A novel total synthesis of isocryptolepine based on a microwave-assisted tandem Curtius rearrangement and aza-electrocyclic reaction
作者:Kaori Hayashi、Tominari Choshi、Kyoko Chikaraishi、Aimi Oda、Rikako Yoshinaga、Noriyuki Hatae、Minoru Ishikura、Satoshi Hibino
DOI:10.1016/j.tet.2012.03.055
日期:2012.6
A new entry to the total synthesis of isocryptolepine (cryptosanguinolentine), isolated from Cryptolepis sanguinolenta, was achieved by constructing a tetracyclic ring system through a microwave-assisted tandem Curtius rearrangement and electrocyclic reaction of an aza 6π-electron system. The tetracyclic lactam was converted to isocryptolepine in a four-step sequence.
通过微波辅助串联库尔修斯重排和aza6π电子系统的电环反应构建四环系统,从而实现了从Cryptolepis sanguinolenta分离出的异隐油菜碱(cryptosanguinolentine)的总合成的新途径。以四步顺序将四环内酰胺转化为异隐油平。