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Journal articles on the topic 'Carboxylic acids'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Uttry, Alexander, and Manuel van Gemmeren. "Direct C(sp3)–H Activation of Carboxylic Acids." Synthesis 52, no. 04 (2019): 479–88. http://dx.doi.org/10.1055/s-0039-1690720.

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Carboxylic acids are important in a variety of research fields and applications. As a result, substantial efforts have been directed towards the C–H functionalization of such compounds. While the use of the carboxylic acid moiety as a native directing group for C(sp2)–H functionalization reactions is well established, as yet there is no general solution for the C(sp3)–H activation of aliphatic carboxylic acids and most endeavors have instead relied on the introduction of stronger directing groups. Recently however, novel ligands, tools, and strategies have emerged, which enable the use of free

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2

Lee, Seon Yong, Uijin Jo, Bongsu Chang, and Young Jae Lee. "Effects of Preferential Incorporation of Carboxylic Acids on the Crystal Growth and Physicochemical Properties of Aragonite." Crystals 10, no. 11 (2020): 960. http://dx.doi.org/10.3390/cryst10110960.

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The preferential incorporation of carboxylic acids into aragonite and its effects on the crystal growth and physicochemical properties of aragonite were systematically investigated using a seeded co-precipitation system with different carboxylic acids (citric, malic, acetic, glutamic, and phthalic). Aragonite synthesized in the presence of citric and malic acids showed a remarkable decrease in the crystallinity and size of crystallite, and the retardation of crystal growth distinctively changed the crystal morphology. The contents of citric acid and malic acid in the aragonite samples were 0.6

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3

Markovic, Zoran, Dalibor Bajduk, and Ivan Gutman. "Geometry and conformation of benzenecarboxylic acids." Journal of the Serbian Chemical Society 69, no. 11 (2004): 877–82. http://dx.doi.org/10.2298/jsc0411877m.

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The geometry, conformations and energy of mono-, di-, and tri-carboxylic derivatives of benzene were studied by means of the AM1 molecular-orbital method. Whereas the species having no carboxylic groups in the ortho-position (benzoic, isophthalic, terephthalic, and trimesic acids) are planar in all their (stable) conformations, those possessing carboxylic groups in the ortho-position (phthalic, 1,2,3-benzenetricarboxylic, and 1,2,4-benzenetricarboxylic acids) assume a non-planar geometry, with one carboxyl group almost orthogonal to the plane of the benzene ring. Various rotamers of each of th

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4

Cavallaro, Palmira Alessia, Marzia De Santo, Marianna Greco, et al. "Titanium Tetrachloride-Assisted Direct Esterification of Carboxylic Acids." Molecules 29, no. 4 (2024): 777. http://dx.doi.org/10.3390/molecules29040777.

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Ester compounds, widely found in pharmaceutical and natural products, play a crucial role in organic synthesis, prompting the development of numerous methods for their synthesis. An important chemical approach in synthesizing esters from carboxylic acids involves the activation of the carboxyl function, requiring the conversion of the hydroxyl group into a suitable leaving group. This paper presents the findings of our investigations into an efficient method for producing esters from carboxylic acids and alcohols, using the Lewis acid titanium tetrachloride. Titanium tetrachloride has proven h

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5

Sultanova, R. M., N. S. Khusnutdinova, Yu G. Borisova, et al. "Selective synthesis of some carboxylic acids esters." Журнал общей химии 93, no. 1 (2023): 3–10. http://dx.doi.org/10.31857/s0044460x23010018.

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The synthesis of esters of some carboxylic acids by the method of oxidative esterification was carried out. It was shown that the proposed method allows the selective esterification of carboxylic acids with hindered carboxyl groups. It was found that the synthesized esters have anti-aggregation activity at the level of acetylsalicylic acid.

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6

Chen, Zhen-Bang, Kui Liu, Fang-Ling Zhang, Qing Yuan, and Yong-Ming Zhu. "Palladium-catalyzed oxidative coupling of arylboronic acid with isocyanide to form aromatic carboxylic acids." Organic & Biomolecular Chemistry 15, no. 38 (2017): 8078–83. http://dx.doi.org/10.1039/c7ob01428g.

