Copper-Catalyzed Intermolecular Aminoazidation of Alkenes
作者:Bo Zhang、Armido Studer
DOI:10.1021/ol500513b
日期:2014.3.21
Copper-catalyzedintermolecular aminoazidation of alkenes is described. This novel methodology provides an efficient approach to vicinal amino azides which can easily be transformed into other valuable amine derivatives. The commercially available N-fluorobenzenesulfonimide (NFSI) is used as a nitrogen-radical precursor and TMSN3 as the N3 source. Yields are moderate to excellent, and for internal
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.
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