Synthesis of a Chiral Quaternary Carbon Center Bearing a Fluorine Atom: Enantio- and Diastereoselective Guanidine-Catalyzed Addition of Fluorocarbon Nucleophiles
作者:Zhiyong Jiang、Yuanhang Pan、Yujun Zhao、Ting Ma、Richmond Lee、Yuanyong Yang、Kuo-Wei Huang、Ming Wah Wong、Choon-Hong Tan
DOI:10.1002/anie.200900964
日期:2009.5.4
The perfect combination: The title reaction provides adducts having quaternary carbon centers bearing a fluorine atom with high ee and d.r. values (see scheme). The mechanism and origin of stereoselectivity were elucidated by DFT calculations. The bifunctional mode of the guanidine catalysis was demonstrated in the transition states resulting from the DFT results.
完美的组合:标题反应可提供带有带有高ee和dr值的氟原子的季碳中心的加合物(参见方案)。通过DFT计算阐明了立体选择性的机理和起源。在DFT结果导致的过渡态中证明了胍催化的双功能模式。