Reaktion #1747829

Reaktionsgleichung

NaOH

n-propylamine

3-(4-methoxyphenyl)-propionic acid

thionylchloride

→

amide

3-(4-methoxyphenyl)-propionic acid n-propylamide

Lösungsmittel

dichloromethane

dichloromethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe volatiles were evaporated
2. 2
   workup.DISSOLUTIONthe resulting oil was dissolved in dichloromethane (100 mL)
3. 3
   Sonstigewere separated
4. 4
   Extraktionthe aqueous layer was extracted with dichloromethane (3×50 mL)
5. 5
   WaschenThe combined organic layers were washed with water (50 mL) and brine (50 mL)
6. 6
   Trocknenwas dried over MgSO4
7. 7
   SonstigeEvaporation of the solvent

Vorschrift

3-(4-methoxyphenyl)-propionic acid (8.8 g, 49 mmol) was refluxed in dichloromethane (200 mL) with thionylchloride (6.6 mL, 90 mmol) for 1 h. The volatiles were evaporated and the resulting oil was dissolved in dichloromethane (100 mL). This was added to a vigorously stirred mixture of 5% aqueous NaOH (200 mL), dichloromethane (100 mL) and n-propylamine (3.0 mL, 71 mmol). After stirring for 1 h the layers were separated and the aqueous layer was extracted with dichloromethane (3×50 mL). The combined organic layers were washed with water (50 mL) and brine (50 mL) and was dried over MgSO4. Evaporation of the solvent gave the amide in quantitative yield (10.7 g, 49 mmol, 100%). IR (neat) cm−1 3300, 2961; 1734, 1642; MS (EI) m/z 221 (M+) Analyses were in agreement with literature data.

Quelle