Reacción #563114

Ecuación de reacción

2,5-Dimethylaniline

Acetic anhydride

Methanol

→

2,5-Dimethylacetanilide

Rendimiento 99.7%

Disolventes

tetrahydrofuran

Condiciones de reacción

Tratamiento posterior

1. 1
   Otrosolids formed
2. 2
   Otroafter 1 hour
3. 3
   workup.DISSOLUTIONdissolved the mass
4. 4
   OtroThe mixture was evaporated under reduced pressure
5. 5
   workup.DISSOLUTIONdissolved in hot DCM
6. 6
   Otropurified by flash chromatography on silica gel
7. 7
   Lavadoeluting with a mixture of methanol and DCM

Procedimiento

2,5-Dimethylaniline 16 (5.0 gm, 0.041 moles) was dissolved in 30 ml tetrahydrofuran (THF) at room temperature under argon. Acetic anhydride (5.9 ml, 0.062 moles) was added. Within 15 minutes, solids formed and the mixture became a solid white mass after 1 hour. Methanol was added which dissolved the mass. The mixture was evaporated under reduced pressure, dissolved in hot DCM and purified by flash chromatography on silica gel, eluting with a mixture of methanol and DCM. 2,5-Dimethylacetanilide 17 (6.67 gm, 99% yield) was isolated after removing the solvent. NMR (CDCl3) δ 7.53, 1H, br s; 6.89-7.06, 3H, m; 2.30, 3H, s; 2.19, 3H, s; 2.17, 3H, s.

Fuente