A simple and effective approach to the synthesis of pyrido[4,3,2-mn]pyrrolo[3,2,1-de]acridine skeleton of arnoamines A and B, pentacyclic marine alkaloids from the ascidian Cystodytes sp.
作者:Oleg S. Radchenko、Nadezhda N. Balaneva、Vladimir A. Denisenko、Vyacheslav L. Novikov
DOI:10.1016/j.tetlet.2006.08.080
日期:2006.10
Starting from ethyl 5-hydroxy-2-methyl-1-phenylindole-3-carboxylate, a simple and effective approach to the synthesis of pyrido[4,3,2-mn]pyrrolo[3,2,1-de]acridine skeleton of arnoamines A and B, unique pentacyclic alkaloids from the ascidian Cystodytes sp., has been developed. Synthesis of this ring system involves seven steps and produces ethyl 4-methoxy-l-methyl-pyrido[4,3,2-mn]pyrrolo[3,2,1-de]acridine-2-carboxylate in 41.5% overall yield. (c) 2006 Elsevier Ltd. All rights reserved.