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7

Fujiwara, Takuya, Ryoto Inoue, Takuma Ohtawa, and Makoto Tsunoda. "Liquid-Chromatographic Methods for Carboxylic Acids in Biological Samples." Molecules 25, no. 21 (2020): 4883. http://dx.doi.org/10.3390/molecules25214883.

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Carboxyl-bearing low-molecular-weight compounds such as keto acids, fatty acids, and other organic acids are involved in a myriad of metabolic pathways owing to their high polarity and solubility in biological fluids. Various disease areas such as cancer, myeloid leukemia, heart disease, liver disease, and lifestyle diseases (obesity and diabetes) were found to be related to certain metabolic pathways and changes in the concentrations of the compounds involved in those pathways. Therefore, the quantification of such compounds provides useful information pertaining to diagnosis, pathological co

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8

van Gemmeren, Manuel, та Alexander Uttry. "The Direct Pd-Catalyzed β-C(sp3)–H Activation of Carboxylic Acids". Synlett 29, № 15 (2018): 1937–43. http://dx.doi.org/10.1055/s-0037-1610150.

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The carboxylic acid moiety is one of the most versatile and abundant functional groups. However, despite of tremendous progress in the field of C–H functionalization reactions its use as a directing group for C(sp3)–H activation has remained limited. In this Synpact article we present the challenges associated with the carboxylic acid moiety as a native directing group and report on the newest developments in this field, including our recent study in which we developed a generally applicable protocol for the direct palladium catalyzed β-C(sp3)–H arylation of propionic acid and related α-branch

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9

Herges, Rainer, and Wolfgang Reif. "Photoresponsive Carboxylic Acids." Liebigs Annalen 1996, no. 5 (2006): 761–68. http://dx.doi.org/10.1002/jlac.199619960519.

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10

Abualhasan, Murad N., and David G. Watson. "Tagging Fatty Acids Via Choline Coupling for the Detection of Carboxylic Acid Metabolites in Biological Samples." Current Analytical Chemistry 15, no. 6 (2019): 642–47. http://dx.doi.org/10.2174/1573411014666180516093353.

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Background: Fatty acids and other metabolites containing a carboxyl group are of high interest in biomedicine because of their major role in many metabolic pathways and, particularly in the case of oxidised fatty acids, their high biological activity. Tagging carboxylic acid compounds with a permanent positive charge such as a quaternary ammonium compound could increase the LC-MS detection sensitivity and selectivity. This paper describes a new and novel strategy for analysing carboxylcontaining compounds in biological samples by ESI-MS through coupling to choline. Methods: Coupling of carboxy

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11

Horak, Y. І., D. S. Shevchenko, and I. В. Sobechko. "Thermodynamic parameters of 5-(nitrophenyl)-furan-2-carboxylic acids solutions in propan-2-ol." Chemistry, Technology and Application of Substances 6, no. 1 (2023): 15–21. http://dx.doi.org/10.23939/ctas2023.01.015.

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Based on the temperature dependence of the solubility of 5-(2-nitrophenyl)-furan-2-carboxylic acid, 5-(3-nitrophenyl)-furan-2-carboxylic acid and 5-(4-nitrophenyl)-furan-2-carboxylic acid in propan-2-ol, the enthalpy and entropy of their dissolution were calculated. Taking into account the enthalpy and entropy of melting recalculated to 298 K, the enthalpies and entropies of mixing were calculated. The dependence of the solubility of carboxyl-containing substances at 298 K on their melting point was determined.

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12

Iwami, Y., S. Hata, N. Takahashi, and T. Yamada. "Difference in Amounts between Titratable Acid and Total Carboxylic Acids Produced by Oral Streptococci during Sugar Metabolism." Journal of Dental Research 68, no. 1 (1989): 16–19. http://dx.doi.org/10.1177/00220345890680010101.

