2-Cyano-. DELTA. 3-piperidines. V. Towards the synthesis of corynanthe-type indole alkaloids. Computer-assisted study of the conformations of an" inside" …

DS Grierson, M Vuilhorgne, G Lemoine…

Index: Grierson, David S.; Vuilhorgne, Marc; Husson, Henri-Philippe Journal of Organic Chemistry, 1982 , vol. 47, # 23 p. 4439 - 4452

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Citation Number: 31

Abstract

1-[~-[~,-(Phenylsulfonyl) indol-3-yl] ethyl]-2-cyan~ A3-piperidines 21 and 26 have been used to mimic the two-step reaction sequence 7-8 (Scheme I) in which a 5, 6-dihydropyridinium salt, 7, acts as a potential precursor of the tetracyclic corynanthe-type indole alkaloids. The required amino nitriles 21 and 26 were prepared by an established four-step procedure from the corresponding pyridinium Amino nitrile 21 was successfully condensed with sodium ...