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Relevant bibliographies by topics / Aldehydes and ketones

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Academic literature on the topic 'Aldehydes and ketones'

Author: Grafiati

Published: 5 June 2025

Last updated: 24 June 2025

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Journal articles on the topic "Aldehydes and ketones"

1

Kabalka, George W., Su Yu, and Nan-Sheng Li. "Selective hydroboration of alkenes and alkynes in the presence of aldehydes and ketones." Canadian Journal of Chemistry 76, no. 6 (1998): 800–805. http://dx.doi.org/10.1139/v98-042.

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The reactions of terminal alkenes in the presence of ketones or aldehydes with a variety of borane reagents have been investigated. It was found that the selective hydroboration of a terminal alkene in the presence of a ketone or an aldehyde is most efficient when dicyclohexylborane is used as the hydroborating agent. The hydroboration of olefinic ketones and olefinic aldehydes with dicyclohexylborane generates the corresponding hydroxyaldehydes and hydroxyketones in good yields after oxidation with sodium perborate. The hydroboration of alkynyl ketones and alkynyl aldehydes with dicyclohexylborane yields the corresponding olefinic carbonyl compounds after protonation, or dicarbonyl compounds after oxidation.Key words: hydroboration, reduction, dicyclohexylborane, hydroxyaldehyde, hydroxyketone.

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2

Mai, Juri, and Sascha Ott. "The Fascinating World of Phosphanylphosphonates: From Acetylenic Phosphaalkenes to Reductive Aldehyde Couplings." Synlett 30, no. 16 (2019): 1867–85. http://dx.doi.org/10.1055/s-0039-1690129.

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This account highlights the versatility of phosphanylphosphonates, which can be used for the preparation of phosphorus-containing π-systems and as reagents for the reductive coupling of carbonyl compounds to alkenes. Phosphanylphosphonates with metal fragments coordinated to the P-lone pair have been known for a long time and they have been used for the synthesis of phosphaalkenes by means of the phospha-Horner–Wadsworth–Emmons reaction. With the original aim of incorporating phosphorus heteroatoms into classical all-carbon ethynylethene scaffolds, we entered the field of phosphanylphosphonates with the discovery that these compounds engage in complex cascade reactions with acetylenic ketones, forming 1,2-oxaphospholes, cumulenes, and bisphospholes. Later, we synthesized the first metal-free phosphanylphosphonate, which reacts with aldehydes to yield phosphaalkenes, but gives phospholones when diacetylenic ketones are used as substrates. In the final part of the account, we outline our discovery and the development of an unprecedented carbonyl–carbonyl cross-coupling reaction. This protocol offers a straightforward method for the synthesis of nonsymmetric 1,2-disubstituted alkenes directly from two dissimilar aldehydes.1 Combining Acetylenes with Phosphaalkenes2 Synthetic Examples of Acetylenic Phosphaalkenes3 The Phospha-Horner–Wadsworth–Emmons Approach to Phosphaalkenes3.1 Metal-Coordinated Phosphanylphosphonates3.2 Mechanism of the Phospha-Horner–Wadsworth–Emmons Reaction3.3 The First Metal-Free Phosphanylphosphonate and Its Reactivity with Aldehydes4 Reactions with Acetylenic Ketones4.1 Metal-Coordinated Phosphanylphosphonate and Monoacetylenic Ketones4.2 Metal-Coordinated Phosphanylphosphonate and Diacetylenic Ketones4.3 Metal-Free Phosphanylphosphonate and Diacetylenic Ketones5 Metal-Free Phosphanylphosphonate as a Coupling Reagent for Aldehydes6 E-Alkenes by the Reductive Coupling of Two Aldehydes7 Conclusions and Outlook

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Bonilla-Landa, Israel, Emizael López-Hernández, Felipe Barrera-Méndez, Nadia C. Salas, and José L. Olivares-Romero. "Hafnium(IV) Chloride Catalyzes Highly Efficient Acetalization of Carbonyl Compounds." Current Organic Synthesis 16, no. 6 (2019): 913–20. http://dx.doi.org/10.2174/1570179416666190715100505.

