Synthesis of Electronically Deficient Atropisomeric Bisphosphine Ligands and Their Application in Asymmetric Hydrogenation of Quinolines
作者:Min-Can Wang、Yong-Gui Zhou、De-Yang Zhang、Duo-Sheng Wang、Chang-Bin Yu、Kai Gao
DOI:10.1055/s-0030-1260129
日期:2011.9
atropisomeric bisphosphine ligands have been synthesized from (S)-MeO-BiPhep. The introduction of electron-withdrawing groups in the ligands had a dramatic influence on both the enantioselectivity and the activity of catalyst. The iridium complex of the MeO-BiPhep-based ligand bearing a trifluoromethanesulfonyl group was successfully applied in the asymmetric hydrogenation of quinolines with ee values of up
从(S)-MeO-BiPhep合成了一系列电子缺陷的阻转异构双膦配体。配体中吸电子基团的引入对催化剂的对映选择性和活性均具有显着影响。具有三氟甲磺酰基的MeO-BiPhep基配体的铱配合物已成功应用于ee值高达95%和周转数(TON)高达14,600的喹啉的不对称氢化中。 铱-不对称氢化-缺电子配体-喹啉