Rhodium-Catalyzed Asymmetric Addition of Organoboronic Acids to Aldimines Using Chiral Spiro Monophosphite-Olefin Ligands: Method Development and Mechanistic Studies
作者:Huanyu Shan、Qiaoxia Zhou、Jinglu Yu、Shuoqing Zhang、Xin Hong、Xufeng Lin
DOI:10.1021/acs.joc.8b01764
日期:2018.10.5
on a hexamethyl-1,1′-spirobiindane scaffold was accomplished starting from Bisphenol C. The optimal ligand could serve as an elegant chiral bidentate ligand in the Rh-catalyzed asymmetric 1,2-addition of organoboronic acids to various acyclic/cyclic aldimines, leading to chiral amines with high yields and excellent enantioselectivities. Detailed stereochemical models for enantioselective induction
Catalytic Enantioselective Addition of Phenylboronic Acid and Phenylboroxine to<i>N</i>-Tosylimines: Pd<sup>II</sup>and Rh<sup>I</sup>Catalysis
作者:Carolina S. Marques、Anthony J. Burke
DOI:10.1002/ejoc.200901139
日期:2010.3
This is the first account of a successful, Pd II -catalysed enantioselectiveaddition of phenylboronicacid to electron-deficient N-tosylarylimines by using chiral diphosphane ligands. A number of commercial diphosphane ligands were screened. Despite moderate to good yields, ee values of 99 % could be achieved with MeDuPhos. Novel Rh 1 catalysts were also screened, and ee values as high as 74 % could
这是首次使用手性二膦配体成功地将苯基硼酸对映选择性加成到缺电子的 N-甲苯磺酰亚胺中。筛选了许多商业二膦配体。尽管产量中等至良好,但使用 MeDuPhos 仍可实现 99% 的 ee 值。还筛选了新型 Rh 1 催化剂,可以获得高达 74% 的 ee 值。
Chiral Diphosphane- and NHC-Containing Ruthenium Catalysts for the Catalytic Asymmetric Arylation of Aldimines with Organoboron Reagents
作者:Carolina S. Marques、Anthony J. Burke
DOI:10.1002/ejoc.201200556
日期:2012.8
first time, we report the application of [RuCl2(η6-p-cymene)]2 in the arylation of N-activated aldimines with boronic acids and its derivatives to afford chiral amines, which are important intermediates in the syntheses of key bioactive compounds. The behavior of the chiral ligands, the imine substrates, and the organoboronreagents were studied. Very good enantioselectivities were obtained.
Exogenous-Base-Free Palladacycle-Catalyzed Highly Enantioselective Arylation of Imines with Arylboroxines
作者:Carmen Schrapel、René Peters
DOI:10.1002/anie.201501846
日期:2015.8.24
Enantiomerically pure benzylic amines are important for the development of new drugs. A readily accessible planar‐chiralferrocene‐derived palladacycle is shown to be a highly efficient catalyst for the formation of N‐substituted benzylic stereocenters; this catalyst accelerates the 1,2‐addition of arylboroxines to aromatic and aliphatic imines with exceptional levels of enantioselectivity. Using aldimines
Chiral benzene backbone-based sulfoxide-olefin ligands for highly enantioselective Rh-catalyzed addition of arylboronic acids to <i>N</i>-tosylarylimines
作者:Feng Xue、Qibin Liu、Yong Zhu、Yunfei Qing、Boshun Wan
DOI:10.1039/c9ra04836g
日期:——
An efficient Rh-catalyzedaddition of arylboronic acids to N-tosylarylimines has been developed with chiral benzene backbone-based sulfoxide-olefin ligands, where 2-methoxy-1-naphthyl sulfinyl functionalized olefin ligands have shown to be more effective. The versatile method tolerates a wide range of functional groups and shows broad scope without regard to electronic or steric substitution pattern
已经使用基于手性苯骨架的亚砜-烯烃配体开发了一种高效的 Rh 催化芳基硼酸加成到N-甲苯磺酰基亚胺,其中 2-甲氧基-1-萘基亚磺酰基官能化烯烃配体已显示更有效。这种通用方法可耐受多种官能团,并且在不考虑电子或空间取代模式的情况下显示出广泛的范围,允许以高产率(高达 99%)获得范围广泛的手性二芳基甲胺,并具有出色的对映选择性(高达 99% ee )。