A Metal-Free and Ionic Liquid-Catalyzed Aerobic Oxidative Bromination in Water
作者:Jian Wang、Shu-Bin Chen、Shu-Guang Wang、Jing-Hua Li
DOI:10.1071/ch14161
日期:——
aerobic oxidative bromination of aromatic compounds in water has been developed. Hydrobromic acid is used as a bromine source and 2-methylpyridinium nitrate ionic liquid is used as a recyclable catalyst. Water is used as the reaction mediate. This is the first report of aerobic oxidative bromination using only catalytic amount of metal-free catalyst. This system shows not only high bromine atom economy
Simple protic ionic liquid [Et3NH][HSO4] as a proficient catalyst for facile synthesis of biscoumarins
作者:Sandip K. Patil、Deepak V. Awale、Madagonda M. Vadiyar、Suryakant A. Patil、Sagar C. Bhise、Sanjay S. Kolekar
DOI:10.1007/s11164-017-2932-5
日期:2017.10
Abstract We have explored a number of protic ionicliquids (PILs) as a catalyst for the synthesis of biscoumarins by condensation of 4-hydroxycoumarin with an aromatic aldehyde. Methylimidazolium- and triethylammonium-based PILs were synthesized by simple neutralization reaction with protic acids. Triethylammoniumhydrogensulfate [Et3NH][HSO4] was found to be the best among the studied PILs concerning
Unexpected Heterocyclization of Electrophilic Alkenes by Tetranitromethane in the Presence of Triethylamine. Synthesis of 5-Nitroisoxazoles
作者:Yulia A. Volkova、Elena B. Averina、Dmitry A. Vasilenko、Kseniya N. Sedenkova、Yuri K. Grishin、Per Bruheim、Tamara S. Kuznetsova、Nikolai S. Zefirov
DOI:10.1021/acs.joc.8b03086
日期:2019.3.15
A novel reaction of tetranitromethane with electrophilic alkenes in the presence of triethylamine affording substituted 5-nitroisoxazoles is described. Triethylamine reacts with tetranitromethane to generate N-nitrotriethylammonium and trinitromethanide. This process provides the heterocyclization of electrophilic alkenes. A variety of α,β-unsaturated aldehydes, ketones, esters, amides, phosphonates
Thermodynamic studies of aqueous solutions of ammonium based nitrate protic ionic liquids at different temperatures (288.15 K to 303.15 K) and 101.325 kPa: A volumetric approach
作者:Kunal R. Patil、Vasim R. Shaikh、Sarika K. Patil、Dilip H. Dagade、Kesharsingh J. Patil
DOI:10.1016/j.molliq.2019.110884
日期:2019.8
were used to calculate the apparent molar volume (Vϕ), partial molar volume of solvent (V¯1) and solute (V¯2) at all studied temperatures. The limiting apparent molarvolumes (Vϕ0) are reported. The apparent molarexpansivity (Eϕ) of PILs at finite concentrations as well as at infinite dilutions are reported at 293.15 and 298.15 K. It is observed that water structure making effect exhibited by cations