反应详情

0.3 g. of p-acetamidophenol are dissolved in a solution of 0.12 g. of sodium in 10 ml. of absolute ethanol and 0.55 g. of 1-(2-chloroethyl)-4 -(p-fluorophenyl)-1,2,3,6-tetrahydropyridine hydrochloride are added thereto all at once. The reaction mixture is heated under reflux conditions for 24 hours, filtered from the precipitated sodium chloride and the filtrate evaporated to dryness. The residue is absorbed on silica gel and eluted with methylene chloride-ether (1:1). The 4'-{2-[4-(p-fluorophenyl)-3,6-dihydro-1(2H)-pyridyl]-ethoxy}-acetanilide obtained from the eluate melts at 139°C. after recrystallization from acetic acid ethyl ester.

1. temperatureThe reaction mixture is heated under reflux conditions for 24 hours
2. filtrationfiltered from the precipitated sodium chloride
3. customthe filtrate evaporated to dryness
4. customThe residue is absorbed on silica gel
5. washeluted with methylene chloride-ether (1:1)