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Background: Hafnium(IV) tetrachloride efficiently catalyzes the protection of a variety of aldehydes and ketones, including benzophenone, acetophenone, and cyclohexanone, to the corresponding dimethyl acetals and 1,3-dioxolanes, under microwave heating. Substrates possessing acid-labile protecting groups (TBDPS and Boc) chemoselectively generated the corresponding acetal/ketal in excellent yields. Aim and Objective: In this study. the selective protection of aldehydes and ketones using a Hafnium(IV) chloride, which is a novel catalyst, under microwave heating was observed. Hence, it is imperative to find suitable conditions to promote the protection reaction in high yields and short reaction times. This study was undertaken not only to find a novel catalyst but also to perform the reaction with substrates bearing acid-labile protecting groups, and study the more challenging ketones as benzophenone. Materials and Methods: Using a microwave synthesis reactor Monowave 400 of Anton Paar, the protection reaction was performed on a raging temperature of 100°C ±1, a pressure of 2.9 bar, and an electric power of 50 W. More than 40 substrates have been screened and protected, not only the aldehydes were protected in high yields but also the more challenging ketones such as benzophenone were protected. All the products were purified by simple flash column chromatography, using silica gel and hexanes/ethyl acetate (90:10) as eluents. Finally, the protected substrates were characterized by NMR 1H, 13C and APCI-HRMS-QTOF. Results: Preliminary screening allowed us to find that 5 mol % of the catalyst is enough to furnish the protected aldehyde or ketone in up to 99% yield. Also it was found that substrates with a variety of substitutions on the aromatic ring (aldehyde or ketone), that include electron-withdrawing and electrondonating group, can be protected using this methodology in high yields. The more challenging cyclic ketones were also protected in up to 86% yield. It was found that trimethyl orthoformate is a very good additive to obtain the protected acetophenone. Finally, the protection of aldehydes with sensitive functional groups was performed. Indeed, it was found that substrates bearing acid labile groups such as Boc and TBDPS, chemoselectively generated the corresponding acetal/ketal compound while keeping the protective groups intact in up to 73% yield. Conclusion: Hafnium(IV) chloride as a catalyst provides a simple, highly efficient, and general chemoselective methodology for the protection of a variety of structurally diverse aldehydes and ketones. The major advantages offered by this method are: high yields, low catalyst loading, air-stability, and non-toxicity.

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Lamm, Vladimir, Xiangcheng Pan, Tsuyoshi Taniguchi, and Dennis P. Curran. "Reductions of aldehydes and ketones with a readily available N-heterocyclic carbene borane and acetic acid." Beilstein Journal of Organic Chemistry 9 (April 8, 2013): 675–80. http://dx.doi.org/10.3762/bjoc.9.76.

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Acetic acid promotes the reduction of aldehydes and ketones by the readily available N-heterocyclic carbene borane, 1,3-dimethylimidazol-2-ylidene borane. Aldehydes are reduced over 1–24 h at room temperature with 1 equiv of acetic acid and 0.5 equiv of the NHC-borane. Ketone reductions are slower but can be accelerated by using 5 equiv of acetic acid. Aldehydes can be selectively reduced in the presence of ketones. On a small scale, products are isolated by evaporation of the reaction mixture and direct chromatography.

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Kippo, Takashi, Yuki Kimura, Mitsuhiro Ueda, Takahide Fukuyama та Ilhyong Ryu. "Bromine-Radical-Mediated Synthesis of β-Functionalized β,γ- and δ,ε-Unsaturated Ketones via C–H Functionalization of Aldehydes". Synlett 28, № 14 (2017): 1733–37. http://dx.doi.org/10.1055/s-0036-1588494.

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The bromine-radical-mediated allylation reaction of aldehydes was studied. In the presence of V-65 as radical initiator, the reaction of aldehydes with allyl bromides gave β,γ-unsaturated ketones in good yields (13 examples, 45–84%). The reaction is triggered by hydrogen abstraction from the aldehyde by bromine radical to form an acyl radical, which undergoes an SH2′-type addition–elimination reaction with allyl bromides to give coupling products with liberation of bromine radical. Three-component coupling reactions comprising aldehydes, electron-deficient alkenes, and methallyl bromide also proceeded to give δ,ε-unsaturated ketones.