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The acid produced by the resting cells of Streptococcus mutans NCTC 10449 and HS 6 and S. sanguis ATCC 10556 during sugar metabolism was estimated with a pH-stat and a carboxylic acid analyzer. Lactic, formic, acetic, pyruvic, and carbonic acids were detected in the reaction mixtures, but propionic, citric, succinic, iso-butyric, butyric, iso-valeric, and valeric acids were not detected. The amount of titratable acid estimated by alkaline titration with the pH-stat was larger than the amount of total carboxylic acids estimated with the carboxylic acid analyzer. The difference in quantity betwe

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13

Adamczyk-Woźniak, Agnieszka, and Andrzej Sporzyński. "KWASY BORONOWE I KARBOKSYLOWE - PODOBIEŃSTWA I RÓŻNICE." Wiadomości Chemiczne 76, no. 7 (2022): 633–59. https://doi.org/10.53584/wiadchem.2022.7.7.

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Two groups of compounds were compared - boronic acids RB(OH)2 and carboxylic acids RCOOH. The similarities and differences in their acidic character, structures, esterification reactions, and anhydride formation are shown. The systems containing both the boronic -B(OH)2 and carboxyl -COOH functional groups were also discussed

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14

Hu, Yue, Wei Sun, and Chao Liu. "Deoxygenative Transformation of Carbonyl and Carboxyl Compounds Using gem-Diborylalkanes." Synlett 30, no. 10 (2019): 1105–10. http://dx.doi.org/10.1055/s-0037-1611728.

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gem-Diborylalkanes serve as privileged carbanion precursors for the efficient construction of carbon–carbon bond with various carbonyl and carboxyl compounds. We highlight the recent advances on deoxygenative transformation of carbonyl and carboxyl compounds using gem-diborylalkanes reagents. Our recent development of a dual functionalization of gem-diborylalkanes through deoxygenative enolization with the carboxylic acids is also discussed.1 Introduction2 Activation Modes of gem-Diborylalkanes3 Deoxygenative Transformation of Carbonyl and Carboxyl Compounds via α-Diboryl Carbanion3.1 Reactio

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15

Alona, Savych, Marchyshyn Svitlana, Basaraba Roksolana, and Kryskiw Liubomyr. "Determination of carboxylic acids content in the herbal mixtures by HPLC." ScienceRise: Pharmaceutical Science, no. 2(30) (April 30, 2021): 33–39. https://doi.org/10.15587/2519-4852.2021.229132.

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<strong>The aim</strong> of the study was to research the qualitative composition and to investigate the quantitative content of some carboxylic acids in the herbal mixtures with established hypoglycemic, hypolipidemic and antioxidant activity in previous studies in vivo. <strong>Materials and methods.</strong> Studies of carboxylic acid content in the herbal mixtures were performed by HPLC analysis using Agilent Technologies 1200 liquid chromatograph (USA). Identification and quantitative analysis were performed using standard solutions of carboxylic compounds (tartaric, pyruvic, is

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16

Zhang, Xuexin, Yang Gao, Ronibala Devi Laishram та ін. "Pd(ii)/Zn co-catalyzed chemo-selective hydrogenation of α-methylene-γ-keto carboxylic acids". Organic & Biomolecular Chemistry 17, № 8 (2019): 2174–81. http://dx.doi.org/10.1039/c9ob00005d.

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17

Novotný, O., K. Cejpek, and J. Velíšek. "Formation of carboxylic acids during degradation of monosaccharides." Czech Journal of Food Sciences 26, No. 2 (2008): 113–31. http://dx.doi.org/10.17221/2465-cjfs.

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The formation of low molecular carboxylic and hydroxycarboxylic acids as well as sugar and deoxysugar acids from monosaccharides (D-glucose, D-fructose, D-arabinose, DL-glyceraldehyde, and 1,3-dihydroxyacetone) was studied in three different model systems: aqueous and alkaline solutions of potassium peroxodisulfate (K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>), and sodium hydroxide solution. In total, 3 low molecular carboxylic acids (formic, acetic and propionic), 24 hydroxycarboxylic acids, and 12 corresponding lactones were identified and quantified by GC/MS.

