A Unified Strategy To Construct the Tetracyclic Ring of Calyciphylline A Alkaloids: Total Synthesis of Himalensine A
作者:Jiaxin Zhong、Kuanwei Chen、Yuanyou Qiu、Haibing He、Shuanhu Gao
DOI:10.1021/acs.orglett.9b01184
日期:2019.5.17
total synthesis of himalensine A were described herein. Nitrone-induced 1,3-dipolar [3 + 2] cycloaddition was applied for the construction of A/C rings along with the all-carbon quaternary center. Pd-catalyzed enolate alkenylation and ring closing metathesis (RCM) were adopted to install the B/D rings to accomplish the [6,6,5,7] core framework. Nazarov reaction was utilized to install the F ring to complete
的合成方法来calyciphylline A型的核心框架虎皮生物碱和himalensine A的全合成这里描述了。硝基诱导的1,3-偶极[3 + 2]环加成反应用于A / C环以及全碳四元中心的构建。采用Pd催化的烯醇烯基化和闭环复分解(RCM)来安装B / D环,以完成[6,6,5,7]核心框架。利用纳扎罗夫(Nazarov)反应安装F环以完成海森碱A的全合成。