Chiral Phosphoric Acid Catalyzed Enantioselective Transfer Hydrogenation of ortho-Hydroxybenzophenone NH Ketimines and Applications
作者:Thanh Binh Nguyen、Qian Wang、Françoise Guéritte
DOI:10.1002/chem.201101694
日期:2011.8.22
Unprotected synthesis: The first enantioselective chiral phosphoric acid catalyzed transfer hydrogenation of unprotected ortho‐hydroxybenzophenone NH imines by using a Hantzsch ester as the hydrogen source afforded the corresponding chiral N,O‐unprotected ortho‐hydroxydiarylmethylamines in high yields with excellent enantioselectivities (see scheme).
未受保护的合成:第一对映选择性的手性磷酸催化的传递未受保护的氢化邻-hydroxybenzophenoneÑ ħ亚胺通过使用汉奇酯作为得到相应的手性氢源N,O -unprotected邻-hydroxydiarylmethylamines以高收率和优异的对映选择性(见方案)。