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18

Luo, Sanzhong, Longji Li, Qi Yang, and Zongbin Jia. "Organocatalytic Electrochemical C–H Lactonization of Aromatic Carboxylic Acids." Synthesis 50, no. 15 (2018): 2924–29. http://dx.doi.org/10.1055/s-0036-1591558.

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An electrochemical strategy has been developed for radical arene carbon–oxygen bond formation. This reaction utilizes DDQ as a redox mediator, with inexpensive glassy carbon electrodes to facilitate an intramolecular lactonization of biphenyl-2-carboxylic acid derivatives via aromatic carboxyl radical substitution to give 6H-benzo[c]chromen-6-ones.

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19

Kubicki, Maciej, Teresa Borowiak, and Wiesław Z. Antkowiak. "Hydrogen Bonds in "Carboxyoximes": the Case of Bomane Derivatives." Zeitschrift für Naturforschung B 55, no. 8 (2000): 677–84. http://dx.doi.org/10.1515/znb-2000-0802.

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Abstract The tendency of forming mixed carboxyl-to-oxime hydrogen bonds was tested on the series of bornane derivatives: one with the acid function only (bornane-2-endo-carboxylic acid), one with the oxime function (2,2′-diethylthiobomane-3-oxime), and one with both oxime and carboxylic functions (bornane-2-oxime-3-endo-carboxylic acid). The crystal structures of these compounds were determined by means of X-ray diffraction. In bornane-2-endo-carboxylic acid and 2,2′-diethylthiobornane-3-oxime 'homogenic' hydrogen bonds were found, and these hydrogen bonds close eight-and six-membered rings, r

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20

Vogt, Kyra Atessa, and Iris Steinberg. "Impact of Dispersing on the Production and Extraction of Bio-Based Basic Chemicals from Biogenic Secondary Waste." Environmental and Climate Technologies 28, no. 1 (2024): 490–99. http://dx.doi.org/10.2478/rtuect-2024-0038.

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Abstract Biogenic waste from waste treatment plants, secondary waste, can be used to produce bio-based carboxylic acids, conventionally produced by chemical synthesis from petroleum-based feedstocks or by synthesis from natural oils. The cascading use of organic residues and wastes to produce bio-based products can contribute to the circular bioeconomy. In the process of biologically treating waste to produce bio-based carboxylic acids, microorganisms already present in the secondary waste use ethanol to convert short-chain into medium-chain carboxylic acids. The medium-chain carboxylic acids

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21

Abidov, U. A., S. G. Usmanova, Kh M. Zhamolova, and U. O. Mamatkulova. "SYNTHETIC ACETYLENE CARBOXYLIC ACIDS." RUSSIAN ELECTRONIC SCIENTIFIC JOURNAL 36, no. 2 (2020): 10–17. http://dx.doi.org/10.31563/2308-9644-2020-36-2-10-17.

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The article presents some methods for the synthesis of acetylene mono, dicarbonoaliphatic, aromatic, heterocyclic acids. Among them, some possess antifungal and biological properties. By the interaction of acids or acid chlorides with the corresponding alcohols, esters can be obtained. Their biological properties, as well as some chemical transformations, were studied. Many synthetic acetylenic acids and their derivatives were synthesized mainly by the Grignard reaction and other methods in order to study their physiological activity. Some of them have gained application as a stabilizer of cor

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22

Kaimoto, Yuko, Shigeyasu Mori, Nobuyuki Matsuzawa, Koichi Kuhara, and Masaru Sasago. "Silylation for Carboxylic Acids." Journal of Photopolymer Science and Technology 11, no. 4 (1998): 633–39. http://dx.doi.org/10.2494/photopolymer.11.633.

