A Mild Dihydrobenzooxaphosphole Oxazoline/Iridium Catalytic System for Asymmetric Hydrogenation of Unfunctionalized Dialins
作者:Bo Qu、Lalith P. Samankumara、Shengli Ma、Keith R. Fandrick、Jean-Nicolas Desrosiers、Sonia Rodriguez、Zhibin Li、Nizar Haddad、Zhengxu S. Han、Keith McKellop、Scott Pennino、Nelu Grinberg、Nina C. Gonnella、Jinhua J. Song、Chris H. Senanayake
DOI:10.1002/anie.201408929
日期:2014.12.22
Air‐stable P‐chiral dihydrobenzooxaphosphole oxazoline ligands were designed and synthesized. When they were used in the iridium‐catalyzed asymmetric hydrogenation of unfunctionalized 1‐aryl‐3,4‐dihydronaphthalenes under one atmosphere pressure of H2, up to 99:1 e.r. was obtained. High enantioselectivities were also observed in the reduction of the exocyclic imine derivatives of 1‐tetralones.
设计并合成了空气稳定的对映体,其手性为二氢苯并恶唑磷恶唑啉配体。当它们在一个大气压H 2下用于铱催化的未官能化的1-芳基-3,4-二氢萘的铱催化不对称氢化反应时,可得到高达99:1的er。在1-丁酮的环外亚胺衍生物的还原反应中也观察到了高对映选择性。