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 ...
![N-(2-(benzo[d][1,3]dioxol-5-yl)ethyl)-2-(naphtho[2,3-d][1,3]dioxol-6-yl)acetamide Structure](https://image.chemsrc.com/caspic/225/37708-01-3.png)
![5-naphtho[2,3-d][1,3]dioxol-6-ylmethyl-7,8-dihydro-[1,3]dioxolo[4,5-g]isoquinoline Structure](https://image.chemsrc.com/caspic/001/763865-33-4.png)