A Phosphite-Pyridine/Iridium Complex Library as Highly Selective Catalysts for the Hydrogenation of Minimally Functionalized Olefins
作者:Javier Mazuela、Oscar Pàmies、Montserrat Diéguez
DOI:10.1002/adsc.201201017
日期:2013.9.16
library of readily available phosphite‐pyridine ligands has been successfully applied for the first time in the iridium‐catalyzed asymmetric hydrogenation of a broad range of minimallyfunctionalizedolefins. The modular ligand design has been shown to be crucial in finding highly selective catalytic systems for each substrate. Excellent enantioselectivities (ees up to 99%) have therefore been obtained
Adaptative Biaryl Phosphite-Oxazole and Phosphite-Thiazole Ligands for Asymmetric Ir-Catalyzed Hydrogenation of Alkenes
作者:Javier Mazuela、Alexander Paptchikhine、Oscar Pàmies、Pher G. Andersson、Montserrat Diéguez
DOI:10.1002/chem.200903350
日期:2010.4.19
library of readily available phosphite–oxazole/thiazole ligands (L1 a–g–L7 a–g) was applied in the Ir‐catalyzed asymmetrichydrogenation of several largely unfunctionalized E‐ and Z‐trisubstituted and 1,1‐disubstituted terminal alkenes. The ability of the catalysts to transfer chiral information to the product could be tuned by choosing suitable ligand components (bridge length, the substituents in the
一个易得的亚磷酸酯-恶唑/噻唑配体库(L1 a – g – L7 a – g)被用于Ir催化的几个未官能化的E和Z的不对称加氢反应中-三取代和1,1-二取代的末端烯烃。可以通过选择合适的配体组分(桥长,杂环和烷基主链上的取代基,配体主链的构型以及烯丙基中的取代基/构型)来调节催化剂将手性信息传递给产物的能力。亚磷酸亚芳基酯部分),因此可以根据需要使每种底物的对映选择性最大化。因此,对于多种E-和Z-三取代和1,1-二取代的末端烯烃,对映选择性极好(对映体过量(ee)值> 99%)。就底物的多功能性而言,亚磷酸亚芳基酯部分是非常有利的配体组分。
Expanded Scope of the Asymmetric Hydrogenation of Minimally Functionalized Olefins Catalyzed by Iridium Complexes with Phosphite-Thiazoline Ligands
作者:Javier Mazuela、Oscar Pàmies、Montserrat Diéguez
DOI:10.1002/cctc.201300189
日期:2013.8
We have replaced the oxazoline group with a thiazoline moiety in one of the most successful of the phosphite–oxazoline ligand families for the Ir‐catalyzedhydrogenation of minimallyfunctionalizedolefins. A small but structurally important library of Ir phosphite–thiazoline precatalysts (Ir‐L1–L2 a–e) has been developed by changing the substituents/configurations at the biaryl phosphite group. We
我们已经用噻唑啉部分取代了恶唑啉基团,这是亚磷酸酯-恶唑啉配体家族中最成功的一种,用于最小功能化烯烃的Ir催化加氢。通过改变亚磷酸联芳酯基团的取代基/构型,开发了一个小的但在结构上很重要的亚磷酸Ir-噻唑啉预催化剂库(Ir- L1 - L2 a - e)。我们发现在配体设计中用噻唑啉部分取代恶唑啉在底物范围方面是有益的。
Asymmetric Hydrogenation of Disubstituted, Trisubstituted, and Tetrasubstituted Minimally Functionalized Olefins and Cyclic β-Enamides with Easily Accessible Ir–P,Oxazoline Catalysts
We have developed a family of Ir–P,oxazoline catalysts for asymmetrichydrogenation. These catalysts, with a simple modular architecture, have shown a high tolerance to the olefin geometry and substitution pattern, and to the presence of several neighboring polar groups. Thus, they were able to successfully hydrogenate disubstituted, trisubstituted, and tetrasubstituted minimally functionalized olefins