Reacción #40880

Ecuación de reacción

2,5-bis trifluoromethyl benzaldehyde

tert butyl sulfinamide

→

N-{(1E)-[2,5-bis(trifluoromethyl)phenyl]methylene}-2-methylpropane-2-sulfinamide

Rendimiento 91.0%

Disolventes

water

DCM

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturaat reflux for 3 days
2. 2
   Extracciónextracted with DCM
3. 3
   LavadoThe extracts were washed with water
4. 4
   Secadodried (MgSO4)
5. 5
   Otroevaporated in vacuo to an off white solid which
6. 6
   Otrowas purified by chromatography (silica, 4-10% EtOAc/isohexane)

Procedimiento

A mixture of 2,5-bis trifluoromethyl benzaldehyde (21.5 g, 88.8 mmol), tert butyl sulfinamide (16.1 g, 133 mmol) and anhydrous CuSO4 (16.5 g, 103 mmol) in DCM (94 ml) was stirred at room temperature for 16 hours and at reflux for 3 days. The fine suspension was diluted with water and extracted with DCM. The extracts were washed with water, dried (MgSO4) and evaporated in vacuo to an off white solid which was purified by chromatography (silica, 4-10% EtOAc/isohexane) to give the desired N-{(1E)-[2,5-bis(trifluoromethyl)phenyl]methylene}-2-methylpropane-2-sulfinamide as a white crystalline solid (14.8 g, 91%); 1H NMR δ (ppm)(CDCl3): 8.98 (1 H, d, J=1.8 Hz), 8.46 (1 H, s), 7.92-7.85 (2 H, m), 1.29 (9 H, s); m/z (ES+) 346 (MH+).

Fuente