Academic literature on the topic 'Alicyclic ketones'

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Journal articles on the topic "Alicyclic ketones"

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Manikyamba, Prerepa. "Structural effects in the oxidation of ketones by acid iodate." Collection of Czechoslovak Chemical Communications 56, no. 6 (1991): 1279–86. http://dx.doi.org/10.1135/cccc19911279.

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The kinetics of oxidation of aliphatic, alicyclic and aryl alkyl ketones by acid iodate has been studied in aqueous methanol medium. The reaction exhibits first order dependence each on [iodate] and [ketone]. The reaction is acid catalysed and a medium of low dielectric constant is favourable for the oxidation process. The oxidation rates are slower than the enolisation rates of the ketones. The mechanism proposed involves rate limiting attack of IO+2 on the enol form of the ketone leading to the formation of an intermediate carbonium ion which undergoes solvolysis, ultimately leading to the f
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2

Shao, You-Dong, Dan-Dan Han, Wen-Yue Ma, and Dao-Juan Cheng. "Chiral phosphoric acid catalyzed atroposelective and diastereoselective synthesis of 9-aryltetrahydroacridines." Organic Chemistry Frontiers 7, no. 16 (2020): 2255–62. http://dx.doi.org/10.1039/d0qo00534g.

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A chiral phosphoric acid catalyzed atroposelective annulation between 2-aminoaryl ketones and alicyclic ketones has been developed to access a new library of enantioenriched axially chiral 9-aryltetrahydroacridines.
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3

Švec, Petr. "Chlorination of 2,4,6-trichlorophenol in acidic aqueous medium." Collection of Czechoslovak Chemical Communications 50, no. 8 (1985): 1842–51. http://dx.doi.org/10.1135/cccc19851842.

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The course of chlorination of 2,4,6-trichlorophenol (I) in water and approximately 20% sulfuric and hydrochloric acids has been investigated. In all these media the reaction gives primarily 2,4,6,6-tetrachloro-2,4-cyclohexadienone (II) which is subsequently chlorinated under formation of polychlorinated alicyclic ketones or isomerized to give the more stable 2,4,6,6-tetrachloro-2,5-cyclohexadienone (III), the precursor of further arising chlorinated 1,4-benzoquinones. The ratio of the arising polychlorinated alicyclic ketones to chlorinated 1,4-benzoquinones is significantly influenced by conc
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Radhasyam, Panda, and Kumar Acharya Prabhat. "Peroxomonosulfuric acid oxidations : kinetics and mechanism of oxidation of cyclic ketones." Journal of Indian Chemical Society Vol. 82, Jan 2005 (2005): 31–35. https://doi.org/10.5281/zenodo.5823807.

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Department of Chemistry, Khallikote College (Autonomous), Berhampur-760 001, India <em>E-mail</em> : rspanda50@hotmail.com <em>Manuscript received 25 November 2003, revised 27 May 2004, accepted 16 July 2004</em> The kinetics of oxidation of cyclic ketones by peroxomonosulfuric acid (PMSA) have been studied in the pH range 0-9.65. The reaction follows second-order kinetics- first-order each in [PMSA] and [ketone] at constant pH. The observed pH-rate profile has been rationalised invoking HSO<sup>-</sup><sub>5</sub>, SO<sup>2-</sup><sub>5</sub>, the protonated and unprotonated forms of cyclic k
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Yakabe, Shigetaka, Masao Hirano, and Takashi Morimoto. "Alumina-assisted reduction of carbonyl compounds with sodium borohydride in hexane." Canadian Journal of Chemistry 76, no. 12 (1998): 1916–21. http://dx.doi.org/10.1139/v98-204.

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A broad range of aliphatic, alicyclic, and aromatic ketones and aldehydes underwent smooth reduction with a combination of common, inexpensive laboratory reagents, sodium borohydride and chromatographic neutral alumina, in hexane to afford the corresponding alcohols in a selective and high-yielding manner under mild and neutral conditions. The NaBH4-based biphasic system can also successfully be used for the reduction of unsaturated substrates as well as steroidal and highly hindered ketones.
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Yoshizako, Fumiki, Atsuo Nishimura, and Mitsuo Chubachi. "Identification of algal transformation products from alicyclic ketones." Journal of Fermentation and Bioengineering 77, no. 2 (1994): 144–47. http://dx.doi.org/10.1016/0922-338x(94)90313-1.

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Mączka, Wanda Krystyna, and Agnieszka Mironowicz. "Biotransformation of Isoprenoids and Shikimic Acid Derivatives by a Vegetable Enzymatic System." Zeitschrift für Naturforschung C 59, no. 3-4 (2004): 201–4. http://dx.doi.org/10.1515/znc-2004-3-413.