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6

Khalafi-Nezhad, Ali, Abolfath Parhami, Abdolkarim Zare, Amir Nasrolahi Shirazi, Ahmad Reza Moosavi Zare, and Alireza Hassaninejad. "Triarylmethyl chlorides as novel, efficient, and mild organic catalysts for the synthesis of N-sulfonyl imines under neutral conditions." Canadian Journal of Chemistry 86, no. 5 (2008): 456–61. http://dx.doi.org/10.1139/v08-039.

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A highly efficient procedure for the preparation of N-sulfonyl imines via condensation of sulfonamides with aldehydes as well as ketones in the presence of triarylmethyl chlorides as metal-free organo-catalysts at 40 °C is described. The advantages of this class of catalysts over the reported ones are their efficiency and possibility of running reactions in neutral media that makes them suitable for acid-sensitive substrates.Key words: triarylmethyl chloride, N-sulfonyl imine, sulfonamide, aldehyde, ketone.

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7

El-Alali, Abdullah, and Ahmed S. Al-Kamali. "Reactions of 1,3-dipolar aldazines and ketazines with the dipolarophile dimethyl acetylenedicarboxylate." Canadian Journal of Chemistry 80, no. 10 (2002): 1293–301. http://dx.doi.org/10.1139/v02-169.

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The prepared aldazines (aldehyde azines) and ketazines (ketone azines) were allowed to react with 2 mol of the acetylene derivative. The first products formed were pentalene azine derivatives, which in some cases underwent skeletal rearrangment into acyclic tetraene azines. The latter underwent, in the case of some aldazine products, further skeletal rearrangment into N-allyl pyrazoles. The occurence of these rearrangments is dependant on the nature of the aldehydes or ketones used.Key words: dimethyl acetylenedicarboxylate (DMAD), aldazines, ketazines, N-allyl pyrazoles.

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8

Wang, Xiaoxu, Mingyuan Qian, and Bin Yan. "Study on the pollution level and source analysis of aldehydes and ketones in indoor environment based on HPLC platform." E3S Web of Conferences 490 (2024): 01020. http://dx.doi.org/10.1051/e3sconf/202449001020.

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The pollution level of aldehydes and ketones in indoor air, floor, coating, and furniture samples was analyzed by using high-performance liquid chromatography(HPLC). The study showed that 30 rooms were detected with different concentrations of aldehydes and ketones, with an average value of 0.432 mg/m3, mainly including formaldehyde, acetaldehyde, and acrolein/acetone. The average concentrations of aldehydes and ketones in floor, furniture and coating samples were 0.648 mg/m3, 0.590 mg/m3 and 0.341 mg/m3, respectively. Factor analysis and multiple linear regression analysis were used to determine that the contribution rate of aldehydes and ketones pollution caused by floor, coating and furniture samples accounted for 75.4% of indoor pollution. The least square method was used to fit the concentrations of aldehydes and ketones in indoor air and corresponding decorated materials in 10 rooms. The results showed that the pollution of aldehydes and ketones in these 10 rooms was mainly caused by coating, as well as floor and furniture materials dominated by wood products.

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9

Hande, Akshay Ekanath, Vinay Bapu Ramesh, and Kandikere Ramaiah Prabhu. "Rh(iii)-Catalyzed ortho-C-(sp2)–H amidation of ketones and aldehydes under synergistic ligand-accelerated catalysis." Chemical Communications 54, no. 85 (2018): 12113–16. http://dx.doi.org/10.1039/c8cc07006g.

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Rh(iii)-Catalyzed ortho-C–H amidation of ketones and aldehydes under cooperative metal organocatalysis has been utilized for synthesizing various ortho-amidocarbonyl analogs, and the reaction for the aldehyde proceeds >at ambient temperature.

