Copper-Catalyzed Radical Aminotrifluoromethylation of Alkenes
作者:Haiwen Xiao、Haigen Shen、Lin Zhu、Chaozhong Li
DOI:10.1021/jacs.9b06141
日期:2019.7.24
We report herein an unprecedented protocol for aminotrifluoromethylation of alkenes. With Cu(OTf)2 as the catalyst, the reaction of alkenes, (bpy)Zn(CF3)2 and N-fluorobis(benzenesulfonyl)imide (NFSI) at room temperature provides the corresponding aminotrifluoromethylation products in satisfactory yields with high regioselectivity opposite to those driven by CF3 radical addition. The method exhibits
8-Endo Cyclization of (Alkoxycarbonyl)methyl Radicals: Radical Ways for Preparation of Eight-Membered-Ring Lactones
作者:Eun Lee、Cheol Hwan Yoon、Tae Hee Lee、Sun Young Kim、Tae Joon Ha、Yong-suk Sung、Sang-Hyun Park、Sangyoub Lee
DOI:10.1021/ja980908d
日期:1998.8.1
Cyclization of (alkoxycarbonyl)methyl radicals generated from bromoacetates proceeds in the 8-endo mode to generate heptanolactones. Three distinct types of 8-endo/5-exo tandem radical cyclizations produce different bicyclic heptanolactones. In certain cases, intramolecularfree-radical attack on the heptanolactone carbonyl group initiates further skeletal rearrangement. Ab initio calculations indicate