Synthesis of 1′??methylspiro [3H??indole??3, n'??piperidines] from 1??methyl??n??piperidinecarbaldehydes

Y Benito, L Canoira, N Martinez??Lopez…

Index: Benito, Y.; Canoira, L.; Martinez-Lopez, N.; Rodriguez, J. G.; Temprano, F. Journal of Heterocyclic Chemistry, 1987 , vol. 24, p. 623 - 628

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Citation Number: 12

Abstract

Abstract 1′-Methylspiro [3H-indole-3, n'-piperidines] 2 can be obtained from the 1-methyl-n- piperidinecarbaldehydes 1 by the Fischer reaction of their phenylhydrazones. The Fischer reaction provides different kinds of products-3H-indole, indole and oxindole-which depend on the N atom position in the piperidine ring.