Réaction #725875

Équation de réaction

diethylamine

thionyl chloride

benzoic acid

benzoic acid

→

N,N-diethyl benzamide

Solvants

H2O

Conditions de réaction

Traitement

1. 1
   workup.DISSOLUTIONdissolved
2. 2
   AutreExcess thionyl chloride was removed under reduced pressure
3. 3
   Autreleaving the crude acid chloride as a low melting solid which
4. 4
   Autrewas used without further purification
5. 5
   workup.DISSOLUTIONThe crude acid chloride was dissolved in CH2Cl2(20 mL)
6. 6
   workup.ADDITIONTo this stirred solution was added triethylamine (4 mL)
7. 7
   Températureto warm to room temperature
8. 8
   AutreThe reaction mixture was transferred to a separatory funnel
9. 9
   AutreThe organic layer was separated
10. 10
    Lavagewashed with 5% HCl (2×25 mL), H2O (25 ml)
11. 11
    Séchagedried over Na2SO4
12. 12
    AutreThe solvent was removed under reduced pressure

Mode opératoire

A mixture of thionyl chloride (6 mL) and the benzoic acid was heated at reflux until the starting benzoic acid dissolved. Excess thionyl chloride was removed under reduced pressure leaving the crude acid chloride as a low melting solid which was used without further purification. The crude acid chloride was dissolved in CH2Cl2(20 mL) and cooled to −10° C. To this stirred solution was added triethylamine (4 mL), followed by the dropwise addition of diethylamine (1.4 equivalents). The heterogeneous reaction mixture was allowed to warm to room temperature and was stirred for 30 minutes. The reaction mixture was transferred to a separatory funnel containing H2O (20 mL). The organic layer was separated and washed with 5% HCl (2×25 mL), H2O (25 ml), and dried over Na2SO4. The solvent was removed under reduced pressure to afford the product N,N-diethyl benzamide.

Source