555-16-8Relevant articles and documents
Kinetics and mechanism of oxidation of chloramphenicol - An antibiotic drug by diperiodatocuprate(III) in aqueous alkaline medium
Hosahalli, Rajeshwari V.,Byadagi, Kirthi S.,Nandibewoor, Sharanappa T.,Chimatadar, Shivamurti A.
, p. 79 - 94 (2011)
The kinetics of oxidation of chloramphenicol (CHP) by diperiodatocuprate(III) (DPC) in aqueous alkaline medium at a constant ionic strength of 0.10 mol dm-3 was studied spectrophotometrically. The reaction between DPC and CHP in alkaline medium exhibits 1:2 stoichiometry (CHP: DPC). The main oxidation products were identified by spot test, IR, NMR and GCMS spectral studies. The reaction is of first order in DPC and CHP concentrations. As the alkali concentration increases the rate of reaction increases with fractional order dependence on alkali concentration. Increase in periodate concentration decreases the rate. A suitable mechanism is proposed. The reaction constants involved in the different steps of the mechanism were calculated. The activation parameters with respect to slow step of the mechanism are computed and discussed. Thermodynamic quantities are also determined. by Oldenbourg Wissenschaftsverlag, Munchen.
Selective photocatalytic oxidation of aromatic alcohols in solar-irradiated aqueous suspensions of Pt, Au, Pd and Ag loaded TiO2 catalysts
Yurdakal, Sedat,Tek, Bilge Sina,De?irmenci, ?a?lar,Palmisano, Giovanni
, p. 53 - 59 (2017)
The photocatalytic partial oxidation of 4-methoxybenzyl alcohol (MBA) and 4-nitrobenzyl alcohol (NBA) to corresponding aldehydes or acids was performed in water under simulated solar light at different pH's by using Pt, Au, Pd and Ag loaded Degussa P25 TiO2 catalysts, prepared by photoreduction. Bare Degussa P25 TiO2 was also used as a reference. The metal loaded TiO2 photocatalysts were characterized by XRD, TEM, ESEM and DRS techniques. The best activity and selectivity results were obtained with Pt loaded TiO2. The reactivity results show that metal loading on Degussa P25 sharply promotes the photoactivity and product selectivity towards aldehydes. Moreover, at low pH's very high aldehyde selectivities were determined for both alcohols. MBA oxidation rate was very high at low pH's, whereas an opposite trend was observed for NBA, due to the difference of the substituent group. Only from NBA a significant amount 4-nitrobenzoic acid (ca. 50%) was obtained at high pH values.
Fluoro-tagged osmium and iridium nanoparticles in oxidation reactions
Santacruz, Lynay,Donnici, Silvia,Granados, Albert,Shafir, Alexandr,Vallribera, Adelina
, p. 6890 - 6895 (2018)
Osmium and iridium metal nanoparticles were supported on a fluorous organic-inorganic hybrid material prepared by the sol-gel process. Moreover, we also found that the thermolysis of the Ir4(CO)12 cluster in simply diphenylether also
Zinc chlorochromate nonahydrate [Zn(ClCrO3)2.9H2O] is a useful reagent for the solvent-free and in solution oxidative deprotection of trimethyl- and tert-butyldimethylsilyl ethers
Firouzabadi, Habib,Gholizadeh, Mostafa,Fakourpour, Mahmood
, p. 81 - 87 (1999)
Primary and secondary tert-butyldimethylsilyl and trimethylsilyl ethers are oxidized to their corresponding carbonyl compounds with zinc chlorochromate nonahydrate (ZCCNH) in dichloromethane or under solvent free conditions in good yields. For comparison, we have also studied the reactions with pyridinium chlorochromate (PCC) under similar reaction conditions.
Synthesis of novel oxime functionalized aldol products via Michael addition of oximes onto Baylis-Hillman adducts
Bhuniya, Debnath,Gujjary, Srinivas,Sengupta, Sujata
, p. 151 - 164 (2006)
Triphenylphosphine-catalyzed Michael addition of oximes 2 onto Baylis-Hillman (B-H) adducts 1 led to an easy access to a novel class of oxime functionalized aldol products 3. This demonstrates the first use of an oxygen-centered nucleophile in Michael addition to B-H adducts, without touching any other functional group. Deprotection of oxime in 3 was further demonstrated using molecular hydrogen (1 atm) and 10% Pd/C (cat.) to furnish functionalized 1,3-diols 4 as potentially useful synthons with optional backbone choice (R 3 and EWG). Copyright Taylor & Francis LLC.
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Moffatt,J.G.
, p. 1909 - 1912 (1971)
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Nitroamines, XVI: 4-Nitrobenzyl-n-propylnitroamine
Unterhalt,Leiblein
, p. 726 - 728 (1982)
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Chromium(VI) based oxidants III. Ferric dichromate, polyvinylpyridine supported zinc, and ferric dichromates as new oxidizing agents
Firouzabadi,Tamami,Goudarzian,Hatam,Lakouraj
, p. 2077 - 2088 (1991)
Ferric dichromate, polyvinylpyridine supported zinc and ferric dichromates complexes are prepared and used as stable, mild, and efficient oxidizing reagents for the oxidation of different organic compounds. Ferric dichromate complex is more efficient.
Highly atom efficient synthesis of 2,2,4,5-tetrasubstituted 3(2H)-furanones having both hydroxyl and amino substituents
Antony, Jesna,Mathai, Sindhu,Natarajan, Rakesh,P. Musthafa, Sumi,Rappai, John P.,S. Devaky, Karakkattu
supporting information, (2022/02/25)
We have developed a highly atom efficient synthesis of tetrasubstituted 3(2H)-furanones from easily accessible starting materials such as C,N-diarylaldonitrones and dibenzoylacetylene. Control experiments revealed that reaction of aldonitrones having electron-withdrawing groups on the C-aryl substituent in polar aprotic solvents exhibited high product selectivity while reaction temperature has only a negligible effect on product yield and selectivity.
Microwave Assisted Oxidation of Benzyl Halides to Aldehydes and Ketones with 4-Hydroxypyridinium Nitrate Functionalized Silica Gel in Aqueous Media
Ghalehbandi, Shermineh sadat,Ghazanfari, Dadkhoda,Ahmadi, Sayed Ali,Sheikhhosseini, Enayatollah
, p. 176 - 183 (2021/04/29)
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