Enantioselective Syntheses of Tricyclic Benzimidazoles via Intramolecular Allylic Aminations with Chiral-Bridged Biphenyl Phosphoramidite Ligands
作者:Xiaoding Jiang、Xiangmeng Chen、Yongsu Li、Hao Liang、Yaqi Zhang、Xiaobo He、Bin Chen、Wesley Ting Kwok Chan、Albert S. C. Chan、Liqin Qiu
DOI:10.1021/acs.orglett.8b03640
日期:2019.2.1
The first iridium-catalyzed enantioselective intramolecular allylic aminations of benzimidazole-tethered allylic carbonates were developed, providing three classes of tricyclic benzimidazoles bearing a tertiary carbon stereogenic center in high yields and excellent enantioselectivities (up to 99% yield, 99% ee). Wide substrate scope, excellent catalytic efficiency and mild conditions rendered this