Chiral Hetero- and Carbocyclic Compounds from the Asymmetric Hydrogenation of Cyclic Alkenes
作者:J. Johan Verendel、Jia-Qi Li、Xu Quan、Byron Peters、Taigang Zhou、Odd R. Gautun、Thavendran Govender、Pher G. Andersson
DOI:10.1002/chem.201104073
日期:2012.5.21
Several types of chiral hetero‐ and carbocyclic compounds have been synthesized by using the asymmetric hydrogenation of cyclic alkenes. N,P‐Ligated iridium catalysts reduced six‐membered cyclic alkenes with various substituents and heterofunctionality in good to excellent enantioselectivity, whereas the reduction of five‐membered cyclic alkenes was generally less selective, giving modest enantiomeric
通过使用环状烯烃的不对称氢化,已经合成了几种类型的手性杂环和碳环化合物。N,P连接的铱催化剂将具有各种取代基和杂官能团的六元环烯烃还原为良好至优异的对映选择性,而五元环烯烃的还原通常选择性较低,给出适度的对映异构体过量。氢化的立体选择性在很大程度上取决于五元环烯烃而不是六元环烯烃的底物结构。六元烯烃还原反应中形成的主要对映异构体可通过选择性模型预测,异构体烯烃具有互补的对映选择性,氢化后可得到相反的旋光异构体。顺式环己烷羧酸盐。