Synthesis of Glycosyl Chlorides and Bromides by Chelation Assisted Activation of Picolinic Esters under Mild Neutral Conditions
作者:Peng Wen、Christopher J. Simmons、Zhi-xiong Ma、Stephanie A. Blaszczyk、Paul G. Balzer、Wenjing Ye、Xiyan Duan、Hao-Yuan Wang、Dan Yin、Christopher M. Stevens、Weiping Tang
DOI:10.1021/acs.orglett.0c00078
日期:2020.2.21
formation of glycosyl chlorides and bromides from picolinic esters undermild and neutral conditions. Benchtop stable picolinic esters are activated by a copper(II) halide species to afford the corresponding products in high yields with a traceless leaving group. Rare β glycosyl chlorides are accessible via this route through neighboring group participation. Additionally, glycosyl chlorides with labile protecting