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N-Arylpyrrolidines and N-arylpiperidines were synthesized in 20-88% yields by the reaction of aniline and aniline derivatives with 1,4-butane- and 1,5-pentanediols in the presence of Fe- containing catalysts and carbon tetrachloride. 1,4-Butane- and 1,5-pentanediols are partially chlorinated under the reaction conditions to give chlorohydrins, which subsequently undergo N- heterocyclization with anilines to give N-arylpyrrolidines and N-arylpiperidines.

Synthesis of N-aryl-substituted pyrrolidines and piperidines by reaction of anilines with α,ω-diols catalyzed by FeCl3.6H2O in carbon tetrachloride