Copper-Catalyzed Diastereoselective and Enantioselective Addition of 1,1-Diborylalkanes to Cyclic Ketimines and α‑Imino Esters
datasetposted on 2019-08-19, 16:48 authored by Jeongho Kim, Minkyeong Shin, Seung Hwan Cho
We report broadly applicable copper catalytic conditions for the diastereoselective and enantioselective 1,2-addition of 1,1-diborylalkanes to cyclic ketimines and α-imino esters. The developed method provides various β-aminoboronate esters bearing adjacent stereocenters with high diastereo- and enantioselectivity. Synthetic applications for converting the obtained β-aminoboronate esters to a diverse array of synthetically useful chiral compounds are demonstrated.