作者:Ana Dunja Mance、Branko Borovička、KreŠImir Jakopčić、Gordana Pavlović、Ivan Leban
DOI:10.1002/jhet.5570390205
日期:2002.3
catalyzed ring-opening reaction of the derived oxatricycloadduct. With a 5-methoxy group, in addition to the expected 5-methoxyisoindoline 3, the corresponding hydroxy derivative 5 was obtained. On the other hand a 5-nitro group changes the outcome of the reaction even more profoundly. Instead of the expected 5-nitroisoindoline 12, 5-nitro-substituted epoxy-isoindoline 6 submitted to ring-opening reaction
叔烯基糠胺的呋喃环中存在的甲氧基或硝基会改变分子内的[4 + 2]环加成反应和衍生的氧三环加合物的酸催化开环反应的预期结果。在具有5-甲氧基的情况下,除了预期的5-甲氧基异吲哚啉3之外,还获得了相应的羟基衍生物5。另一方面,5-硝基基团甚至更深刻地改变了反应的结果。代替预期的5-硝基异吲哚啉12,将5-硝基取代的环氧异吲哚啉6与氢溴酸和乙酸的混合物进行开环反应,得到溴取代的环氧化合物7,8,9的混合物和/或溴取代的异吲哚啉10和11。