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10

Liu, Xiaozhu, Yinfeng Li, Jichuang Zhou, and Mingzheng Huang. "Effects of co-inoculation and sequential inoculation of Wickerhamomyces anomalus and Saccharomyces cerevisiae on the physicochemical properties and aromatic characteristics of longan (Dimocarpus longan Lour.) wine." Quality Assurance and Safety of Crops & Foods 13, no. 2 (2021): 56–66. http://dx.doi.org/10.15586/qas.v13i2.893.

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Wickerhamomyces anomalus and Saccharomyces cerevisiae were mixed by co-inoculation or sequential inocula-tion, and the physicochemical properties, electronic sensory characteristics, and aromatic characteristics of longan (Dimocarpus longan Lour.) wine were evaluated to analyze the effects of mixed fermentation on wine quality. The results demonstrate that mixed fermentation obtained by co-inoculation or sequential inoculation decreases the alcohol content of longan wine. Furthermore, mixed fermentation also leads to the reduction of the electronic sensory acidity and richness of longan wine. Moreover, the two mixed inoculation methods resulted in different effects on the aromatic characteristics of longan wine. The varieties of aldehyde and ketone aromatic compounds increase in longan wine fermented by co-inoculation, with increasing amounts of acids, aldehydes, ketones, and other compounds, and a decrease in the amounts of ester compounds. However, the variety of ester aromatic compounds and the amounts of acids, aldehydes, and ketones increase when using sequential inoculation. Therefore, the application of mixed fermentation can regulate the physicochemical properties, as well as the electronic sensory characteristics and aromatic characteristics of longan wine, and this contributes to the enrichment of the different types of longan wine.

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Dissertations / Theses on the topic "Aldehydes and ketones"

1

鄧陽招 and Yeung-chiu Dennis Tang. "Accelerated decomposition of peroxynitrite by Ketones and Aldehydes." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31221701.

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Allan, John Fraser. "Reactions of amidomagnesium compounds with ketones and aldehydes." Thesis, University of Strathclyde, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415132.

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Tang, Yeung-chiu Dennis. "Accelerated decomposition of peroxynitrite by Ketones and Aldehydes /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20897145.

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4

Esiringu, Ilker. "Intermolecular Addition Of Aldehydes To Ketones Via Acyl Phosphonates." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609441/index.pdf.

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This thesis presents a new developed method for first intermolecular aldehyde/ketone cross benzoin coupling. Protected &amp<br>#945<br>-keto tertiary alcohols are synthesized starting from easily available acyl phosphonates and ketones via Brook rearrangement in the presence of catalytic amount of cyanide ion. The scopes and the limitations of the methods for the synthesis of tertiary alcohols with &amp<br>#945<br>-keto group are discovered.

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5

Dosa, Peter I. (Peter Ian) 1973. "Catalytic asymmetric addition of organozinc reagents to aldehydes and ketones." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/47412.

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6

Vaismaa, M. (Matti). "Development of benign synthesis of some terminal α-hydroxy ketones and aldehydes". Doctoral thesis, University of Oulu, 2009. http://urn.fi/urn:isbn:9789514291753.

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Abstract The synthesis of α-hydroxy aldehydes and hydroxymethyl ketones as well as their interconversion to each other are discussed in this thesis. The literature survey of the monograph reviews the synthetic methods for the preparation of 1,2-bifunctionalized hydroxy aldehydes and ketones. The keto-aldehyde isomerisation reaction catalyzed by Triosephosphate isomerase enzyme (TIM) and organic compounds that interact with the TIM are also introduced. In addition, the microwave heating techniques in organic syntheses are reviewed. The practical work consists of two entities: The synthesis of new substrate candidates and transition state analogues for a mutated monomeric TIM. These compounds are model compounds for the catalytic activity and the structural studies of the mutated monomeric TIM. The synthesis of the sulphonyl α-hydroxy ketone-based substrate candidates consists of four successive syntheses. The microwave-activation was utilized in the preparation of a carbon-sulphur bond and the synthesis of hydroxymethyl ketones. The improved synthesis of the terminal α-hydroxy ketone functionality with microwave activation is presented. The formation of charged compounds was utilized to improve the absorption of microwave energy of reaction mixtures. The design and the synthetic work were carried out in accordance to principles of green chemistry. The second part of the practical work is the development of an organocatalytic α-oxybenzoylation reaction of aldehydes with high enantiomeric selectivity. This novel method generated enantiomerically pure α-hydroxy aldehydes in the stable benzoate-protected form from achiral starting materials under mild conditions at the presence of air and moisture.

