Summary of main observation and conclusion A rigid C2-symmetric chiral bipyridine ligand Z-bpy with a triptycene-like backbone was designed and synthesized from simple chemicals in a scalable route.Using this new liga...Summary of main observation and conclusion A rigid C2-symmetric chiral bipyridine ligand Z-bpy with a triptycene-like backbone was designed and synthesized from simple chemicals in a scalable route.Using this new ligand,copper(Ⅰ) catalyzed cyclopropanation of styrenes with commercial ethyl diazoacetate produced various corresponding cyclopropanes in high yields,diastereoselectivity and enantioselectivity up to 97% ee.展开更多
基金provided by the National Natural Science Foundation of China (Nos.21672168 and 21702157)China Postdoctoral Science Foundation (No.2017M623148)+1 种基金the National Postdoctoral Program for Innovative Talents (No.BX201600122)Key Laboratory Construction Program of Xi'an Municipal Bureau of Science and Technology (No.201805056ZD7CG40).
文摘Summary of main observation and conclusion A rigid C2-symmetric chiral bipyridine ligand Z-bpy with a triptycene-like backbone was designed and synthesized from simple chemicals in a scalable route.Using this new ligand,copper(Ⅰ) catalyzed cyclopropanation of styrenes with commercial ethyl diazoacetate produced various corresponding cyclopropanes in high yields,diastereoselectivity and enantioselectivity up to 97% ee.
