Toward General Access to the <i>Aspidosperma</i>-Type Terpenoid Indole Alkaloids: Synthesis of the Key 3,3-Disubstituted Piperidones through Enantioselective Intramolecular Heck-Type Reaction of Chloroformamides
作者:Yoshizumi Yasui、Hiroshi Takeda、Yoshiji Takemoto
DOI:10.1248/cpb.56.1567
日期:——
An enantioselective intramolecular Heck-type reaction of chloroformamides has been developed for the synthesis of 3,3-disubstituted piperidones. The desired piperidone was formed in the presence of a palladium catalyst, an optically active phosphoramidite ligand, K3PO4 and Ag3PO4. The obtained piperidone was converted to epieburnamonine.
开发了一种用于合成3,3-二取代哌啶酮的内型不对称分子内氯甲酰胺 Heck 反应。在钯催化剂、光学活性膦酰胺配体、K3PO4 和 Ag3PO4 存在下,生成了所需的哌啶酮。所得哌啶酮被转化为表厄巴马翁。