作者:Ravindra B. Pathak、Benjamin C. Dobson、Nandita Ghosh、Khalid A. Ageel、Madeha R. Alshawish、Rungroj Saruengkhanphasit、Iain Coldham
DOI:10.1039/c4ob02582b
日期:——
synthetic approach to the core structure of the manzamine alkaloids is reported, particularly in relation to incorporating a one-carbon unit in ring B from which the aldehyde in ircinal A or the beta-carboline unit in manzamine A could potentially be generated. The key steps involve a Johnson-Claisen rearrangement, enolate alkylation, dithiane alkylation and a stereoselective intramolecular dipolar cycloaddition
报道了一种有效的合成方法用于甘露糖胺生物碱的核心结构,特别是在环B中掺入一个碳单元时,可能会产生在兽类A中的醛或甘露糖胺A中的β-咔啉单元。关键步骤涉及Johnson-Claisen重排,烯醇烷基化,二噻烷烷基化和偶氮甲碱叶立德的立体选择性分子内偶极环加成反应,从而提供了所需的三环ABC核心结构。