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23

Zgoda, Joanna R., Alan J. Freyer, Lew B. Killmer, and John R. Porter. "Polyacetylene Carboxylic Acids fromMitrephoracelebica." Journal of Natural Products 64, no. 10 (2001): 1348–49. http://dx.doi.org/10.1021/np0102509.

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24

Harrison, T., and T. Laduwahetty. "Carboxylic acids and esters." Contemporary Organic Synthesis 2, no. 2 (1995): 107. http://dx.doi.org/10.1039/co9950200107.

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25

Ladduwahetty, Tammy. "Carboxylic acids and esters." Contemporary Organic Synthesis 3, no. 3 (1996): 243. http://dx.doi.org/10.1039/co9960300243.

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26

Ladduwahetty, Tammy. "Carboxylic acids and esters." Contemporary Organic Synthesis 4, no. 4 (1997): 309. http://dx.doi.org/10.1039/co9970400309.

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27

Franklin, Alison S. "Carboxylic acids and esters." Journal of the Chemical Society, Perkin Transactions 1, no. 24 (1999): 3537–54. http://dx.doi.org/10.1039/a808136k.

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28

Franklin, Alison S. "Carboxylic acids and esters." Journal of the Chemical Society, Perkin Transactions 1, no. 15 (1998): 2451–66. http://dx.doi.org/10.1039/a705687g.

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29

Polyakov, V. V., V. K. Orlov, R. Zh Shukenova, and N. I. Mullaeva. "Carboxylic acids ofPopulus balsamifera." Chemistry of Natural Compounds 21, no. 6 (1985): 795. http://dx.doi.org/10.1007/bf00576226.

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30

Rebrovic, L. "Manufacture of carboxylic acids." Zeolites 17, no. 5-6 (1996): 525. http://dx.doi.org/10.1016/0144-2449(96)89007-5.

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31

Torii, Sigeru, and Hideo Tanaka. "ChemInform Abstract: Carboxylic Acids." ChemInform 32, no. 33 (2010): no. http://dx.doi.org/10.1002/chin.200133288.

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32

OGLIARUSO, M. A., and J. F. WOLFE. "ChemInform Abstract: Carboxylic Acids." ChemInform 27, no. 31 (2010): no. http://dx.doi.org/10.1002/chin.199631288.

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33

Ishiguro, Toshihiro, Takako Fuse, Masahide Oka, et al. "Synthesis of branched cyclomaltooligosaccharide carboxylic acids (cyclodextrin carboxylic acids) by microbial oxidation." Carbohydrate Research 331, no. 4 (2001): 423–30. http://dx.doi.org/10.1016/s0008-6215(01)00053-2.

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34

Liu, Wen Ming, Fen Liu, Zhao Ping Chen, and Feng Yi Li. "Epoxidation of Propylene with O₂ Catalyzed by EuCl₃." Advanced Materials Research 550-553 (July 2012): 375–78. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.375.

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The formation of propylene oxide from propylene by direct oxidation with O2 has been studied with catalysts of rare earth chloride under different carboxylic acids and solvents, and the mechanism of this reaction has been discussed preliminarily. Significant PO-formation was only observed when catalyzed by EuCl3 and in the presence of zinc powder and carboxylic acids. In using carboxylic acids, propanoic acid is the best for the epoxidation of propylene. The yields of the epoxide became higher than those without solvents, but basic substance was not suitable as solvent. In the catalytic system

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35

Linh, Cao Nhat, Alexander N. Zyablov, Olga V. Duvanova, and Vladimir F. Selemenev. "SORPTION OF CARBOXYLIC ACIDS BY MOLECULARLY IMPRINTED POLYMERS." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 63, no. 2 (2020): 71–76. http://dx.doi.org/10.6060/ivkkt.20206302.6071.

