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Relevant bibliographies by topics / Chlorination of α

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Academic literature on the topic 'Chlorination of α'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "Chlorination of α"

1

Guthrie, J. Peter, and John Cossar. "The chlorination of isobutyrophenone: determination of its pKa value and of the course of the reaction." Canadian Journal of Chemistry 68, no. 3 (1990): 397–403. http://dx.doi.org/10.1139/v90-061.

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Chlorination of isobutyrophenone in alkaline aqueous solution leads to formation of α-hydroxyisobutyrophenone as the first detectable intermediate; a slow subsequent oxidation gives benzoate. From the rates of the initial chlorinations we have been able to determine the pKa value for the ketone as 18.18 ± 0.50. α-Chloroisobutyrophenone undergoes surprisingly rapid alkaline hydrolysis, kOH = 71.9 ± 1.5 M−1 s−1. Keywords: isobutyrophenone, chlorination, enolization, pKa, hydrolysis.

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Tabolin, Andrey A., Anastasia A. Fadeeva та Sema L. Ioffe. "Chlorination of Conjugated Nitroalkenes with PhICl2 and SO2Cl2 for the Synthesis of α-Chloronitroalkenes". Synthesis 52, № 18 (2020): 2679–88. http://dx.doi.org/10.1055/s-0040-1707396.

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Chlorination of conjugated nitroalkenes with iodobenzene dichloride or sulfuryl chloride to give target α-chloronitroalkenes in good yields is described. Details of the procedure depend on the donating ability of the nitroalkene substituents. The activity of the described chlorinating agents increases in order ‘PhICl2/Py’ < ‘SO2Cl2’ < ‘SO2Cl2/HCl’ with the former producing the best yields for highly donating substrates and the latter for non-activated groups. An autocatalytic role of hydrogen chloride and the chemoselectivity of chlorination were also demonstrated.

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3

Stamhuis, Eize J., Henk Maatman, and Geert E. H. Joosten. "Reactions of alicyclic ketones in carbon tetrachloride. II. Kinetics of the chlorination of 2-chlorocyclopentanone and 2-chlorocyclohexanone, catalyzed by hydrogen chloride." Canadian Journal of Chemistry 64, no. 9 (1986): 1690–96. http://dx.doi.org/10.1139/v86-278.

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The kinetics of the direct chlorination of 2-chlorocyclopentanone (2-mccp) and 2-chlorocyclohexanone (2-mcch) in carbon tetrachloride, catalyzed by hydrogen chloride, were studied. Reaction products are all the possible 2,2-, 2,5-, and 2,6-dichloro compounds. The ratios depend on the concentrations of the monochloro compound and hydrogen chloride. Surprisingly, even at conversions of the monochloro compound as low as 2%, 2,2,5-trichlorocyclopentanone and 2,2,6-trichlorocyclohexanone, respectively, are also formed. The chlorination reaction of both monochloro ketones shows zero order in chlorin

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4

Xue, Da, Yuna Li, Jisheng Liu та ін. "Mechanism of Chlorination Process: From Propanoic Acid to α-Chloropropanoic Acid and Byproducts Using Propanoic Anhydride as Catalyst". Journal of Chemistry 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/1307541.

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This article reports on findings regarding the mechanism of chlorination process. In this experiment, propanoic acid was chlorinated to α-chloropropanoic acid in a lab-scale glass tube reactor operating at 130°C. Propanoic anhydride and concentrated sulfuric acid were, respectively, used as the catalyst and the promoter. This experiment adopted the DFT method to calculate the activation energy of routes for the synthesis α-chloropropanoic acid, β-chloropropanoic acid, α,α-dichloropropanoic acid, and α,β-dichloropropanoic acid. The results showed that the main route of α-chloropropanoic acid wa

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Dalla Croce, Piero, Raffaella Ferraccioli та Alberto Ritieni. "Selective α-Chlorination of Acetylpyrroles". Synthesis 1990, № 03 (1990): 212–13. http://dx.doi.org/10.1055/s-1990-26833.

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6

De Luca, Lidia, Luca Ledda, Andrea Porcheddu, Massimo Carraro, Luisa Pisano та Silvia Gaspa. "Metal-Free Synthesis of α-H Chlorine Alkylaromatic Hydrocarbons Driven by Visible Light". Molecules 30, № 2 (2025): 312. https://doi.org/10.3390/molecules30020312.

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Chlorination is a widely used strategy at the industrial level. Chlorinated products represent indispensable building blocks in synthetic chemistry. Here, we report the synthesis of benzyl chlorides and α-chloro alkyl arenes, mediated by visible light, starting from variously substituted toluenes and N,N-dichloroacetamide as a chlorinating reagent. This methodology is a valid alternative to the syntheses previously reported in the literature. It is a metal-free process and does not involve the use of additives or radical initiators.

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7

Kam, Mei Kee, Akira Sugiyama, Ryouta Kawanishi та Kazutaka Shibatomi. "Asymmetric Synthesis of Tertiary α -Hydroxyketones by Enantioselective Decarboxylative Chlorination and Subsequent Nucleophilic Substitution". Molecules 25, № 17 (2020): 3902. http://dx.doi.org/10.3390/molecules25173902.

