We developed neutral iridium catalysts with chiral spiro phosphine-carboxy ligands (SpiroCAP) for asymmetrichydrogenation of unsaturated carboxylic acids. Different from the cationic Crabtree-type catalysts, the iridium catalysts with chiral spiro phosphine-carboxy ligands are neutral and do not require the use of a tetrakis[3,5-bis(trifluoromethyl)phenyl]borate (BArF−) counterion, which is necessary
Highly enantioselective hydrogenation of α-oxy functionalized α,β-unsaturated acids catalyzed by a ChenPhos–Rh complex in CF<sub>3</sub>CH<sub>2</sub>OH
作者:Lin Yao、Jialin Wen、Shaodong Liu、Renchang Tan、Noel Marie Wood、Weiping Chen、Shengyong Zhang、Xumu Zhang
DOI:10.1039/c5cc09089j
日期:——
A Chenphos–Rh complex is demonstrated to be a highly efficient catalyst for asymmetric hydrogenation of α-oxy functionalized α,β-unsaturated carboxylic acidsviaan ionic interaction between the ligand and the substrate.