作者:Nadia Fonteneau、Philippe Martin、Martine Mondon、Hervé Ficheux、Jean-Pierre Gesson
DOI:10.1016/s0040-4020(01)00918-8
日期:2001.10
triflates has been developed to prepare 7-methyl rhein from emodin and new xanthone analogs of rhein. This approach avoids the oxidation step of methyl derivatives with toxic chromium salts. Although possessing the same structural arrangement of phenol and carboxylic acid functions as found in rhein, these new xanthone derivatives have no activity against IL-1. Thus, the quinone moiety of rhein appears to
已经开发了一种基于芳基三氟甲磺酸酯羰基化的新策略,可以从大黄素和大黄酸的新蒽酮类似物制备7-甲基大黄酸。该方法避免了甲基衍生物与有毒铬盐的氧化步骤。尽管这些新的黄酮衍生物具有与大黄酸相同的酚和羧酸功能结构排列,但它们对IL-1没有活性。因此,大黄酸的醌部分似乎对于活性是必不可少的。