Ionic Liquid Promoted Diazenylation of <i>N</i>-Heterocyclic Compounds with Aryltriazenes under Mild Conditions
作者:Dawei Cao、Yonghong Zhang、Chenjiang Liu、Bin Wang、Yadong Sun、Ablimit Abdukadera、Haiyan Hu、Qiang Liu
DOI:10.1021/acs.orglett.6b00605
日期:2016.5.6
aryltriazenes using Brønsted ionicliquid as a promoter has been developed for the first time. Many N-heterocyclic azo compounds were synthesized in good to excellent yields at roomtemperature under an open atmosphere. Notably, the promoter 1,3-bis(4-sulfobutyl)-1H-imidazol-3-ium hydrogen sulfate could be conveniently recycled and reused with the same efficacies for at least four cycles.
The acid decomposition of 1-aryl-3,3-dialkyltriazenes. Mechanistic changes as a function of aromatic substitution, nucleophile strength, and solvent
作者:Jorge R. Barrio、Nagichettiar Satyamurthy、Hao Ku、Micheal E. Phelps
DOI:10.1039/c39830000443
日期:——
Solvent, nucleophilestrength, and substituents on the phenyl ring modified the yeild of aromatic halogenation using 1-aryl-3,3-dialkyltriazenes (2a–f) and halid ion in anhydrous acidic media.
Catalytic conversion of aryl triazenes into aryl sulfonamides using sulfur dioxide as the sulfonyl source
作者:Wanfang Li、Matthias Beller、Xiao-Feng Wu
DOI:10.1039/c4cc03481c
日期:——
Gaseous sulfur dioxide was incorporated into triazenes to form various sulfonamides, catalyzed by boron trifluoride and copper chloride.
气态二氧化硫在三氮烯中被催化剂三氟化硼和氯化铜催化形成各种磺胺类化合物。
Synthesis of Triazenes with Nitrous Oxide
作者:Gregor Kiefer、Tina Riedel、Paul J. Dyson、Rosario Scopelliti、Kay Severin
DOI:10.1002/anie.201408597
日期:2015.1.2
drugs. Here, we describe a new method for the synthesis of triazenes. The procedure involves a reagent which is rarely used in synthetic organic chemistry: nitrousoxide (N2O, “laughing gas”). Nitrousoxide mediates the coupling of lithium amides and organomagnesium compounds while serving as a nitrogen donor. Despite the very inert character of nitrousoxide, the reactions can be performed in solution
A highly efficient palladium-catalyzed arylation of azoles at the C2-position using 1-aryltriazenes as aryl reagents was developed. Azoles including oxazoles, thiazoles, imidazoles, 1,3,4-oxadiazoles, and oxazolines could react with 1-aryltriazenes smoothly to generate the corresponding products in good to excellent yields, and various substitution patterns were tolerated toward the reaction.