Synthesis of 2, 3, 10, 11??tetraalkoxy??substituted tetrahydrobenzo [a] naphtho [1, 2??g] quinolizines

KY Zee??Cheng, WH Nyberg…

Index: Zee-Cheng,K.Y. et al. Journal of Heterocyclic Chemistry, 1972 , vol. 9, p. 813 - 816

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Abstract

Abstract 2 Four3, 10, 11-tetraalkoxy-substituted 5, 6, 15, 15a-tetrahydro-8H-benzo [a] naphtho [1, 2-g]-quinolizines were prepared by the Pictet-Spengler cyclization of the respective 1-(6, 7-dialkoxy-2-naphthylmethyl)-6, 7-dialkoxy-1, 2, 3, 4-tetrahydroisoquinolines . The latter compounds were obtained by a chemical reduction of the corresponding dihydro compounds, which, in turn, were formed by a Bischler-Napieralski cyclization of the ...