reductive cyclization to furo[3,4-b]carbazolones on reaction with LiAlH4. One of the furocarbazolones is utilized to accomplish the first total synthesis of claulansine D and mafaicheenamine E in 9 and 6 steps respectively. The other key steps of the syntheses are addition of an allylic indium reagent and CC double bond isomerization.
1-羟基咔唑-2,3-二
羧酸酯已显示出在与LiAlH 4反应时发生
化学选择性还原环化反应生成
呋喃并[3,4- b ]
咔唑酮。利用
呋喃咔唑酮中的一种来分别完成9个步骤和6个步骤的克劳兰新D和马法拉敏E的首次全合成。合成的其他关键步骤是添加烯丙基
铟试剂和CC双键异构化。