N -Methylimidazolium perchlorate as a new ionic liquid for the synthesis of bis(pyrazol-5-ol)s under solvent-free conditions
摘要:
N-Methylimidazolium perchlorate ([MIm]ClO4) was synthesized and some of its physico-chemical properties, such as density, surface tension were investigated. A thermo gravimetric analysis (TGA) and solvent performance were also studied. The results show that this ionic liquid is an excellent catalyst for the synthesis of 4,4'-(arylmethylene)bis(1H-pyrazol-5-ol) derivatives under solvent-free conditions. This method has the advantages of high yield, clean transformation, simple operation and short reaction time. The ionic liquid can be recycled without significant loss of activity. (C) 2015 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
Ionic Liquid-Based Routes to Conversion or Reuse of Recycled Ammonium Perchlorate
作者:David B. Cordes、Marcin Smiglak、C. Corey Hines、Nicholas J. Bridges、Meghna Dilip、Geetha Srinivasan、Andreas Metlen、Robin D. Rogers
DOI:10.1002/chem.200901217
日期:2009.12.14
organic imidazolium‐ and phosphonium‐based perchlorate salts/ionic liquids have been synthesized by simple, inexpensive, and nonhazardous methods, using ammonium perchlorate as the perchlorate source. By appropriate choice of the cation, perchlorate can be incorporated into an ionic liquid which serves as its own electrolyte for the electrochemical reduction of the perchlorate anion, allowing for the regeneration
by NMR and mass spectrometric methods. X-ray crystal structures have been determined for potassium tetrakis(4-phenoxyphenyl)borate (K(+)1), N-methylpyridinium tetrakis(4-phenoxyphenyl)borate (61), 1-ethyl-4-(methoxycarbonyl)pyridinium tetrakis(4-phenoxyphenyl)borate (71), tropylium tetrakis(4-phenoxyphenyl)borate (81), and imidazolium tetrakis(biphenyl)borate (92). The results show that borate derivatives
N -Methylimidazolium perchlorate as a new ionic liquid for the synthesis of bis(pyrazol-5-ol)s under solvent-free conditions
作者:Nader Ghaffari Khaligh、Sharifah Bee Abd Hamid、Salam J.J. Titinchi
DOI:10.1016/j.cclet.2015.07.027
日期:2016.1
N-Methylimidazolium perchlorate ([MIm]ClO4) was synthesized and some of its physico-chemical properties, such as density, surface tension were investigated. A thermo gravimetric analysis (TGA) and solvent performance were also studied. The results show that this ionic liquid is an excellent catalyst for the synthesis of 4,4'-(arylmethylene)bis(1H-pyrazol-5-ol) derivatives under solvent-free conditions. This method has the advantages of high yield, clean transformation, simple operation and short reaction time. The ionic liquid can be recycled without significant loss of activity. (C) 2015 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.