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Chiral tertiary α-hydroxyketones were synthesized with high enantiopurity by asymmetric decarboxylative chlorination and subsequent nucleophilic substitution. We recently reported the asymmetric decarboxylative chlorination of β-ketocarboxylic acids in the presence of a chiral primary amine catalyst to obtain α-chloroketones with high enantiopurity. Here, we found that nucleophilic substitution of the resulting α-chloroketones with tetrabutylammonium hydroxide yielded the corresponding α-hydroxyketones without loss of enantiopurity. The reaction proceeded smoothly even at a tertiary carbon. Th

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8

Guthrie, J. Peter, and John Cossar. "The chlorination of propiophenone; determination of pKa value and of the course of the reaction." Canadian Journal of Chemistry 68, no. 11 (1990): 2060–69. http://dx.doi.org/10.1139/v90-315.

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Chlorination of propiophenone in alkaline aqueous solution leads to formation of α-hydroxypropiophenone as the first detectable intermediate; this undergoes slower oxidation to aromatic acids without any accumulation of further intermediates. From the rates of the initial chlorination we have been able to determine the pKa value as 17.56 ± 0.51. Keywords: propiophenone, chlorination, hydrolysis, rearrangement, pKa.

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9

Karama, Usama. "One-pot synthesis of (E)-α-chloro-α,β-unsaturated esters". Journal of Chemical Research 2009, № 7 (2009): 405–6. http://dx.doi.org/10.3184/030823409x460678.

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Chlorination of a phosphonate anion derived in situ from methyl bis(2,2,2-trifluoroethoxy)phosphonoacetate 2 followed by the addition of aldehydes constitutes a stereoselective single flask procedure for the preparation of E-configured α-chloro-α,β-unsaturated esters.

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10

Webster, W. "The chlorination of α-chloroethylbenzene. II". Journal of Applied Chemistry 3, № 8 (2007): 345–50. http://dx.doi.org/10.1002/jctb.5010030803.

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Dissertations / Theses on the topic "Chlorination of α"

1

Menger, Martina [Verfasser]. "Sclareolide as a building block for natural product syntheses and Mechanistic studies on the α-chlorination of aldehydes / Martina Menger". Berlin : Freie Universität Berlin, 2018. http://d-nb.info/1176636227/34.

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Book chapters on the topic "Chlorination of α"

1

MacMillan, D. W. C., and A. J. B. Watson. "α-Chlorination Reactions." In Stereoselective Pericyclic Reactions, Cross Coupling, and C—H and C—X Activation. Georg Thieme Verlag KG, 2011. http://dx.doi.org/10.1055/sos-sd-203-00460.

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Mukherjee, S. "α-Chlorination of Aldehydes." In Lewis Base and Acid Catalysts. Georg Thieme Verlag KG, 2012. http://dx.doi.org/10.1055/sos-sd-204-00099.

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Mukherjee, S. "α-Chlorination of Ketones." In Lewis Base and Acid Catalysts. Georg Thieme Verlag KG, 2012. http://dx.doi.org/10.1055/sos-sd-204-00100.

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MacMillan, D. W. C., and T. D. Beeson. "α-Chlorination of Aldehydes." In Lewis Base and Acid Catalysts. Georg Thieme Verlag KG, 2012. http://dx.doi.org/10.1055/sos-sd-204-00128.

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Hof, K., K. M. Lippert, and P. R. Schreiner. "α-Chlorination of Aldehydes." In Brønsted Base and Acid Catalysts, and Additional Topics. Georg Thieme Verlag KG, 2012. http://dx.doi.org/10.1055/sos-sd-205-00297.

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Parrain, J. L., and J. Thibonnet. "Chlorination of α-Alkoxy Ketones." In Ketones. Georg Thieme Verlag KG, 2005. http://dx.doi.org/10.1055/sos-sd-026-00647.

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Parrain, J. L., and J. Thibonnet. "Chlorination of α-Amino Ketones." In Ketones. Georg Thieme Verlag KG, 2005. http://dx.doi.org/10.1055/sos-sd-026-00661.

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Mukherjee, S. "α-Chlorination of Carbonyl Compounds." In Lewis Base and Acid Catalysts. Georg Thieme Verlag KG, 2012. http://dx.doi.org/10.1055/sos-sd-204-00098.

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Chen, S., E. C. Salo, and N. J. Kerrigan. "α-Chlorination of Monosubstituted Ketenes." In Lewis Base and Acid Catalysts. Georg Thieme Verlag KG, 2012. http://dx.doi.org/10.1055/sos-sd-204-00226.

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Chen, S., E. C. Salo, and N. J. Kerrigan. "α-Chlorination of Disubstituted Ketenes." In Lewis Base and Acid Catalysts. Georg Thieme Verlag KG, 2012. http://dx.doi.org/10.1055/sos-sd-204-00228.

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