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7

Cooper, Ian Antony. "The production of aldehydes and ketones in COâ†2 cooled nuclear reactors." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317757.

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8

Simpson, Elizabeth Shearer Currie. "Investigation of epoxidation of aldehydes and ketones using sulfoxonium and sulfonium ylides." Thesis, Heriot-Watt University, 1995. http://hdl.handle.net/10399/278.

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9

Beeby, A. "The photochemistry and photophysics of aldehydes, ketones and simple sugars in solution." Thesis, University of East Anglia, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382884.

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10

Fällman, Tove. "Capturing of the carbonyl oxide intermediate in ozonolysis using aldehydes and ketones." Thesis, Uppsala universitet, Institutionen för kemi - BMC, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-226240.

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Books on the topic "Aldehydes and ketones"

1

Hull, L. A. Analysis of aldehydes and ketones in the gas phase. U.S. Environmental Protection Agency, Atmospheric Sciences Research Laboratory, 1985.

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2

Lee, Steger Joette, Radian Corporation, and United States. Environmental Protection Agency, eds. Field validation of the DNPH method for aldehydes and ketones: Final report. Radian Corporation, 1996.

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3

Frenkel, M., and K. N. Marsh, eds. Densities of Phenols, Aldehydes, Ketones, Carboxylic Acids, Amines, Nitriles, and Nitrohydrocarbons. Springer-Verlag, 2002. http://dx.doi.org/10.1007/b76771.

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Beeby, Andrew. The photochemistry and photophysics of aldehydes, ketones and simple sugars in solution. University of East Anglia, 1988.

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5

Schmidtke, Frank. Hochleistungsflüssigkeitschromatographische Bestimmung von Aldehyden, Ketonen und Isocyanaten in Innen- und Aussenluft. [s.n.], 1992.

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6

Geoffrey, Flynn T., Weiner Henry, and International Workshop on Aldehyde Dehydrogenase/Aldehyde Reductase/Alcohol Dehydrogenase (2nd : 1984 : Kingston, Ont.), eds. Enzymology of carbonyl metabolism 2: Aldehyde dehydrogenase, aldo-keto reductase, and alcohol dehydrogenase : proceedings of an international workshop, held in Kingston, Ontario, Canada, July 1-4, 1984. A.R. Liss, 1985.

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7

Crawford, John Gordon. Engine operating parameter effects on speciated aldehyde and ketone emissions from a natural gas fuelled engine. National Library of Canada, 1994.

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8

Padwa, A., V. Aggarwal, J. Richardson, et al. Heteroatom Analogues of Aldehydes and Ketones. Georg Thieme Verlag KG, 2004. http://dx.doi.org/10.1055/sos-sd-027-00000.

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9

Oxidation of Alcohols to Aldehydes and Ketones. Springer-Verlag, 2006. http://dx.doi.org/10.1007/b135954.

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10

Tojo, Gabriel, and Marcos I. Fernandez. Oxidation of Alcohols to Aldehydes and Ketones: A Guide to Current Common Practice (Basic Reactions in Organic Synthesis). Springer, 2006.

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Book chapters on the topic "Aldehydes and ketones"

1

Garcia, Jason S., and Raymond D. Harbison. "Aldehydes and Ketones." In Hamilton & Hardy's Industrial Toxicology. John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781118834015.ch55.

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Went, C. "Aldehydes and Ketones." In Work Out Organic Chemistry. Macmillan Education UK, 1988. http://dx.doi.org/10.1007/978-1-349-09726-5_7.

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Patnaik, Pradyot. "Aldehydes and Ketones." In Handbook of Environmental Analysis. CRC Press, 2017. http://dx.doi.org/10.1201/9781315151946-16.

