Synthesis of Pyrrolizidine, Indolizidine, and Quinolizidine Derivatives Using Ruthenium-Catalyzed Ring-Opening Metathesis and Ring-Closing Metathesis of Cycloalkene-ynes
作者:Hideaki Wakamatsu、Yoshihiro Sato、Reiko Fujita、Miwako Mori
DOI:10.1002/adsc.200600539
日期:2007.5.7
in good yield, which could be converted to a pyrrolizidine derivative. Furthermore, ROM-RCM of azabicyclo[2.2.1]heptene-ynes using the second-generation Grubbs’ catalyst was investigated. When an azabicycloheptene derivative was exposed to a catalytic amount of a ruthenium carbene complex, pyrrolizidine and indolizidine derivatives were obtained in good yields. The distribution of these products depends
使用第一代和第二代Grubbs催化剂证明了具有酯部分的环戊烯炔的开环易位和闭环易位(ROM-RCM)。当在室温下在乙烯气氛下在5摩尔%钌卡宾配合物的存在下进行环烯炔的反应时,ROM-RCM顺利进行,以高收率得到吡咯烷衍生物,可以将其转化为环戊烯衍生物。吡咯嗪核苷衍生物。此外,研究了使用第二代格鲁布斯催化剂的氮杂双环[2.2.1]庚烯-炔的ROM-RCM。当将氮杂双环庚烯衍生物暴露于催化量的钌卡宾配合物时,以良好的收率获得了吡咯烷定和吲哚并立定衍生物。这些产物的分布取决于炔烃上的取代基。当氮杂双环[2。如图1b所示,获得了作为主要产物的吡咯嗪核苷衍生物。尽管产率适中,但具有1b的氮杂双环[2.2.2]辛烯-炔的ROM-RCM提供了喹oli嗪衍生物20。