作者:Chunmei Gao、Derong Cao、Sheyang Xu、Herbert Meier
DOI:10.1021/jo0526791
日期:2006.4.1
quantitative yields. Since the starting compounds are easily accessible from 9(10H)-anthracenone, this process represents the most facile route to such pentacyclic systems. An electron-releasing methoxy group enables the intramolecular electrophilic substitution in its para position. In the absence of such an activation, a number of alternative processes can occur, namely the acid-catalyzed dehydration to anthracene
在苯环中具有高电子密度的10-苄基-9,10-二氢蒽基-9-ols在酸存在下以几乎定量的产率显示出与相应的同三联体的环过环的闭合。由于起始化合物很容易从9(10 H)-蒽酮获得,因此该方法代表了通往此类五环系统的最简便方法。释放电子的甲氧基能够在其对位进行分子内亲电取代。在没有这种活化的情况下,会发生许多替代过程,即酸催化脱水成蒽衍生物,其中(R≠H)或不进行(R = H)重排或仲醇歧化成相应的酮和碳氢化合物。