Portal de Periódicos da CAPES

Ir/Cu Dual Catalysis: Enantio- and Diastereodivergent Access to α,α-Disubstituted α-Amino Acids Bearing Vicinal Stereocenters

2018; American Chemical Society; Volume: 140; Issue: 6 Linguagem: Inglês

10.1021/jacs.8b00187

1943-2984

Xiaohong Huo, Jiacheng Zhang, Jingke Fu, Rui He, Wanbin Zhang,

Asymmetric Hydrogenation and Catalysis

We describe a fully stereodivergent synthesis of a range of α,α-disubstituted α-amino acids via an Ir/Cu-catalyzed α-allylation of readily available imine esters. The introduction of a Cu-Phox complex-activated imine ester into the chiral iridium-catalyzed allylic allylation process is crucial for its high reactivity and excellent enantio- and diastereoselectivity (up to >99% ee and >20:1 dr). Importantly, the two chiral catalysts allow for full control over the configuration of the stereocenters, affording all stereoisomers of the desired products. The utility of this methodology was demonstrated by synthesizing dipeptides and analogues of bioactive molecules in a stereodivergent manner.