A new method for the preparation of methoxyisatins from the corresponding methoxyanilines is described. The resulting methoxyisatins were used in the syntheses of several methoxytryptanthrin compounds. The natural product ophiuroidine (4,8,9-trihydroxytryptanthrin) was obtained from the appropriate trimethoxy precursor using a microwave-mediated Prey demethylation.
                                    本文介绍了一种从相应的
甲氧基苯胺制备甲氧基
靛红的新方法。得到的甲氧基异
砹被用于合成几种甲氧基色黄素化合物。利用微波介导的 Prey 去甲基化法,从相应的
三甲氧基前体中获得了
天然产物表黑啶(4,8,9-三羟基色黄素)。