Copper(I)–N-Heterocyclic Carbene Complexes as Efficient Catalysts for the Synthesis of 1,4-Disubstituted 1,2,3-Sulfonyltriazoles in Air
作者:Faïma Lazreg、Catherine S. J. Cazin
DOI:10.1021/acs.organomet.7b00506
日期:2018.3.12
Bis-NHC and mixed NHC/PR3 copper(I) complexes (NHC = N-heterocyclic carbene) were found to be efficientcatalysts enabling the azide–alkyne cycloaddition reaction leading to the formation of 1,2,3-sulfonyltriazoles under Click conditions. The mechanism of this transformation was probed and decoordination of the NHC ligand (even in the NHC/PR3 mixed ligand systems) during the catalytic transformation
Copper(i) complexes as catalysts for the synthesis of N-sulfonyl-1,2,3-triazoles from N-sulfonylazides and alkynes
作者:Israel Cano、M. Carmen Nicasio、Pedro J. Pérez
DOI:10.1039/b912835b
日期:——
The well-defined complex [Tpm*,BrCu(NCMe)]BF4 efficiently catalyses the [3+2] cycloaddition between alkynes and N-sulfonylazides under mild conditions, with conversions comparable to others obtained with in situ generated catalytic systems previously described for this transformation.
Nickel-Catalyzed Coupling of <i>N</i>-Sulfonyl-1,2,3-triazole with <i>H</i>-Phosphine Oxides: Stereoselective and Site-Selective Synthesis of α-Aminovinylphosphoryl Derivatives
nickel-catalyzed coupling of N-sulfonyl-1,2,3-triazole with various H-phosphine oxides for the construction of C(sp2)–P bonds is established. This unexpected reaction proceeds through a formal nickel-bound ketenimine pathway, representing a previously unknown 1,2-reactivity type of an azavinyl carbene. The method provides an efficient approach to the stereoselective and site-selective synthesis of α-aminovinylphosphoryl
Synthesis of Pyrazines from Rhodium-Catalyzed Reaction of 2<i>H</i>-Azirines with <i>N</i>-Sulfonyl 1,2,3-Triazoles
作者:Taekyu Ryu、Yonghyeon Baek、Phil Ho Lee
DOI:10.1021/acs.joc.5b00036
日期:2015.2.20
An efficient synthetic route to a wide range of trisubstituted pyrazines is developed from Rh-catalyzed reaction of 2H-azirines with N-sulfonyl-1,2,3-triazoles through the elimination of nitrogen molecule and arylsulfinic acid. The present reaction proceeds through formation of in situ generated dihydropyrazines.