Isolation, Enantioselective Total Synthesis and Structure Determination of the Anthrapyran Metabolite SS 43405-e
作者:Lutz F. Tietze、Ramakrishna Reddy Singidi、Kersten M. Gericke、Henning Böckemeier、Hartmut Laatsch
DOI:10.1002/ejoc.200700534
日期:2007.12
The first enantioselective total synthesis of the anthrapyran metabolite SS 43405-e, isolated from a marine-derived streptomycete, is described, which also allows the determination of the so far unknown absolute (R) configuration of the natural product. For the synthesis the bromoanthracene derivative 3 is lithiated and coupled with the enantiopure aldehyde (S)-4 to give 9, which is oxidatively transformed
描述了从海洋来源的链霉菌中分离出的炭疽代谢物 SS 43405-e 的第一个对映选择性全合成,这也允许确定迄今为止未知的天然产物的绝对 (R) 构型。对于合成,溴蒽衍生物 3 被锂化并与对映体纯醛 (S)-4 偶联得到 9,将其氧化转化为相应的蒽醌 10 并进一步转化为酮 2。最后一步是在酸性条件下环化 2条件以提供所需的抗生素 (S)-1。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)