Copper-catalyzed cascade aminoalkynylation–oxidation of propargylic alcohols has been realized, sterospecifically providing an array of (Z)-2-amino conjugated enynals/enynones in good yields under mild conditions. This transformation involves a rare 1,3-alkynyl migration of propargylic alcohols and simultaneously forms C–C, C–N, and C═O bonds. Furthermore, (Z)-2-amino conjugated enynals were applied
Copper-Catalyzed Ring-Opening 1,3-Aminotrifluoromethylation of Arylcyclopropanes
作者:Huan Zhang、Haiwen Xiao、Feng Jiang、Yewen Fang、Lin Zhu、Chaozhong Li
DOI:10.1021/acs.orglett.1c00390
日期:2021.3.19
(bpy)Zn(CF3)2 (bpy = 2,2′-bipyridine) at room temperature affords the corresponding ring-opening 1,3-aminotrifluoromethylation products in satisfactory yields. The protocol is highly regioselective, providing a convenient entry to γ-trifluoromethylated amines. A mechanism involving the trifluoromethylation of benzyl radicals is proposed.
The investigation of fluorination reaction of p-substituted benzenesulfonimides with fluorine–nitrogen mixed gas to synthesize NFSI analogues
作者:Guanlong Chen、Fuli Chen、Yan Zhang、Xueyan Yang、Xiaoming Yuan、Fanhong Wu、Xianjin Yang
DOI:10.1016/j.jfluchem.2011.10.012
日期:2012.1
This paper studied the fluorination reaction of p-substituted benzenesulfonimides with diluted elemental fluorine to synthesize N-fluoro-benzenesulfonimide (NFSI) analogues. Several synthetic methods were compared and we found that, for many p-substituted benzenesulfonimides, the fluorination of their sodium salts with 10% F-2-N-2 mixed gas in acetonitrile at room temperature could afford NFSI analogues in moderate to good yields. (C) 2011 Elsevier B.V. All rights reserved.