Effective Strategy for the Preparation of Indolocarbazole Aglycons and Glycosides: Total Synthesis of Tjipanazoles B, D, E, and I
作者:Jeffrey T. Kuethe、Audrey Wong、Ian W. Davies
DOI:10.1021/ol035418r
日期:2003.10.1
[reaction: see text] An effective strategy has been developed for the rapid and efficient preparation of ortho-nitrostyrenes, which can be converted to unsymmetrical 2,2'-biindoles. A unique condensation of these 2,2'-biindoles with (dimethylamino)-acetaldehyde diethyl acetal affords the indolocarbazole ring system of the tjipanazole aglycon alkaloids in three synthetic steps and good to excellent
[反应:见正文]已经开发出一种有效的策略,用于快速高效地制备邻硝基苯乙烯,该邻硝基苯乙烯可以转化为不对称的2,2'-双吲哚。这些2,2'-联吲哚与(二甲基氨基)-乙醛二乙基缩醛的独特缩合可在三个合成步骤中获得替潘唑苷元生物碱的吲哚并咔唑环系,并具有优异的总收率。还讨论了吉潘唑糖苷生物碱B和E的第一个全合成。