Superbase-derived protic ionic liquids with chelating fluorinated anions
摘要:
Eighteen new protic ionic liquids were synthesized in one step from five organic superbases and five commercially available fluorinated beta-diketones. Physical properties of the ionic liquids, including thermal decomposition temperature were determined. Nine of the ionic liquids were examined as extraction media for La3+, with some very large distribution coefficients obtained. (C) 2011 Elsevier Ltd. All rights reserved.
Superbase-derived protic ionic liquids with chelating fluorinated anions
摘要:
Eighteen new protic ionic liquids were synthesized in one step from five organic superbases and five commercially available fluorinated beta-diketones. Physical properties of the ionic liquids, including thermal decomposition temperature were determined. Nine of the ionic liquids were examined as extraction media for La3+, with some very large distribution coefficients obtained. (C) 2011 Elsevier Ltd. All rights reserved.
A highly efficient Pd(OAc)2/guanidine aqueous system for the room temperature Suzuki cross-coupling reaction has been developed. The new water-soluble and air-stable catalyst Pd(OAc)2·(1f)2 from Pd(OAc)2 and 1,1,3,3-tetramethyl-2-n-butylguanidine (1f) was synthesized and characterized by X-ray crystallography. In the presence of Pd(OAc)2·(1f)2, coupling of arylboronic acids with a wide range of aryl
An ionic liquid based on a cyclic guanidinium cation is an efficient medium for the selective oxidation of benzyl alcohols
作者:Haibo Xie、Suobo Zhang、Haifeng Duan
DOI:10.1016/j.tetlet.2003.12.141
日期:2004.2
prepared containing a cyclic hexaalkylguanidinium cation. The selectiveoxidation of a series of substituted benzyl alcohols has been carried out in it, with sodiumhypochlorite as the oxidant. The RTIL acts as both phase transfer catalyst (PTC) and solvent. The ionic liquid could be recycled after extraction of the benzaldehyde product with ether.
Guanidines were proved to be efficient catalysts for the chemical fixation of carbon dioxide with 2-aminobenzonitriles under solvent-free conditions. Notably, the catalysts with low loading worked well for a variety of 2-aminobenzonitriles. As a result, quinazoline-2,4(1H, 3H)-diones by employing present protocol were obtained in good yields under mild conditions. This process represents an alternative approach for the greener chemical fixation of CO2 to afford valuable compounds. (C) 2010 Elsevier Ltd. All rights reserved.
Superbase-derived protic ionic liquids with chelating fluorinated anions
作者:Jason R. Bell、Huimin Luo、Sheng Dai
DOI:10.1016/j.tetlet.2011.05.037
日期:2011.7
Eighteen new protic ionic liquids were synthesized in one step from five organic superbases and five commercially available fluorinated beta-diketones. Physical properties of the ionic liquids, including thermal decomposition temperature were determined. Nine of the ionic liquids were examined as extraction media for La3+, with some very large distribution coefficients obtained. (C) 2011 Elsevier Ltd. All rights reserved.