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Molecularly imprinted polymers were synthesized as selective coatings of piezoelectric sensors for determination of carboxylic acids in the intermediate fractions of rectified ethanol. Molecularly imprinted polymers were obtained by reorganizing and imidizing polyamic acid chains in N,N-dimethylformamide in the presence of a template by the non-covalent imprinting method. The ability of molecularly imprinted polymers to recognize the target templates was evaluated by studying their sorption properties in comparison with non-imprinted polymers using direct conductometry in static mode. The equi

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36

Zhylko, V. U., and N. V. Nekhan. "Cationic dyes and their use for the quantitative extraction-photometric determination of higher carboxylic acids." Proceedings of the National Academy of Sciences of Belarus, Chemical Series 57, no. 1 (2021): 33–40. http://dx.doi.org/10.29235/1561-8331-2021-57-1-33-40.

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Cationic dyes of various natures have been investigated in order to select a dye that is stable under strongly alkaline conditions and applicable for the quantitative extraction-photometric determination of higher carboxylic acids. The nature of the dye, solvent, the length of the hydrocarbon radical of carboxylic acids and the pH of the aqueous phase for the extraction of ionic associates of higher carboxylic acids with cationic dye with pyronin G were experimentally studied. The study substantiates the practical application of the cationic dye pyronin G as an effective reagent for the quanti

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37

Feng, Z., R. Alén, and K. Niemelä. "Formation of Aliphatic Carboxylic Acids during Soda-AQ Pulping of Kenaf Bark." Holzforschung 56, no. 4 (2002): 388–94. http://dx.doi.org/10.1515/hf.2002.061.

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Summary The formation of aliphatic carboxylic acids during soda-AQ pulping of kenaf bark was studied. In addition to formic and acetic acids, a variety of hydroxy monocarboxylic and dicarboxylic acids were monitored. The results showed that the formation of hydroxy acids and formic acid significantly depend, in contrast to acetic acid, on the cooking conditions employed. Detailed gas chromatographic studies revealed that the most abundant hydroxy carboxylic acids were glucoisosaccharinic, lactic, glycolic, 3-deoxypentonic, 2-hydroxybutanoic, xyloisosaccharinic, 3,4-dideoxypentonic, 2-hydroxygl

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38

Eisele, Roland, Keiichi Aritomo, and Wolfgang Pfleiderer. "Pteridines CI Synthesis and Properties of Lumazine-6- and -7-carboxylic Acids." Pteridines 4, no. 4 (1993): 178–86. http://dx.doi.org/10.1515/pteridines.1993.4.4.178.

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Summary Lumazine-6-(8) and 7-carboxylic acid (23) and their N-methyl derivatives (12, 13, 21, 26, 28, 29) have been synthesized and characterized by the determination of their pK values and the UV spectra of the neutral, mono and dianion species. It was noticed that the acidities of the two N-H protons of the pyrimidine moiety are almost the same indicating that the dianions of 8 and 23, respectively, are I: 1 mixtures of the corresponding N-l and N-3 deprotonated forms. The lumazine-7-carboxylic acids (23, 26, 28, 29, 31, 33) are in comparison to their 6-carboxyJic acid counterparts (8, 12, 1

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39

Vogt, Kyra Atessa, Leonie Wenzel, and Iris Steinberg. "Analysis of secondary waste from a plastics recycling plant for the production of carboxylic acids." Detritus, no. 23 (June 30, 2023): 58–64. http://dx.doi.org/10.31025/2611-4135/2023.18277.

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The production of bio-based platform chemicals through the chain elongation of short-chain carboxylic acids to medium-chain carboxylic acids by ethanol-acetat fermentation can be a contribution to the circular economy. To avoid further waste, secondary waste that already contains short-chain carboxylic acids can be used. The potential for the production of bio-based carboxylic acids from a secondary waste of a recycling plant for plastic waste is examined in this paper. Therefore, practical experiments with the process water of a recycling plant for plastic waste were conducted in order to ass

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40

Zhylko, V. U., and N. V. Nekhan. "Application of cationic dye pyronin G (Y) for quantitative photometric and fluorimetric determination of higher carboxylic acids in dairy products using extraction." Proceedings of the National Academy of Sciences of Belarus, Chemical Series 60, no. 1 (2024): 18–26. http://dx.doi.org/10.29235/1561-8331-2023-60-1-18-26.

