Structure Elucidation and Chiral-Total Synthesis of a New Indole Alkaloid, (−)-9-Methoxymitralactonine, Isolated from Mitragyna speciosa in Malaysia
作者:Hiromitsu Takayama、Mika Kurihara、Mariko Kitajima、Ikram M. Said、Norio Aimi
DOI:10.1016/s0040-4020(00)00235-0
日期:2000.5
A new Corynanthe-type indole alkaloid, (−)-9-methoxymitralactonine (1), having a highly conjugated system was isolated from the young leaves of Mitragyna speciosa in Malaysia, and its structure was first deduced by spectroscopic analysis and then confirmed by chiral-total synthesis starting from optically pure epoxy-ketone and 5-methoxy-3,4-dihydro-β-carboline. The chiral HPLC analysis demonstrated
从马来西亚Mitragyna speciosa的幼叶中分离出一种新的具有高共轭体系的新的Corynanthe型吲哚生物碱(-)-9-甲氧基mitalactonine(1),首先通过光谱分析推导其结构,然后通过手性法对其进行确认。 -从光学纯的环氧酮和5-甲氧基-3,4-二氢-β-咔啉开始的全合成。手性HPLC分析表明,相对于(+)-对映体,天然9-甲氧基二氢内酰胺主要以(62):38的比例包含(-)-对映体。