Total Synthesis of Virgatolide B via Exploitation of Intramolecular Hydrogen Bonding
作者:Paul A. Hume、Daniel. P. Furkert、Margaret A. Brimble
DOI:10.1021/jo5008527
日期:2014.6.6
A full account of the enantioselective totalsynthesis of virgatolide B is reported. Key features of the synthesis include an sp3–sp2 Suzuki–Miyaura cross-coupling of a β-trifluoroboratoamide with an aryl bromide, regioselective intramolecular carboalkoxylation, and a 1,3-anti-selective Mukaiyama aldol reaction. Intramolecular hydrogen bonding governed the regioselectivity of the key spiroketalization
the synthesis of mimics of the Fusarium mycotoxin zearalenone (1) have been developed. Optimized preparation of (E)-6-(1-alkenyl) substituted β-resorcylic acid esters was realized via ortho-directed lithiation of variable substrates combined with allylation/isomerization or via formylation/Schlosser–Wittig olefination using different protective group patterns. Spontaneous decarboxylation of (E)-6-(1-alkenyl)
摘要 已经开发了两种用于合成镰刀菌毒素玉米赤霉烯酮 (1) 模拟物的通用策略。(E)-6-(1-烯基)取代的β-间苯二甲酸酯的优化制备是通过可变底物的邻位锂化结合烯丙基化/异构化或通过使用不同保护基团模式的甲酰化/Schlosser-Wittig烯化来实现的。(E)-6-(1-烯基) 取代的 β-间苯二酸的自发脱羧表明该取代基对这些化合物的化学行为的影响。这些模拟物已用于开发用于合成 ZEN 的 II 期代谢物(葡萄糖苷、葡萄糖醛酸苷)的优化标准方案,进一步的应用(即硫酸盐偶联物)仍在研究中。补充材料可用于本文。转至出版商的 Synthetic Communications® 在线版以查看免费的补充文件。图形概要