Formal total synthesis of the PKC inhibitor, balanol: preparation of the fully protected benzophenone fragment
作者:Bolette Laursen、Marie-Pierre Denieul、Troels Skrydstrup
DOI:10.1016/s0040-4020(02)00096-0
日期:2002.3
The synthesis of a perbenzylated derivative of balanol's highly functionalized benzophenone fragment is reported employing a regioselective Heck reaction as the key step for the connection of the two aromatic rings. The intermediate 7-membered lactone obtained, is subsequently opened and then subjected to an oxidative degradation, resulting in a short synthesis of the benzophenone unit. As the benzophenone
据报道,使用区域选择性Heck反应作为连接两个芳环的关键步骤,合成了Balanol高度官能化的二苯甲酮片段的过苄基化衍生物。随后打开所获得的中间体7元内酯,然后进行氧化降解,导致二苯甲酮单元的短合成。由于二苯甲酮以前已成功地用于合成巴拉诺醇,因此我们的工作构成了该天然产物的正式全合成。还尝试通过在芳基醛上的类似Heck的偶联或由SmI 2促进的酮基自由基环化来提供该片段的其他直接进入。