作者:Matthias Köck、Christoph Timm
DOI:10.1055/s-2006-942477
日期:2006.8
Pyridinium alkaloids are widely distributed in marine sponges of the order Haplosclerida. The cyclic trimeric 3-alkylpyridinium alkaloid viscosamine, from the Arctic sponge Haliclona viscosa, was synthesised through a ten-step synthesis starting from pyridylalcohol in 8% overall yield. Key steps involved the simultaneous activation and deprotection of an open chain precursor, followed by cyclisation
吡啶鎓生物碱广泛分布于单核目海海绵中。来自北极海绵 Haliclona viscosa 的环状三聚体 3-烷基吡啶鎓生物碱粘胺是通过从吡啶醇开始的十步合成以 8% 的总产率合成的。关键步骤涉及同时激活和去保护开链前体,然后在高度稀释条件下进行环化。Viscosamine 是第一个通过全合成获得的环三聚体 3-烷基吡啶鎓天然产物。