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In this work we propose to use a heptane-ethanol extract of the ionic associate of higher carboxylic acids with a cationic dye – pyronin G (Y) for quantitative extraction-photometric and extraction-fluorimetric determination of carboxylic acids in dairy products. The resulting ion associate is characterized by a maximum of optical density at 510 nm and intense of fluorescence with a maximum at 566 nm. The maximum optical density and fluorescence intensity of the ion associate is observed during its extraction with octanol/heptane from aqueous solutions with pH = 11.25. The quantum yield of ion

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41

Liu, F., F. Duan, K. He, Y. Ma, K. A. Rahn, and Q. Zhang. "An enhanced procedure for measuring organic acids and methyl esters in PM<sub>2.5</sub>." Atmospheric Measurement Techniques Discussions 8, no. 3 (2015): 2379–407. http://dx.doi.org/10.5194/amtd-8-2379-2015.

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Abstract. We have developed an enhanced analytical procedure to measure organic acids and methyl esters in fine aerosol with much greater specificity and sensitivity than previously available. This capability is important because of these species and their low concentrations, even in highly polluted atmospheres like Beijing, China. The procedure first separates the acids and esters from the other organic compounds with anion-exchange solid- phase extraction (SPE), then, quantifies them by gas chromatography coupled with mass spectrometry. This allows us to accurately quantify the C4-C11 dicarb

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42

Chen, Zhiwei, Jie Sun, Zhiwei Ke, Xiaoxiao Huang, and Ziwei Li. "Silver-catalyzed stereoselective C-4 arylthiodifluoromethylation of coumarin-3-carboxylic acids via a double decarboxylative strategy." Organic Chemistry Frontiers 9, no. 3 (2022): 757–63. http://dx.doi.org/10.1039/d1qo01609a.

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43

Fleischfresser, B. E., and G. C. Smith. "Sorption of Carboxylic Acids by Wool: Effect of Solvents." Textile Research Journal 58, no. 4 (1988): 221–26. http://dx.doi.org/10.1177/004051758805800406.

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The sorption of low molecular weight carboxylic acids by wool from various solvents has been investigated. More extensive sorption was observed from neutral than from either basic or acidic solvents. These results may be rationalized in terms of acid-base interactions between solvent, wool, and carboxylic acids. Basic solvents inhibit sorption by competing with the wool for the acids, whereas acidic solvents inhibit sorption by competing with the carboxylic acids for the wool. Water, an amphoteric solvent, gives limited sorption of acids compared with that found from neutral solvents.

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44

Kagechika, Hiroyuki, Emiko Kawachi, Yuichi Hashimoto, and Koichi Shudo. "Retinobenzoic acids. 2. Structure-activity relationships of chalcone-4-carboxylic acids and flavone-4'-carboxylic acids." Journal of Medicinal Chemistry 32, no. 4 (1989): 834–40. http://dx.doi.org/10.1021/jm00124a016.

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Moczulski, Marek, Ewelina Kowalska, Elżbieta Kuśmierek, Łukasz Albrecht, and Anna Albrecht. "Visible-light synthesis of 4-substituted-chroman-2-ones and 2-substituted-chroman-4-ones via doubly decarboxylative Giese reaction." RSC Advances 11, no. 45 (2021): 27782–86. http://dx.doi.org/10.1039/d1ra05914a.

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Zhou, Shouming, Shira Joudan, Matthew W. Forbes, Zilin Zhou, and Jonathan P. D. Abbatt. "Reaction of Condensed-Phase Criegee Intermediates with Carboxylic Acids and Perfluoroalkyl Carboxylic Acids." Environmental Science & Technology Letters 6, no. 4 (2019): 243–50. http://dx.doi.org/10.1021/acs.estlett.9b00165.

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Shimizu, Hideki, Zhi Zhuang, and Mamoru Aizawa. "Morphological Control of Hydroxyapatite Particles by Homogeneous Precipitation Method in the Co-Presence of Various Carboxylic Acids." Key Engineering Materials 529-530 (November 2012): 61–65. http://dx.doi.org/10.4028/www.scientific.net/kem.529-530.61.

