反应详情

A solution of 2-aminoethyl nicotinate dihydrochloride (1.5 g, 6.3 mmol) and 2,4,5-trichlorophenyl-N-(2-fluoroethyl)-N-nitrosocarbamate (2.18 g, 6.9 mmol) in 50 mL of pyridine was stirred under nitrogen at room temperature for 24 hours. The reaction was monitored by thin layer chromatography (silica, 1:1 chloroform/ethyl acetate, Rf 0.25). The solvent was removed in vacuo and the residue was chromatographed on a silica gel column by eluting, first with benzene to remove unreacted nitrosocarbamate and trichlorophenol, and then with chloroform to elute the desired product. The compound (1.56 g, 87.4%) melted at 75°-77° C. and was characterized by the structural formula: ##STR153##

1. customThe solvent was removed in vacuo
2. customthe residue was chromatographed on a silica gel column
3. washby eluting, first with benzene
4. customto remove unreacted nitrosocarbamate and trichlorophenol
5. washwith chloroform to elute the desired product