First Total Synthesis of the Marine Natural Product Viscosamine
作者:Matthias Köck、Christoph Timm
DOI:10.1055/s-2006-942477
日期:2006.8
Pyridiniumalkaloids are widely distributed in marinesponges of the order Haplosclerida. The cyclic trimeric 3-alkylpyridinium alkaloid viscosamine, from the Arctic spongeHaliclonaviscosa, 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