NFSI-participated intermolecular aminoazidation of alkene through iron catalysis
作者:Bowen Lei、Xiaojiao Wang、Lifang Ma、Yan Li、Ziyuan Li
DOI:10.1039/c8ob00699g
日期:——
An iron-catalysed intermolecular vicinal aminoazidation of alkenes, using N-fluorobenzenesulfonimide (NFSI) and trimethylsilyl azide (TMSN3) as the imidating and azidating reagents, respectively, is described, which could potentially provide a valuable route toward diverse vicinal diamine derivatives of great significance in medicinal chemistry and organic synthesis. Such iron-catalysed aminative
Iron‐Catalyzed Radical Asymmetric Aminoazidation and Diazidation of Styrenes
作者:Daqi Lv、Qiao Sun、Huan Zhou、Liang Ge、Yanjie Qu、Taian Li、Xiaoxu Ma、Yajun Li、Hongli Bao
DOI:10.1002/anie.202017175
日期:2021.5.25
Asymmetric aminoazidation and diazidation of alkenes are straightforward strategies to build value‐added chiral nitrogen‐containing compounds from feedstock chemicals. They provide direct access to chiral organoazides and complement enantioselective diamination. Despite the advances in non‐asymmetric reactions, asymmetric aminoazidation or diazidation based on acyclic systems has not been previously
Acidic mesoporous Beta zeolite supported Cu (Cu/Beta-M) catalyst shows superior catalytic performance in the difunctionalization of styrenes with N-fluorobenzenesulfonimide (F-N(SO2Ph)(2)) and azidotrimethylsilane, compared with basic mesoporous ETS-10-M and acid-free Silicalite-1-M support Cu catalysts. The Bronsted acid, copper species and mesoporosity in the Cu/Beta-M catalyst jointly contribute to this reaction. The Cu/Beta-M catalyst can induce the chemisorption of the styrenes through interaction of C=C bond with the Bronsted acidic sites, promoting the activation of the C=C bond. Meanwhile, the Cu species in Cu/Beta-M can catalyze F-N (SO2Ph)(2) to transform into the -N(SO2Ph)(2) electrophile, which attacks the activated C=C bond of styrenes, leading to the catalyst with high activity and product selectivity. In addition, the styrenes with electron-donating groups have high electron density of the pi-conjugated system, which can strengthen the interaction of C=C bond with the Bronsted acidic sites, leading to the substrates with high reactivity.