aglycone moiety of loganin that has a 5,6-fused bicyclic framework and exhibits a wide range of interesting biological activities. A gram-scale synthesis of loganetin has been accomplished from the readily accessible S-(+)-carvone. The key reactions of the synthesis are a Favorskii rearrangement to introduce four stereocenters and a sulfuric acid-meditated deprotection/cyclization reaction to assemble the
Loganetin 是
马钱素的糖苷配基部分,具有 5,6-稠合双环框架并表现出广泛的有趣
生物活性。已从易于获得的S -(+)-
香芹酮中完成了 loganetin 的克级合成。合成的关键反应是 Favorskii 重排以引入四个立体中心和
硫酸介导的脱保护/环化反应以组装具有完全立体选择性的敏感二氢
吡喃环。这项工作还使我们能够成功合成 C1 甲氧基马钱子素和马钱子素的对映异构体。