Sengupta, S. K.; Sahni, S. K.; Kapoor, R. N., Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1980, vol. 19, # 8, p. 810 - 812
Aromatic bromination of aldehydes and ketones using 1,3-di-n-butylimidazolium tribromide [BBIm]Br3 ionic liquids under solvent-free conditions
摘要:
An environmentally benign and efficient process for the preparation of monobromo derivatives of aryl aldehydes and ketones was developed by simple and practical reactions of aryl aldehydes or ketones with 1,3-di-n-butylimidazolium tribromide ([BBIm]Br-3), as a brominating reagent under solvent-free conditions in very high yields. The process has several advantages: high conversions, short reaction time, mild reaction conditions, simple workup with good to quantitative yields and re-usable ionic liquid.
Novel boron–dibenzopyrromethene dyes with thienyl-cyanoacrylic acid units were synthesized and characterized for application in dye-sensitized solar cells (DSSCs).
An efficient, rapid, and regioselective bromination of anilines and phenols with 1-butyl-3-methylpyridinium tribromide as a new reagent/solvent under mild conditions
作者:Sanjay P. Borikar、Thomas Daniel、Vincent Paul
DOI:10.1016/j.tetlet.2008.12.053
日期:2009.3
1-Butyl-3-methylpyridinium tribromide, [BMPy]Br-3 proves to be a highly efficient, regioselective reagent/solvent for nuclear bromination of various anilines and phenols. The synthesis and characterization of the room temperature ionic liquid [BMPy]Br-3 (2) is described. The bromination was carried out in the absence of organic solvents and in most cases the only extraction solvent needed was water. The spent 1-butyl-3-methylpyridinium bromide (1) was easily recycled. (C) 2008 Elsevier Ltd. All rights reserved.
Facile p-toluenesulfonic acid-promoted para-selective monobromination and chlorination of phenol and analogues
para-Regioselective bromination of phenol and analogues, promoted by p-toluenesulfonic acid, is achieved in high to excellent yields at room temperature with N-bromosuccinimide. Chlorination with N-chlorosuccinimide and catalysed by p-toluenesulfonic acid also gives para-chlorinated phenol analogues in good yields at room temperature. (C) 2010 Elsevier Ltd. All rights reserved.
COMPOUNDS FOR THE TREATMENT OF INFLAMMATORY DISEASES
申请人:Wong Michael K.C.
公开号:US20110288077A1
公开(公告)日:2011-11-24
This invention relates to compounds of the Formula (I)-(IX):, as defined herein, or a pharmaceutically acceptable salt, solvate or ester thereof, which can be useful for the treatment of diseases or conditions mediated by MMPs, ADAMs, TACE, aggrecanase, TNF-α combinations thereof.