An expeditious solvent-free route to ionic liquids using microwaves
作者:Rajender S. Varma、Vasudevan V. Namboodiri
DOI:10.1039/b101375k
日期:——
A microwave-assistedpreparation of a series of ambient temperature ionicliquids, 1-alkyl-3-methylimidazolium (AMIM) halides, that proceeds via efficient reaction of 1-methylimidazole with alkyl halides/terminal dihalides under solvent-free conditions, is described.
Synthesis and properties of N,N′-dialkylimidazolium bis(nonafluorobutane-1-sulfonyl)imides: a new subfamily of ionic liquids
作者:Ser Kiang Quek、Ilya M. Lyapkalo、Han Vinh Huynh
DOI:10.1016/j.tet.2006.01.015
日期:2006.3
derivatives with various readily available alkylating reagents, followed by anion exchange with highly stable and non-hygroscopic potassium bis(nonafluorobutane-1-sulfonyl)imide. The latter was obtained by an improved method starting from ammonium chloride and nonafluorobutane-1-sulfonyl fluoride. The quaternary imidazolium salts thus obtained constitute a new subfamily of thermally stable and remarkably
trans-(imidazol-2-ylidene)MCl4 complexes 4a–c (M=Zr) and 5a (M=Hf), respectively. These four Arduengo carbene-Group 4 metal halide complexes were characterized by X-ray diffraction. The pairs of carbene ligands are trans-positioned in a pseudo-octahedral coordination geometry at the Group 4 metals, and adopt a conformational orientation in the solid state where the two five-membered heterocycles are arranged
Solvent-Free Sonochemical Preparation of Ionic Liquids
作者:Vasudevan V. Namboodiri、Rajender S. Varma
DOI:10.1021/ol026608p
日期:2002.9.1
[GRAPHICS]An ultrasound-assisted preparation of a series of ambient-temperature ionic liquids, 1-alkyl-3-methylimidazolium (AMIM) halides, which proceeds via efficient reaction of 1-methyl imidazole with alkyl halides/terminal dihalides under solvent-free conditions, is described.
An ionic liquid {[secbmim]+ Br¯} as a “dual reagent catalyst” for the multicomponent synthesis of (quinolinyl- and isoquinolinyl- amino) alkylnaphthols, their bis- analogs and a facile route to naphthoxazines
作者:Chhanda Mukhopadhyay、Sunil Rana、Ray J Butcher
DOI:10.3998/ark.5550190.0011.a24
日期:——
An atom-economic methodology has been developed for the multi- component one–pot synthesis of (quinolinyl- and isoquinolinyl-amino) alkyl naphthols and their bis-analogs employing the ionicliquid [ sec bmim] + Br¯} as a “dualreagent catalysis” at 25 oC. The present approach possesses several advantages such as excellent yields, lower reaction times, mild reaction conditions, recyclability and