Fluorinated Aromatic Ketones as Nucleophiles in the Asymmetric Organocatalytic Formation of CC and CN Bonds: A Facile Route to the Construction of Fluorinated Quaternary Stereogenic Centers
作者:Yujun Zhao、Yuanhang Pan、Hongjun Liu、Yuanyong Yang、Zhiyong Jiang、Choon‐Hong Tan
DOI:10.1002/chem.201003761
日期:2011.3.21
Highly enantioselective Mannich and α‐amination reactions have been successfully developed using α‐fluorinated aromaticketones as fluorocarbon nucleophiles in the presence of a bicyclic chiral guanidine (see scheme; Ms=methanesulfonyl). This method is a simple and efficient approach to the construction of fluorinated quaternary stereogenic centers.
在双环手性胍存在下,使用α-氟化的芳族酮作为碳氟亲核试剂,已经成功开发出高度对映选择性的曼尼希和α-氨基化反应(参见方案; Ms =甲磺酰基)。该方法是构建氟化四元立体异构中心的一种简单有效的方法。
Photoinduced Promiscuity of Cyclohexanone Monooxygenase for the Enantioselective Synthesis of α‐Fluoroketones
The photoinduced reductive dehalogenation promiscuity of cyclohexanonemonooxygenase (CHMO) with a novel mechanism of ET/PT distinct from the photoinducedpromiscuity of natural reductases is reported. Various highly enantioenriched α-fluoroketones were synthesized by photoinduced reductive dehalogenation of α,α-halofluoroketones in a process catalyzed by the rationally designed CHMO mutants.