Hf(OTf)<sub>4</sub>-Doped Me<sub>3</sub>SiCl-Catalyzed Aminomethylation of Arenes with <i>N</i>,<i>O</i>-Acetals: Facile Approach to Non-Natural Aromatic Amino Acid Precursors
The authors demonstrated a Hf(OTf)4-Me3SiCl-system-catalyzed aminomethylation of an aromatic compound, such as a heterocycle or an electron-rich arene, with several new types of N,O-acetals having both a cyano group and a cyclic amino moiety. This method permits the facile synthesis of artificial aromatic amino acid precursors.
Development of a Rapid, Room-Temperature Dynamic Kinetic Resolution for Efficient Asymmetric Synthesis of α-Aryl Amino Acids
作者:Jianfeng Hang、Hongming Li、Li Deng
DOI:10.1021/ol026660l
日期:2002.9.1
rapid, highly efficient and general dynamickineticresolution (DKR) of racemic alpha-aryl UNCAs with the dual-function catalysis of modified cinchona alkaloid was accomplished at room temperature. This DKR led to the development of a highly enantioselective catalytic method for the practical synthesis of a wide range of alpha-aryl and alpha-heteroaryl amino acids in 89-92% ee and 86-95% yield from