Water as a Direct Proton Source for Asymmetric Hydroarylation Catalyzed by a Rh(I)–Diene: Access to Nonproteinogenic β<sup>2</sup>/γ<sup>2</sup>/δ<sup>2</sup>-Amino Acid Derivatives
作者:Jian-Ping Chen、Yi Li、Chao Liu、Tianyi Wang、Lung Wa Chung、Ming-Hua Xu
DOI:10.1021/acs.orglett.0c04099
日期:2021.1.15
A highly enantioselective rhodium-catalyzed intermolecular hydroarylation of α-aminoalkyl acrylates using water as a direct proton source has been realized by employing a chiral bicyclo[3.3.0] diene ligand, allowing efficient access to a broad range of α-aryl-methyl-substituted β2-, γ2-, and δ2-amino esters with excellent enantioselectivities (up to 98% ee) under exceptionally mild conditions. By utilizing
A Rh/Pd/Cu catalyst system led to an efficient synthesis of dihydroquinolinones in one-pot, two operations. The reaction features the first triple metal-catalyzed transformations in one reaction vessel, without any intermediate workup. The conjugate-addition/amidation/amidation reaction sequence is highly modular, divergent, and practical.