes to give 2-(4-bromo-phenyl)-N-heptyl-acetamide as a white solid. (37 g, 64%)

Fuente