A remarkable bioinspired EDDA-mediated method for the selective construction of biologically interesting and highly strained bridged methanodibenzo[b,f][1,5]dioxocin flavonoid scaffold was uncovered by starting from a variety of readily available acylphloroglucinol and 2-hydroxycinnamaldehyde substrates. This method merges a fascinating olefin isomerization/hemiacetallization/dehydration/[3 + 3]-type
通过从各种容易获得的酰基
间苯三酚和
2-羟基肉桂醛底物开始,发现了一种出色的受
生物启发的E
DDA介导的方法,该方法可选择性地构建
生物学上有趣的高桥连的
甲烷二苯并[ b,f ] [1,5]二恶英类
黄酮支架。该方法合并了一个迷人的烯烃异构化/
半缩醛化/脱
水/ [3 + 3]型环加成级联反应,该反应由原位生成的
铬鎓中间体驱动,为有效地获得此类类黄
酮类似物提供了方便且可行的合成策略。