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Vollhardt, Peter, and Neil Schore. "Aldehydes and Ketones." In Organic Chemistry. Macmillan Learning, 2014. http://dx.doi.org/10.1007/978-1-319-19197-9_17.

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Tucker, William B. "Aldehydes and Ketones." In Organic Chemistry. CRC Press, 2024. http://dx.doi.org/10.1201/9781003479352-19.

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Mizzoni, Renat H. "Pyridine Aldehydes and Ketones." In Chemistry of Heterocyclic Compounds: A Series Of Monographs. John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470186688.ch2.

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Mizzoni, Renat H. "Pyridine Aldehydes and Ketones." In Chemistry of Heterocyclic Compounds: A Series Of Monographs. John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470186695.ch2.

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Remers, William A. "Indole Aldehydes and Ketones." In Chemistry of Heterocyclic Compounds: A Series Of Monographs. John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470186947.ch2.

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Lenhert, Anne G., and Raymond N. Castle. "Pyridazine Aldehydes, Ketones, and Alcohols." In Chemistry of Heterocyclic Compounds: A Series Of Monographs. John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470186985.ch4.

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Cano, Israel, and Piet W. N. M. van Leeuwen. "Selective Hydrogenation of Aldehydes and Ketones." In Recent Advances in Nanoparticle Catalysis. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45823-2_11.

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Conference papers on the topic "Aldehydes and ketones"

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Frenier, Wayne W., and Frederick B. Growcock. "Inhibitors for Chemical Cleaning Solvents; a Review of Recent Literature." In CORROSION 1989. NACE International, 1989. https://doi.org/10.5006/c1989-89440.

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Abstract It is the purpose of this paper to review advances in corrosion inhibition technology that are applicable to chemical cleaning solvents, and which have appeared in the literature since the early 1970’s. We will discuss inhibitor chemicals and processes that have been used with mineral acids (HCl, HF, H2SO4, H3PO4), as well as with organic acids and chelating agents. General categories of inhibitors used in cleaning solvents include amines, quaternary nitrogen compounds, acetylenic alcohols, unsaturated aldehydes and ketones, and reduced sulfur compounds. Special problems that include ferric ion corrosion and cleaning of alloys unique to steam generating equipment also will be reviewed.

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Singh, Preet M., Arthur J. Ragauskas, Jamshad Mahmood, and James R. Keiser. "Corrosion Susceptibility of Different Alloys in Pyrolysis Oils." In CORROSION 2014. NACE International, 2014. https://doi.org/10.5006/c2014-3772.

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Abstract Biomass-derived pyrolysis oils are rich in carbon and can be used as such or can be processed to produce oil compatible with crude oils to be used in production of fuel and chemicals in petroleum refineries. However, pyrolysis oils can be significantly more corrosive compared to traditional fuels. As-produced pyrolysis oils contain a significant amount of oxygen, primarily as a component of water, carboxylic acids, phenols, ketones and aldehydes. As a result of these constituents, bio oils are generally more acidic with a total acid number (TAN) that can reach levels as high as 100mgKOH/g, with the measured pH of bio-oils between 2.3 to 3.5. There is a significant variation in the chemical composition of bio-oils due to the source and procedures used to produce these oils. Extent and mode of corrosion attack also depends on the alloy composition, microstructure, and environmental parameters. If pyrolysis oils are to be successfully used in an existing or a new process stream, it is very important to know their effect on the performance of different alloys used in that equipment. To study this effect, six materials, aluminum Al 1100, copper (Cu), brass (Cu-Zn), carbon steel (CS) 516-G70, austenitic stainless steel (SS) 316L, and two duplex stainless steels (DSS) 2205 and 2101 were tested in different pyrolysis oils. Corrosivity of pyrolysis oils depends on its water content, carboxylic acids, as well as other constituents affecting their TAN.

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Siewert, Inke. "Electroreduction of C=O Bonds in CO2, Ketones, and Aldehydes." In MATSUS23 & Sustainable Technology Forum València (STECH23). FUNDACIO DE LA COMUNITAT VALENCIANA SCITO, 2022. http://dx.doi.org/10.29363/nanoge.matsus.2023.032.

