Aryl Azides Formation Under Mild Conditions: A Kinetic Study in Some Ionic Liquid Solutions
作者:Francesca D’Anna、Salvatore Marullo、Renato Noto
DOI:10.1021/jo9022952
日期:2010.2.5
target reaction was also carried out in DMF solution at increasing concentration of NaN3 or [bmim][N3]. Data collected show that the reaction occurs faster in DMF than in ionic liquid solution. Furthermore, as a consequence of the ability of all solvent media to favor the leaving group departure, a simple linear dependence of the pseudo-first-order kinetic constant from nucleophile concentration was
Ionic Liquids/[bmim][N<sub>3</sub>] Mixtures: Promising Media for the Synthesis of Aryl Azides by S<sub>N</sub>Ar
作者:Francesca D’Anna、Salvatore Marullo、Renato Noto
DOI:10.1021/jo800676d
日期:2008.8.1
The nucleophilic aromatic substitution of some activated aryl or heteroaryl halides has been performed in ionic liquid solution, using the 1-butyl-3-methylimidazolium azide as a nucleophile. The reaction course was studied varying the structures of both substrates and ionic liquids. In particular, in the latter case, the reaction of 2-bromo-5-nitrothiophene was carried out in five different ionic liquids ([bmim][BF4], [bmim] [PF6], [bmim] [NTf2], [bm(2)im] [NTf2], and [bmpyrr] [NTf2]). Finally, for all the substrates considered, a comparison with data obtained in MeOH solution in the presence of NaN3 was also performed. Data collected indicate that in some cases it is possible to obtain aromatic or heteroaromatic azide derivatives in satisfactory yield by means of a SNAr reaction using [bmim][N-3] as the nucleophile.
VEGH, D.;KOVAC, J.;DANDAROVA, M., COLLECT. CZECH. CHEM. COMMUN., 1983, 48, N 7, 1885-1890
作者:VEGH, D.、KOVAC, J.、DANDAROVA, M.
DOI:——
日期:——
Synthesis of aryl azides: A probe reaction to study the synergetic action of ultrasounds and ionic liquids
作者:Francesca D’Anna、Salvatore Marullo、Paola Vitale、Renato Noto
DOI:10.1016/j.ultsonch.2011.06.010
日期:2012.1
The combined effect of ultrasounds and ionic liquids was used to perform the synthesis of aryl azides by nucleophilic aromatic substitution in ionic liquid/[1-butyl-3-methylimidazolium][N3] binary mixtures. The ultrasounds efficiency was analyzed as a function of the substrate and of the ionic liquid structure. In the first case, both 6π and 10π electrons aryl halides were considered. As far as the