Scandium(III)‐Zeolites as New Heterogeneous Catalysts for Imino‐Diels–Alder Reactions
作者:Andrea Olmos、Benoit Louis、Patrick Pale
DOI:10.1002/chem.201103624
日期:2012.4.16
demonstrates the first zeolite‐catalyzed synthesis of piperidine derivatives, including peptidomimetics and indoloquinolizidine alkaloids. The approach developed utilizes a highly effective one‐pot reaction cascade, through imine formation and imino‐Diels–Alder reactions, promoted by scandium‐loaded zeolites as a heterogeneous catalyst. The methodology described benefits from very low catalyst loadings (≤5 mol %
这项研究证明了沸石催化的哌啶衍生物的首次合成,包括拟肽和吲哚并喹喔啉生物碱。所开发的方法通过形成亚胺和亚氨基Diels-Alder反应,通过scan载沸石作为非均相催化剂促进了高效的一锅反应级联反应。该方法从非常低的催化剂负载量(≤5摩尔%的Sc描述益处III),市售且容易获得的起始原料,和温和的反应条件。此外,Sc III沸石催化剂可轻松重复使用10次以上,而不会降低效率。