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
8-endo-Cyclization of (alkoxycarbonyl)methyl radicals generated from bromoacetates
作者:Eun Lee、Cheol Hwan Yoon、Tae Hee Lee
DOI:10.1021/ja00053a056
日期:1992.12
Hydrocarbon Oxidation vs C−C Bond-Forming Approaches for Efficient Syntheses of Oxygenated Molecules
作者:Kenneth J. Fraunhoffer、Daniel A. Bachovchin、M. Christina White
DOI:10.1021/ol047800p
日期:2005.1.1
[Reaction: see text] A hydrocarbon oxidation approach has been applied to the construction of several linear (E)-allylic alcohols that have served as intermediates in the synthesis of natural products and natural product-like molecules. In the original syntheses, these intermediates were constructed using a standard Wittig-type olefination approach. We report here that routes to these same intermediates