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We focused on the investigation of the influence of carboxylic acid additives on the morphology of hydroxyapatite (Ca10(PO4)6(OH)2, HAp) particles synthesized by a homogeneous precipitation method. Three types of carboxylic acids with different number of carboxyl groups, that is, acetic acid, succinic acid and citric acid, were used as additives to control the nucleation, growth and alignment of HAp crystals. The powder properties of resulting particles were examined by powder X-ray diffractometry, fourier-transform infrared spectroscopy, and scanning electron microscopy. All resulting particl

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df GHADIR, Khalaf, and Sameerah Saadoon MUSTAFA. "TRANSMISSION OF POLAR SUBSTITUENT EFFECTS IN 4`-SUBSTITUTED DIPHENYLACETYLENE-4-CARBOXYLIC ACIDS." MINAR International Journal of Applied Sciences and Technology 05, no. 03 (2023): 133–44. http://dx.doi.org/10.47832/2717-8234.16.9.

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A series of 4'-substituteddiphenylacetylene-4-carboxylic acids' alkaline hydrolysis rate coefficients were measured in 70%(v/v) dimethyl sulfoxide- water at 30.0 C. Using a solution of 80% (w/w) 2-methoxyethanol - water at 25.0 C, the pKa values of 4'- substituted diphenylacetylene-4-carboxylic acids have been determined. Esterification rate constants of corresponding acids with diazodiphenylmethane have been measured at 300C. For the transmission of dipolar ireversible dipolar substituent effects were seen for 4' - substituted diphenylacetylene-4-carboxylic acids. it was normal substituent ef

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Lynch, Daniel E., Tariq Latif, Graham Smith, Karl A. Byriel, Colin H. L. Kennard, and Simon Parsons. "Molecular Cocrystals of Carboxylic Acids. XXXI Adducts of 2-Aminopyrimidine and 3-Amino-1,2,4-triazole with Heterocyclic Carboxylic Acids." Australian Journal of Chemistry 51, no. 5 (1998): 403. http://dx.doi.org/10.1071/c97201.

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A series of molecular adducts of 2-aminopyrimidine and 3-amino-1,2,4-triazole with heterocyclic carboxylic acids have been prepared and characterized by using X-ray powder diffraction and in four cases by single-crystal X-ray diffraction methods. These four compounds are the (1 : 1) adducts of 2-aminopyrimidine with indole-3-acetic acid [(C4H5N3)(C10H9NO2)], N-methylpyrrole-2-carboxylic acid [(C4H5N3)(C6H7NO2)] and thiophen-2-carboxylic acid [(C4H5N3)(C5H4O2S)], and the (1 : 1) adduct of 3-amino-1,2,4-triazole with thiophen-2-carboxylic acid [(C2H4N4)(C5H4O2S)]. Other compounds described are t

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Kunwar, Bhagawati, Kazuhiro Torii, Shankar G. Aggarwal, Akinori Takami, and Kimitaka Kawamura. "Comparisons of GC-Measured Carboxylic Acids and AMS m/z 44 Signals: Contributions of Organic Acids to m/z 44 Signals in Remote Aerosols from Okinawa Island." Applied Sciences 12, no. 16 (2022): 8017. http://dx.doi.org/10.3390/app12168017.

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An intercomparison study was conducted to evaluate the contributions of carboxylic acids to m/z 44 (COO+) signals obtained by an on-line aerosol mass spectrometer (AMS) during a field campaign at Cape Hedo, Okinawa, in the western North Pacific Rim. We report for the first time that carboxylic acids (diacids, oxoacids, benzoic acid, and fatty acids) significantly contribute to m/z 44 signals with a strong correlation (R = 0.93); oxalic acid accounts for 16 ± 3% of the m/z 44 signals and 3.7 ± 0.9% of organic mass measured by AMS. We also found that about half of AMS m/z 44 signals can be expla

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