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Shen, Y., and S. Que Hee. "15. Sampling and Analysis of Airborne Environmental Aldehydes and Ketones." In AIHce 1999. AIHA, 1999. http://dx.doi.org/10.3320/1.2762994.

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Movassagh, Barahman, and Ali Yousefi. "Î±-Arylchalcogenation of Aldehydes and Ketones with Diaryl Dichalcogenides Promoted by K3PO4." In The 17th International Electronic Conference on Synthetic Organic Chemistry. MDPI, 2013. http://dx.doi.org/10.3390/ecsoc-17-a041.

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Bigović, Miljan, Marija Kaluđerović, Jovana Jovanović, Haris Majstorović, and Milica Kosović-Perutović. "Synthesis of Schiff bases between some five-membered heterocyclic aldehydes and thiocarbohydrazide (TCH) and optimization of reaction conditions." In 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.435b.

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The usual way of synthesizing imines (Schiff bases) between carbonyl compounds –aldehydes and ketones – with thiocarbohydrazide (TCH) involves heating them for 3 hours in a mixture of water solvents and ethanol with the addition of a catalytic amount of concentrated hydrochloric acid. Heating in the presence of acid catalysts over a long period of time may be unsuitable for acid-sensitive, labile, reactive or thermally unstable aldehydes, which are prone to polymerization under these conditions. We tested the condensation reaction at room temperature with a series of aldehydes, while maintaining the described ratios (equimolar ratio of aldehydes and TCH), with the addition of a few drops of 36% HCl. The course and completion of the reaction were monitored using infrared spectroscopy (FTIR). The reaction time is longer compared to the heating conditions, while the yields are comparable. We obtained a series of compounds of high degree of purity, satisfactory yield varying from 50-90%, whose structure and purity were confirmed by NMR spectroscopy.

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Musleh, Mohammed, and Valentina Diaconu. "Aplicarea pesticidelor bioraționale la plantațiile de piersici în zona centrală a Republicii Moldova." In VIIth International Scientific Conference “Genetics, Physiology and Plant Breeding”. Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2021. http://dx.doi.org/10.53040/gppb7.2021.87.

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Abstract:

In this paper, the results of application of plant extracts, bioelicitors – Reglalg, algae extract – Spi-rogira sp., are shown. A mix of unsaturated fatty acids, aldehydes, ketones and other active components - 0.5 l / ha and Paurin - bacterial preparation (based on Agrobacterium tumefaciens) - 2.0 l / ha, which as growth regulators, contribute to increased peach resistance to different diseases.

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Wiesenthal, K., and S. Que Hee. "221. Determination of Low Molecular Weight Aldehydes and Ketones by High Performance Liquid Chromatography." In AIHce 1997 - Taking Responsibility...Building Tomorrow's Profession Papers. AIHA, 1999. http://dx.doi.org/10.3320/1.2765349.

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Li, Guigen, Han-Xun Wei, and Subramanian Karur. "Halo Aldol Reaction of a,b-Unsaturated Ketones and Aldehydes Mediated by Titanium Tetrachloride." In The 4th International Electronic Conference on Synthetic Organic Chemistry. MDPI, 2000. http://dx.doi.org/10.3390/ecsoc-4-01838.

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Dotsenko, Victor, Andrey Levashov, Dmitriy Buriy, Valeriy Konshin, Inna Aksenova, and Nikolay Aksenov. "Oppenauer-type synthesis of α, β-acetylenic ketones from tetra(phenylethynyl)tin and aromatic aldehydes." In The 21st International Electronic Conference on Synthetic Organic Chemistry. MDPI, 2017. http://dx.doi.org/10.3390/ecsoc-21-04807.

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Reports on the topic "Aldehydes and ketones"

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Suri, Suresh C., and Jacob C. Marcischak. New Application of Bromotrimethylsilane: Elaboration of Aldehydes/Ketones into Homologous Alpha-Beta-Unsaturated Esters via Beta-Hydroxy Esters. Defense Technical Information Center, 2003. http://dx.doi.org/10.21236/ada410496.

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