反应详情

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+).

1. temperatureat reflux for 3 days
2. extractionextracted with DCM
3. washThe extracts were washed with water
4. dry with materialdried (MgSO4)
5. customevaporated in vacuo to an off white solid which
6. customwas purified by chromatography (silica, 4-10% EtOAc/isohexane)