1157-84-2Relevant articles and documents
H2SO4/SiO2 as an efficient catalyst for the preparation of phenylhydrazones and 2,4-dinitrophenylhydrazones under solvent-free conditions
Kiasat, Ali Reza,Kazemi, Foad,Nourbakhsh, Kazem
, p. 569 - 573 (2004)
H2SO4 mixed with silica gel (1:1) by weight produces a white powder which is an effective catalyst for the conversion of carbonyl compounds to their corresponding phenylhydrazones and 2,4-dintrophenylhydrazones under solvent-free conditions.
Chemistry of the ephedrine spot test based on its pyrolytic oxidation to acetaldehyde by sodium bismuthate.
Chafetz,Elefant,Amin
, p. 1528 - 1529 (1967)
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A small molecule that mimics the metabolic activity of copper-containing amine oxidases (CuAOs) toward physiological mono- and polyamines
Largeron, Martine,Fleury, Maurice-Bernard,Strolin Benedetti, Margherita
, p. 3796 - 3800 (2010)
Primary aliphatic biogenic amines have been successfully oxidized using a quinonoid species that mimics the metabolic activity of copper-containing amine oxidase (CuAO) enzymes. Especially, high catalytic performances were observed with aminoacetone, a threonine catabolite, and methylamine, a metabolite of adrenaline, and with the primary amino groups of putrescine and spermidine which are both decarboxylation products of ornithine and S-adenosyl-methionine. Furthermore, contrary to flavine adenine dinucleotide (FAD)-dependent amine oxidase enzymes, no activity was found toward secondary and tertiary amines.
Benzaldehyde 2,4-dinitrophenyl-hydrazone
Shan, Shang,Xu, Duan-Jun,Hung, Chen-Hsiung,Wu, Jing-Yun,Chiang, Michael Y.
, p. o135-o136 (2003)
Crystals of the title compound, C13H10N4O4, were obtained from a condensation reaction of benzaldehyde and 2,4-dinitrophenylhydrazine. The molecule assumes an approximately planar E configuration. Within the din
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Ho
, p. 560 (1972)
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Preparation, structure, and oxidative reactivity of (dichloroiodo)pyridines: Recyclable hypervalent iodine reagents
Yoshimura, Akira,Nguyen, Khiem C.,Nemykin, Victor N.,Zhdankin, Viktor V.
, p. 40 - 49 (2017)
New pyridine-based hypervalent iodine reagents, (dichloroiodo)pyridines, were prepared by chlorination of 2-, 3-, or 4-iodopyridines with NaOCl-HCl at room temperature. Structures of 2-(dichloroiodo)pyridine and 2-(dichloroiodo)-3-propoxypyridine were established by X-ray crystallography. The new (dichloroiodo)pyridines can be used as efficient reagents for oxidation of alcohols to carbonyl compounds and also as chlorinating reagents. The reduced form of the reagents such as 2-iodo-3-propoxypyridine, can be recovered from the reaction mixture in good yields by an acid-base liquid-liquid biphasic protocol.
The oxidation of Schiff bases of pyridoxal and pyridoxal phosphate with amino acids by manganous ions and peroxidase.
Hill,Mann
, p. 454 - 468 (1966)
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Highly efficient RuCl3-catalyzed disproportionation of (diacetoxyiodo)benzene to iodylbenzene and iodobenzene; leading to the efficient oxidation of alcohols to carbonyl compounds
Yusubov, Mekhman S.,Chi, Ki-Whan,Park, Joo Yeon,Karimov, Rashad,Zhdankin, Viktor V.
, p. 6305 - 6308 (2006)
(Diacetoxyiodo)benzene (DIB) selectively oxidizes primary and secondary alcohols to the respective carbonyl compounds in the presence of RuCl3 (0.8-1.0 mol %) at room temperature in aqueous acetonitrile. This reaction proceeds via an initial instantaneous Ru-catalyzed disproportionation of DIB to iodobenzene and iodylbenzene with the latter acting as the actual stoichiometric oxidant toward alcohols.
Novel Synthesis and Properties of 1,6-Methanocycloundeca[b]pyrimido[5,4-d]pyrrole-12,14-dione Derivatives: Autorecycling Oxidation of Some Amines and Alcohols
Mitsumoto, Yuhki,Nitta, Makoto
, p. 1256 - 1261 (2004)
Novel 1,6-methanocycloundeca[b]pyrimido[5,4-d]pyrrole-12,14-dione derivatives 6a,b and 7a-c were synthesized in moderate to good yields by the enamine alkylation and dehydrating condensation reactions of 11-chloro-3,8-methano [11] annulenone (8) with 6-amino-3-substituted uracil derivatives and subsequent elimination of HCl. The 1H NMR spectra clarified that compounds 6a,b and 7a-c are aromatic molecules having a diatropic π-system, which is suggested by the chemical shifts of the bridge methylene protons and peripheral protons. The electrochemical reduction exhibited more positive reduction potentials as compared with those of the vinylogous compounds of cyclohepta-[b]pyrimido[5,4-d]pyrrole derivatives. In a search for the oxidizing function of 6a,b and 7a-c, compounds 6a and 7b were demonstrated to oxidize benzylamines, cyclohexylamine, and benzyl alcohol to give the corresponding carbonyl compounds in more than 100% yield under aerobic and photoirradiation conditions, while only benzylamine was oxidized under aerobic and thermal conditions at 100 °C. Thus, compounds 6a and 7b oxidize amines and alcohols in an autorecyling process, and the efficiency is higher under photoirradiation as compared with the thermal process, suggesting the oxidation reaction probably proceeds via electron transfer from amine and alcohol to the excited and ground states of compounds 6a and 7b.
Nitric oxide reacts with methoxide
DeRosa, Frank,Keefer, Larry K.,Hrabie, Joseph A.
, p. 1139 - 1142 (2008)
(Chemical Equation Presented) Despite over a century of reports to the contrary, sodium methoxide has been found to react with nitric oxide (NO). The reaction, whose final organic product is sodium formate, is postulated to occur via an intermediate O-bound diazeniumdiolate [CH3O-N(O)=NO -] that decomposes to formaldehyde and nitrous oxide. Sodium formate forms from the aldehyde via a Cannizzaro reaction. Carboxylate salts have similarly been obtained by exposing sodium benzylate and sodium neopentoxide to NO in dioxane solution. Accordingly, sodium trimethylsilanoate should be considered as a substitute for sodium methoxide as the base used to accomplish the replacement of active hydrogens by the diazeniumdiolate functional group via the Traube reaction.
Selective ligand-free cobalt-catalysed reduction of esters to aldehydes or alcohols
Rysak, Vincent,Descamps-Mandine, Armel,Simon, Pardis,Blanchard, Florent,Burylo, Laurence,Trentesaux, Martine,Vandewalle, Maxence,Collière, Vincent,Agbossou-Niedercorn, Francine,Michon, Christophe
, p. 3504 - 3512 (2018/07/29)
Cobalt(ii) salts combined with NaBHEt3 and eventually a base catalyse efficiently and selectively the reduction of esters to aldehydes or alcohols through hydrosilylation by using phenylsilane. Catalyst characterisation by XRD, XPS, TEM and STEM analyses indicates the materials were partially crystalline with the presence of cobalt nanoparticles. Control experiments suggested low valent Co(0) was the active catalytic species involved.
