A copper-catalyzed 1,3-aminothiocyanation of arylcyclopropanes with N-fluorobenzenesulfonimide (NFSI) and trimethylsilyl isothiocyanate (TMSNCS) has been developed for the first time, efficiently synthesizing a series of γ-aminothiocyanate derivatives in moderate to excellent yields from readily available substrates under mild conditions. The practicability of the reaction was demonstrated by gram-scale
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.
A facile approach for the synthesis of enantiopure γ-amino nitriles by copper-catalyzed aminocyanation of arylcyclopropanes is disclosed, which undergoes the highly enantioselective ring-opening reaction of cyclopropanes. The strategy utilizes N-fluorobenzenesulfonimide as nucleophilic nitrogen source as well as oxidant and trimethylsilyl cyanide as the other nucleophile, and it probably operates via
A copper-catalyzed 1,3-aminoalkynylation or 1,3-aminobromination of arylcyclopropane with N-fluorobenzenesulfonimide (NFSI) and trimethoxy[(trimethylsilyl)ethynyl]silane or LiBr have been successfully developed. Through this strategy, a wide range of γ-alkylnyl-/γ-bromino-γ-branched amine derivatives were efficiently synthesized in good yields under mild conditions.
Electrochemical‐induced 1,3‐oxohydroxylation of arylcyclopropanes
作者:Xuejin Huang、Jianhua Cai、Ye Zheng、Chunlan Song、Jiakun Li
DOI:10.1002/adsc.202301343
日期:2024.1.30
Herein, we present a method for electrochemical-induced 1,3-oxohydroxylation of arylcyclopropanes with H2O as the green oxygen source. This transformation offers a regioselective route to highly functionalized β-hydroxy ketones under oxidant- and metal-free conditions. Notably, this electrochemical approach features simple operation, good regioselectivity, high functional group tolerance, and easy
在此,我们提出了一种以 H 2 O 作为绿色氧源电化学诱导芳基环丙烷 1,3-氧代羟基化的方法。这种转化为在无氧化剂和无金属条件下制备高度功能化的β-羟基酮提供了一条区域选择性途径。值得注意的是,该电化学方法具有操作简单、区域选择性好、官能团耐受性高、产物易于衍生化等特点。机理研究提供了确凿的证据,证明 1,3-二醇是该反应中的关键中间体,导致观察到的区域选择性。