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In biotransformations carried out under similar conditions enzymatic systems from carrot (Daucus carota L.), celeriac (Apium graveolens L. var. rapaceum) and horse-radish (Armoracia lapathifolia Gilib.) hydrolyzed the ester bonds of acetates of phenols or alicyclic alcohols. Nevertheless, methyl esters of aromatic acids did not undergo hydrolysis. Alcohols were oxidized to ketones in a reversible reaction.
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8

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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9

Ali Bawa, Ramadan, and Aya Ramadan Swairi. "Synthesis of Some Alicyclic Oximes and Study of the Expected Conformational Isomerism." Academic Journal of Life Sciences, no. 512 (December 5, 2019): 116–20. http://dx.doi.org/10.32861/ajls.512.116.120.

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Five alicyclic oximes 1 – 5 have been readily synthesized in moderate to good yields. These oximes were obtained through a reaction between the hydroxylamine hydrochloride and a number of alicyclic ketones (cylobutanone, cyclopentanone, cyclohexanone, cycloheptanone and cyclooctanone) under mild reaction conditions. The spectroscopic data confirmed the formation of the first four oximes 1 – 4 as single conformational isomers. However, the cyclooctanone oxime 5 was obtained as a mixture of two conformational isomers with 81% for the major and only 19% for the minor isomer. Such finding could be
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10

Verner, Jiri, and Milan Potacek. "Criss-cross Cycloadditions on Ketazines Derived from Alicyclic Ketones." Molecules 11, no. 1 (2006): 34–42. http://dx.doi.org/10.3390/11010034.

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Book chapters on the topic "Alicyclic ketones"

1

Plaquevent, J. C., D. Cahard, and F. Guillen. "Ring Expansion of Alicyclic Ketones." In Ketones. Georg Thieme Verlag KG, 2005. http://dx.doi.org/10.1055/sos-sd-026-00381.

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"Product Class 1: Aliphatic and Alicyclic Ketones (Excluding Cyclobutanones and Cyclopropanones)." In Category 4, Compounds with Two Carbon Heteroatom Bonds, edited by Cossy. Georg Thieme Verlag, 2005. http://dx.doi.org/10.1055/sos-sd-026-00002.

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Nógrádi, M. "Reaction of a 2-Hydroxybenzaldehyde (Salicylaldehyde) with Aliphatic or Alicyclic α,α′-Bis(methylene) Ketones." In Six-Membered Hetarenes with One Chalcogen. Georg Thieme Verlag KG, 2003. http://dx.doi.org/10.1055/sos-sd-014-00091.

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4

BARTON, D. H. R., F. MCCAPRA, P. J. MAY, and F. THUDIUM. "Long-range Effects in Alicyclic Systems.: Part III. The Relative Rates of Condensation of Some Steroid and Triterpenoid Ketones with Benzaldehyde." In World Scientific Series in 20th Century Chemistry. WORLD SCIENTIFIC / IMPERIAL COLLEGE PRESS, 1996. http://dx.doi.org/10.1142/9789812795984_0012.

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5

Taber, Douglass F. "The Rawal Synthesis of N-Methylwelwitindolinone D Isonitrile." In Organic Synthesis. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199965724.003.0105.

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The complex polycyclic structure of N-methylwelwitindolinone D isonitrile 3 was assigned in 1999. The welwitinines show an intriguing range of biological activity, including reversal of P-glycoprotein-mediated multidrug resistance in human carcinoma cells. Viresh H. Rawal of the University of Chicago described (J. Am. Chem. Soc. 2011, 133, 5798) the first synthesis of 3, using as a key step the Pd-catalyzed cyclization of 1 to 2. The ketone 1 was assembled by the convergent coupling of 7 with 11. The indole 7 was readily available by Batcho-Leimgruber cyclization of commercial 4 to 5. The expe
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Taber, Douglass F. "The Kuwahara Synthesis of Paspalinine." In Organic Synthesis. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190200794.003.0102.

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The hexacyclic indole diterpenoid paspalinine 3, produced by the ergot Claviceps paspali, induces tremors in domestic animals that graze on pasture grass infected by that fungus. Shigefumi Kuwahara of Tohoku University envisioned (Angew. Chem. Int. Ed. 2012, 51, 12833) assembly of the tetracyclic nucleus of 3 by the oxidative cyclization of 1 to 2. The challenge, then, was the assembly of the angularly substituted trans–anti-trans-6-6-5 alicyclic nucleus of 1. The synthesis began with the Wieland-Miescher ketone 4, which is available commercially in enantiomerically pure form. Exposure to ethy
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