Synthesis of 2,3,10,11 -tetraalkoxy-substituted tetrahydrobenzo [a] naphtho [1,2-g] quinolizines |
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Authors: | Kwang Y Zee-Cheng Wayne H Nyberg C C Cheng |
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Abstract: | 2 Four3,10,11-tetraalkoxy-substituted 5,6,15,15a-tetrahydro-8H-benzoa]naphtho1,2-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 appropriate amides. |
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