Aza-Belluš-Claisen Rearrangement-Enabled Synthesis of Racemic Tapentadol and Its Stereoisomers
作者:Donghu Bai、Sha-Hua Huang、Zuming Lin、Lin Yang、Junzeng Dai、Meng-Yuan Huang、Xueshun Jia、Ran Hong
DOI:10.1002/cjoc.201300081
日期:2013.3
A concise synthesis of racemic Tapentadol and its stereoisomers was presented. The key step was a TiCl4·THF2‐catalzyed aza‐Belluš‐Claisen rearrangement to create two vicinal tertiary carbon stereogenic centers. The subsequent reduction of amide and hydrogenation of alkene delivered Tapentadol and its stereoisomers. The current approach offers a practical synthetic route to access this class of pharmaceutically
介绍了外消旋他喷他多及其立体异构体的简明合成方法。关键步骤是TiCl 4 ·THF 2-过氧化的氮杂-Belluš-Claisen重排,以创建两个相邻的叔碳立体异构中心。随后的酰胺还原和烯烃的氢化反应产生了他喷他多及其立体异构体。当前的方法提供了一种实用的合成途径来接近这类具有药学意义的分子。