Total Synthesis of the Oxopolyene Macrolide (−)-Marinisporolide C
作者:Luiz C. Dias、Emílio C. de Lucca
DOI:10.1021/acs.orglett.5b03352
日期:2015.12.18
The first totalsynthesis of (−)-marinisporolide C was performed in 25 steps (longest linear sequence) and an overall yield of 1%. Due to the high degree of convergence and robustness, the C9–C35 fragment that corresponds to the polyol portion was obtained in gram quantity. Highlights of this synthesis include five highly stereoselective aldol reactions responsible for the construction of five C–C
Marinisporolides, Polyene-Polyol Macrolides from a Marine Actinomycete of the New Genus <i>Marinispora</i>
作者:Hak Cheol Kwon、Christopher A. Kauffman、Paul R. Jensen、William Fenical
DOI:10.1021/jo801944d
日期:2009.1.16
Two new polyene macrolides, marinisporolides A and B (1, 2), were isolated from the saline culture of the marine actinomycete, strain CNQ-140, identified as a member of the new marine genus Marinispora. The marinisporolides are 34-membered macrolides composed of a conjugated pentaene and several pairs of 1,3-dihydroxyl functionalities. Marinisporolide A (1) contains a bicyclic spiro-bis-tetrahydropyran
从海洋放线菌 CNQ-140 菌株的盐水培养物中分离出两种新的多烯大环内酯类,marinisporolides A 和 B ( 1 , 2 ),该菌株被鉴定为新海洋属Marinispora的成员。marinisporolides 是由共轭戊烯和几对 1,3-二羟基官能团组成的 34 元大环内酯。Marinisporolide A ( 1 ) 包含双环螺双-四氢吡喃缩酮官能团,而 marinisporolide B ( 2 ) 是相应的半缩酮。这些新化合物的结构通过组合光谱和化学方法确定,包括广泛的 2D NMR 实验和13来自 Kishi 的通用核磁共振数据库的 C 核磁共振数据。化学修饰,包括甲醇分解、丙酮化物形成和改进的 Mosher 方法的应用,提供了这些分子的完整立体结构。三个额外的大环内酯类,marinisporolides CE ( 3-5 ),它们是 marinisporolide
Total Synthesis of (−)-Marinisporolide C
作者:Luiz C. Dias、Emilio C. de Lucca
DOI:10.1021/acs.joc.7b00023
日期:2017.3.17
The first total synthesis of (−)-marinisporolide C is described, which establishes unequivocally the relative and absolute configuration of this oxopolyene macrolide. Key features of this synthesis include a series of highly stereoselective aldol reactions followed by directed reductions to build the polyol domain, a Stille cross-coupling reaction to assemble the polyene, and an intramolecular Hor