作者:Takumi Abe、Toshiaki Ikeda、Reiko Yanada、Minoru Ishikura
DOI:10.1021/ol201107a
日期:2011.7.1
The concise total synthesis of calothrixins A and B has been accomplished by utilizing the one-pot formation of hexatriene as a key intermediate via the palladium-catalyzed tandem cyclization/cross-coupling reaction of triethyl(indol-2-yl)borate. In another key transformation, the indolo[3,2-j]phenanthridine core was prepared in high yield via Cu(I)-mediated 6π-electrocyclization.
通过利用一锅法形成的六三烯作为关键中间体,通过钯催化的三乙基(吲哚-2-基)硼酸酯的串联环化/交叉偶联反应,完成了杯丝藻毒素A和B的简明全合成。在另一个关键的转变中,吲哚并[3,2- j ]菲啶核是通过Cu(I)介导的6π电环化反应高产率制备的。