反应详情

To a solution of N-(benzylcarbonyl)-5-chloro-2-hydroxymethyl aniline (15.50 g) in dichloromethane (400 ml) under nitrogen at room temperature, was added pyridinium chlorochromate (24.30 g) and crushed 4 Å molecular sieves (0.50 g). The reaction mixture was stirred at room temperature for 90 mins, then ethyl acetate added, and the solution was filtered through a 2 inch plug of silica gel. The solvent was removed in vacuo and the material was redissolved in ethyl acetate and filtered through silica gel. Removal of the solvent under vacuum and trituration of the solid residue with diethyl ether gave the desired compound (10.50 g). δ (360 MHz, DMSO-d6) 3.82 (2H, s, NHCOCH2Ph), 7.27-7.39 (6H, m, Ph+5-H), 7.87 (1H, d, J=8.30 Hz, 6-H), 8.36 (1H, d, J=1.87 Hz, 3-H), 9.89 (1H, s, CHO), 10.97 (1H, bs, NHCOCH2Ph).

1. customcrushed 4 Å molecular sieves (0.50 g)
2. filtrationthe solution was filtered through a 2 inch plug of silica gel
3. customThe solvent was removed in vacuo
4. dissolutionthe material was redissolved in ethyl acetate
5. filtrationfiltered through silica gel
6. customRemoval of the solvent under vacuum and trituration of the solid residue with diethyl ether