Efficient esterification of carboxylic acids and phosphonic acids with trialkyl orthoacetate in ionic liquid
作者:Tomonori Yoshino、Satomi Imori、Hideo Togo
DOI:10.1016/j.tet.2005.09.147
日期:2006.2
environmentally friendly esterification of various carboxylicacids, phosphonicacids, and phosphinicacids with triethyl orthoacetate or trimethyl orthoacetate under neutral conditions in a typical room temperature ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate, was successfully carried out to provide the corresponding ethyl esters or methyl esters in high yields.
Acridine-based fluorophores with improved lightfastness properties
作者:Zubair Khalid Baig Moghal、Ramalingam Manivannan、Young-A Son
DOI:10.1016/j.dyepig.2021.109924
日期:2022.1
properties in solution form when compared to commercially available acridine orange. pH-dependent studies were also carried out to observe the behavior of cationic dyes in a wide range of pH to optimize pH for dyeing. The presence of extended conjugation at the 9th position and additional four methoxy groups resulted in highly fluorescent dyes with excellent quantum yield. The steric interactions, higher
Construction of Esters through Sulfuryl Fluoride (SO2F2) Mediated Dehydrative Coupling of Carboxylic Acids with Alcohols at Room Temperature
作者:Shi-Meng Wang、Njud S. Alharbi、Hua-Li Qin
DOI:10.1055/s-0039-1690017
日期:2019.10
on gram scale. A facile method for the construction of esters through dehydrative coupling of carboxylic acids with alcohols is developed. The reactions are mediated by sulfuryl fluoride (SO2F2) at room temperature and proceed with high efficiency. The method has several advantages including broad substrate scope, mild conditions, excellent functional group compatibility and affords high yields, even
抽象的 开发了一种通过羧酸与醇类的脱水偶合来构建酯的简便方法。该反应在室温下由硫酰氟(SO 2 F 2)介导,并以高效率进行。该方法具有许多优点,包括广泛的底物范围,温和的条件,出色的官能团相容性,即使在克级上也能提供高收率。 开发了一种通过羧酸与醇类的脱水偶合来构建酯的简便方法。该反应在室温下由硫酰氟(SO 2 F 2)介导,并以高效率进行。该方法具有许多优点,包括广泛的底物范围,温和的条件,出色的官能团相容性,即使在克级上也能提供高收率。
Environmentally Friendly Esterification of Carboxylic Acids with Triethyl Orthoacetate in Ionic Liquid
作者:Hideo Togo、Tomonori Yoshino
DOI:10.1055/s-2004-829058
日期:——
An operationally simple, inexpensive, efficient, and environmentally friendly esterification of carboxylic acids with triethyl orthoacetate under neutral conditions in a typical room temperature ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate, was carried out to provide the corresponding ethyl esters in high yields.
Synthesis and Optical Properties of Trioxatriangulenium Dyes with One and Two Peripheral Amino Substituents
作者:Thomas J. Sørensen、Bo W. Laursen
DOI:10.1021/jo1009917
日期:2010.9.17
dye systems, with one or two dialkylamino donor groups attached to resonant positions at the periphery of a trioxatriangulenium ion, were synthesized. The mono- and bis-dialkylamino trioxatriangulenium salts (A1-TOTA+ and A2-TOTA+) were prepared from methoxy-substituted triphenylmethylium (TPM) compounds by aromatic nucleophilic substitution with secondary amines and subsequent intramolecular ring