Novel reaction products from the hypervalent iodine oxidation of hydroxylated stilbenes and isoflavones
作者:Cedric J. Lion、David A. Vasselin、Carl H. Schwalbe、Charles S. Matthews、Malcolm F. G. Stevens、Andrew D. Westwell
DOI:10.1039/b510240e
日期:——
for these new reaction pathways are discussed, and the X-ray crystal structure of 2,4'-dihydroxybenzil is presented. In contrast, oxidation of the corresponding 3-hydroxystilbenes and 3-hydroxyisoflavone led to conventional dienone oxidation products. The antitumour implications of these oxidation processes are briefly highlighted; the novel 4-substituted phenolic oxidation products were found to be
描述了用于高价碘介导的含有扩展的共轭π-系统的生物活性酚的氧化的新反应途径。使用基于碘的高价氧化剂在甲醇中氧化4-羟基对苯二酚会导致甲氧基在中央二苯乙烯双键上进行正式的1,2-加成反应。用二(三氟乙酰氧基)碘苯处理结构上相关的4-羟基异黄酮导致令人惊讶地形成2,4'-二羟基苯甲醚。讨论了这些新反应途径的潜在机制,并介绍了2,4'-二羟基苯甲醚的X射线晶体结构。相反,相应的3-羟基对苯二酚和3-羟基异黄酮的氧化导致常规的二烯酮氧化产物。这些氧化过程的抗肿瘤作用简述如下: