A Simple and Practical Method for the Preparation and Purity Determination of Halide-Free Imidazolium Ionic Liquids
作者:Claúdia C. Cassol、Günter Ebeling、Bauer Ferrera、Jairton Dupont
DOI:10.1002/adsc.200505295
日期:2006.1
PF3(CF2CF3)3, CF3SO3 and N(CF3SO2)2] by simple reaction of anions, salts, or acids in water at room temperature. Extraction with dichloromethane, filtration through a short basic alumina column and solvent evaporation affords the desired ionic liquids in 80–95% yield. The purity (>99.4%) of these ionic liquids can be determined by 1HNMR spectra using the intensity of the 13C satellites of the imidazolium
N-烷基咪唑与烷基磺酸盐在室温下的反应以高收率得到作为结晶固体的1,3-二烷基咪唑鎓链烷磺酸盐。链烷磺酸根阴离子很容易被一系列其他阴离子[BF 4,PF 6,PF 3(CF 2 CF 3)3,CF 3 SO 3和N(CF 3 SO 2)2取代通过室温下水中的阴离子,盐或酸的简单反应。用二氯甲烷萃取,通过短的碱性氧化铝柱过滤,并蒸发溶剂,以80-95%的产率提供所需的离子液体。这些离子液体的纯度(> 99.4%)可以通过1 H NMR光谱使用咪唑N-甲基的13 C卫星的强度作为内标来确定。
Physicochemical Characterization of New Sulfonate and Sulfate Ammonium Ionic Liquids
In this work we describe the synthesis and thermal properties of nine new salts derived from ammonium that incorporate alkanesulfonate and alkanesulfate anions. Their structures were confirmed by 1H and 13C NMR and HRMS-ESI. Their thermal properties were determined by differential scanning calorimetry (DSC). Three of the synthesized salts have been shown to be room temperature ionic liquids: N-eth
在这项工作中,我们描述了九种衍生自铵盐的新盐的合成和热学性质,这些盐结合了链烷磺酸根和链烷磺酸根阴离子。它们的结构通过1 H和13 C NMR和HRMS-ESI确认。它们的热性质通过差示扫描量热法(DSC)确定。已显示三种合成的盐为室温离子液体:N-乙基-N-(2-羟乙基)-N,N-二甲基丁烷磺酸铵,N-乙基N,N-二甲基丁基铵乙基硫酸盐和N-乙基N-(2-羟乙基)-N,N-二甲基乙基硫酸铵。在T = 298.15 K时测量了这三种离子液体的实验密度,声速,动态粘度和折射率。
N-Alkylation of N-trimethylsilyl derivatives of lactams, amides, and imides with alkyl sulfonates
作者:A. D. Shagina、E. P. Kramarova、A. G. Shipov、D. V. Tarasenko、Vad. V. Negrebetsky、Yu. I. Baukov
DOI:10.1007/s11172-020-2775-x
日期:2020.2
The reaction of N -trimethylsilyl derivatives of amides and imides with alkyl sulfonates on heating affords the corresponding N -alkyl derivatives and trimethylsilyl sulfonates.
The present invention provides a method for producing a sulfonate ester efficiently and in high yield.
The present invention is an invention of a method for producing a sulfonate ester compound, which comprising reacting:
(a) a compound having a sulfo group (—SO3H); and
(b) a compound having a group represented by the general formula [1]:
—OR1 [1]
[wherein, R1 represents a sulfonyl group represented by the general formula [2]:
—SO2—R2 [2]
(wherein, R2 represents a halogen atom, a haloalkyl group, an alkoxy group, or an optionally substituted alkyl group or an optionally substituted aryl group) or an acyl group represented by the general formula [3]:
(wherein, R3 represents an optionally substituted alkyl group or an optionally substituted aryl group)];
in the presence of an organic base which is capable of forming a salt with said sulfo group.