Synthesis of 4-allyl-4-arylaminopiperidines and their transformations to spiro[tetrahydroquinoline-2,4′-piperidines] |
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Authors: | N. S. Prostakov V. V. Kuznetsov E. E. Stashenko |
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Affiliation: | (1) Patrice Lumumba Peoples' Friendship University, 117198 Moscow |
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Abstract: | It was established that the yields of a 4-allyl-4-aryl-aminopiperidines in the reaction of 4-aryliminopiperidines with allylmagnesium bromide increase significantly if the reaction is carried out in the presence of a crown ether. A number of previously unknown spiro[tetrahydroquinoline-2,4-piperidines] were obtained in the cyclization of 4-allyl-4-arylaminopiperidines in the presence of sulfuric acid.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1514–1519, November, 1989. |
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