scispace - formally typeset
Search or ask a question
Topic

Carboxylic acid

About: Carboxylic acid is a research topic. Over the lifetime, 48544 publications have been published within this topic receiving 605696 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: The synthesis of four novel compounds, including hydrazones (2), (3) and (7) exist in two conformers as synperiplanar and antiperiPlanar, and Structural assignment, stereochemistry and biological assays are discussed.

117 citations

Journal ArticleDOI
TL;DR: In this article, two new methods for preparing carboxylic acid aryl esters are presented, which consist in reacting the carboxyl acid with (a) sulfites or (b) aryls phosphites in the presence of pyridine and a possible mechanism of the sulfite method is discussed.
Abstract: Two new methods for preparing carboxylic acid aryl esters are presented. They consist in reacting the carboxylic acid with (a) aryl sulfites or (b) aryl phosphites in the presence of pyridine. A possible mechanism of the sulfite method is discussed.

116 citations

Journal ArticleDOI
TL;DR: In this paper, the formation of hydrogen peroxide and organic hydroperoxides was investigated in the gas phase ozonolysis of ethene, trans-2-butene, and 2,3-dimethyl-2butene.
Abstract: Ozone-alkene reactions generate stabilized Criegee intermediates (of the form R1R2COO), which are believed to react with water molecules to form organic hydroperoxides, hydrogen peroxide and carboxylic acids. These reactions are thought to be significant sources of these environmentally important compounds, yet both the yields of stabilized Criegee intermediates and the branching ratios from their reaction with water are not well known. The formation of hydrogen peroxide and organic hydroperoxides was investigated in the gas phase ozonolysis of ethene, trans-2-butene, and 2,3-dimethyl-2-butene for relative humidities (RH) from 0 and 80% by gas chromatography with flame ionization detection and high-performance liquid chromatography with fluorescence detection. Additionally, yields of acetaldehyde and acetic acid from trans-2-butene and acetone from 2,3-dimethyl-2-butene were measured. The reactions of stabilized Criegee intermediates with water were found to proceed almost entirely via organic hydroperoxide or hydrogen peroxide formation with little acid formation. Stabilized Criegee intermediate yields of 0.39, 0.24, and 0.10 were obtained for ethene, trans-2-butene, and 2,3-dimethyl-2-butene, respectively.

116 citations

Journal ArticleDOI
TL;DR: A dicationic iridium complex bearing a bidentate ligand that comprises N-heterocyclic carbene and α-hydroxypyridine moieties has been designed and synthesized as discussed by the authors.
Abstract: A dicationic iridium complex bearing a bidentate ligand that comprises N-heterocyclic carbene and α-hydroxypyridine moieties has been designed and synthesized. The complex exhibited high catalytic performance in aqueous media for the dehydrogenative oxidation of secondary alcohols to ketones accompanying the evolution of hydrogen. Furthermore, dehydrogenative transformation of primary alcohols to the carboxylic acids in aqueous media was also catalyzed by the complex without using base.

116 citations

Journal ArticleDOI
TL;DR: In this paper, a polyesterification reaction between cyclodextrins (CDx) and poly(carboxylic acid)s (PCAs) was performed in the dry state at a temperature greater than 140°C in air or in vacuo.
Abstract: Native cyclodextrins (CDx) and some of their derivatives were reacted with poly(carboxylic acid)s (PCAs) (citric acid (CTR), 1,2,3,4-butanetetracarboxylic acid (BTCA), and poly(acrylic acid) (PAA)). These reactions were carried out in the dry state at a temperature greater than 140°C in air or in vacuo. They resulted in water-soluble and insoluble polymers formed by polyesterification between CDx and PCA. In this study, the parameters of the reaction were studied, and their influence on the water solubility or swellability of the obtained polymers was investigated. High reaction temperatures, high PCA/CDx molar ratios, and long reaction times preferably yielded insoluble gels, whereas softer conditions resulted in very soluble polymers. The gels could swell up to 10 times their initial volume in water, and the water-soluble fraction had a solubility of 1 g/mL. A reaction mechanism was proposed that required the use of PCA carrying at least three neighboring carboxylic groups (CTR, BTCA, and PAA), and it was confirmed ex- perimentally by the unsuccessful use of some dicarboxylic acids. A preliminary characterization by Fourier transform infrared spectroscopy and size exclusion chromatography was also conducted. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 433- 442, 2005

116 citations


Network Information
Related Topics (5)
Alkyl
223.5K papers, 2M citations
96% related
Reagent
60K papers, 1.2M citations
93% related
Aryl
95.6K papers, 1.3M citations
93% related
Catalysis
400.9K papers, 8.7M citations
91% related
Palladium
64.7K papers, 1.3M citations
91% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023198
2022457
2021459
2020738
2019842
2018813