A Facile Pathway to Enantiomerically Enriched 3-Hydroxy-2-Oxindoles: Asymmetric Intramolecular Arylation of α-Keto Amides Catalyzed by a Palladium-DifluorPhos Complex
作者:Liang Yin、Motomu Kanai、Masakatsu Shibasaki
DOI:10.1002/anie.201102158
日期:2011.8.8
Less metal wastes: The first catalytic, enantioselective intramolecular aryl‐transfer reaction of aryl triflates to ketones has been developed (see scheme; R1=R2=aromatic and aliphatic). This method features overall practicality, including substrate stability and accessibility (protecting‐group free) plus no need for the use of stoichiometric amounts of metals.
减少金属废料:已开发出芳基三氟甲磺酸酯向酮的第一个催化,对映选择性分子内芳基转移反应(参见方案; R 1 = R 2 =芳族和脂族)。该方法具有整体实用性,包括基材稳定性和可及性(无保护基团),而且无需使用化学计量的金属。