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Showing papers on "Benzaldehyde published in 1983"


Journal ArticleDOI
TL;DR: Barium manganate is a reagent capable of oxidizing organic substrates, converting alcohols to their corresponding carbonyl compounds, aromatic amines to their respective azo compounds, hydroquinone to p-benzoquinone, benzylamine to benzaldehyde, and triphenylphosphine to its oxide in good yields as discussed by the authors.
Abstract: Preparation of barium manganate in large-scale is discussed. It is also shown that this reagent is capable of oxidizing organic substrates, converting alcohols to their corresponding carbonyl compounds, aromatic amines to their corresponding azo compounds, hydroquinone to p-benzoquinone, benzylamine to benzaldehyde, and triphenylphosphine to its oxide in good yields. Saturated hydrocarbons, unsaturated hydrocarbons, unsaturated ketones, and saturated amines are not affected by this reagent in a reasonable reaction time.

140 citations



Journal ArticleDOI
01 Jun 1983-Fuel
TL;DR: In this article, a pyrolysis of anisoles was carried out using small batch autoclaves and it was shown that this rearrangement proceeds via a three-centered intermediate to para-fluorobenzaldehyde.

59 citations



Journal ArticleDOI
TL;DR: Des sulfones alkyliques, allyliques, benzyliques and cyclaniques sont converties en aldehydes et cetones par traitement avec le butyl-lithium suivi de la reaction avec the peroxyde de bis-trimethylsilyle as discussed by the authors.
Abstract: Des sulfones alkyliques, allyliques, benzyliques et cyclaniques sont converties en aldehydes et cetones par traitement avec le butyl-lithium suivi de la reaction avec le peroxyde de bis-trimethylsilyle

54 citations


Journal ArticleDOI
TL;DR: In this article, the authors reported the disproportionation of diphenylcarbinol over alumina to yield benzaldehyde, toluene, and water, in addition to the expected dehydration to the ether.

45 citations


Journal ArticleDOI
TL;DR: Synthese d'(alcene-2'yl-2 tetramethyl) dioxaborolannes-1,3,2(I) a partir d'Alcene -«1»yl-lithium and de (chloromethyl -2 tetramerethyl) Dioxaborolis-1 3,2 Par reaction as discussed by the authors avec des aldehydes, obtention d'alcools homoallyliques
Abstract: Synthese d'(alcene-2'yl-2 tetramethyl) dioxaborolannes-1,3,2(I) a partir d'alcene-«1»yl-lithium et de (chloromethyl-2 tetramethyl) dioxaborolannes-1,3,2 Par reaction de (I) avec des aldehydes, obtention d'alcools homoallyliques

44 citations



Journal ArticleDOI
TL;DR: In this article, the authors presented the ozonation of some of the aromatic compounds frequently found in French surface waters and which have not been the object of fundamental studies in an aqueous medium.
Abstract: This study presents the ozonation of some of the aromatic compounds frequently found in French surface waters and which have not been the object of fundamental studies in an aqueous medium. As far as the reactivity is concerned, we have determined the values of the ozone consumed per initial aromatic consumed (molar ratio, ozone demand), in a semi batch bubble column at slightly acidic pH. As for the ozonation products, the application of specific experimental procedures in high concentration aqueous solution after the use of derivatization reactions, allowed us to isolate (PLC, GC) and identify (GC/HS ; MS, NMR) some degradation products in the cases of benzaldehyde and naphthalene. The following of the development, in dilute aqueous solution of some ozonation products (HPLC, GC), is presented in the cases of styrene, benzaldehyde, naphthalene and diethylphthalate. On the basis of the results obtained, the mechanisms of initial steps of ozonation are examined in the case of styrene, of benzaldeh...

38 citations


Journal ArticleDOI
TL;DR: In this article, the room temperature syntheses of new chelating acyl palladium(II) complexes derived from quinoline-8-carbaldehyde and 2-(dimethylamino)banzaldehyde are described.

35 citations



Journal ArticleDOI
TL;DR: In this paper, the reaction of N-methylanilino acetonitrile avec des aldehydes and la benzophenone, suivie de l'hydrolyse acide des enaminonitriles formes, is described.
Abstract: Cette homologation se fait a partir de la reaction de N-methylanilino acetonitrile avec des aldehydes et la benzophenone, suivie de l'hydrolyse acide des enaminonitriles formes

Journal ArticleDOI
TL;DR: Preparation de l'oxydant et etude de son utilisation lors de loxydation d'alcools et de thiols.
Abstract: Preparation de l'oxydant et etude de son utilisation lors de l'oxydation d'alcools et de thiols

Journal ArticleDOI
TL;DR: The α-substituted allylboronates 4 add to aldehydes giving the high Z-preference the homoallyl alcohols 1 as mentioned in this paper.

Journal ArticleDOI
TL;DR: Homologation de benzaldehydes substitues a l'aide de derives de l'α-diazotoluene is discussed in this article, with emphasis on phenyl-2 acetophenones substituees.
Abstract: Homologation de benzaldehydes substitues a l'aide de derives de l'α-diazotoluene. Obtention de phenyl-2 acetophenones substituees

Journal ArticleDOI
TL;DR: In this article, aryl halide vapor and calcium metal vapor were found to give the corresponding arylscalcium halides, ArCaX (X = F, Cl, and Br), which gave a mixture of 1,1-di-phenylethanol and acetophenone.

Journal ArticleDOI
TL;DR: In this paper, N-dialkyl thioamides can be converted stereoselectively into (Z)N-dialkyl S-trimethylsilylketene S,N acetals 2.

Journal ArticleDOI
TL;DR: The organotin reagent from 1-chloro-3-iodoprop-1-ene and SnCl2 in dimethylformamide reacted with aldehydes by ite chlorine-substituted carbon atom as mentioned in this paper.

Journal ArticleDOI
TL;DR: In this article, the authors show that allyldimesitylborane readily yields an anion that is attacked by electrophiles in a region and stereospecific fashion.

Journal ArticleDOI
TL;DR: In this paper, the effects of oxygen and water on titanium dioxide photocatalyzed oxidation of benzene and toluene were examined, and it was shown that electron transfer from water and benzene to the photogenerated positive holes, synchronized with electron transferred from photoexcited titanium dioxide to oxygen, result in aromatic nuclear hydroxylation giving phenolic products and in oxidation of the side chain of toluenes affording benzyl alcohol and benzaldehyde.
Abstract: Careful examination of the effects of oxygen and water on titanium dioxide photocatalyzed oxidation of benzene and toluene has revealed that electron transfers from water and toluene to the photogenerated positive holes, synchronized with electron transfer from the photoexcited titanium dioxide to oxygen, result, respectively, in aromatic nuclear hydroxylation giving phenolic products and in oxidation of the side chain of toluene affording benzyl alcohol and benzaldehyde.

Journal ArticleDOI
TL;DR: In this paper, it was shown that silver is a very efficient catalyst for the oxidation of chromium(III) to dichromate at a platinum anode in sulphuric acid media.


Journal ArticleDOI
TL;DR: In this paper, the rate constants of gas phase reactions of the hydroxyl radical with β-dimethylstyrene and acetone have been determined by a relative method at 298 K.
Abstract: The rate constants of gas-phase reactions of the hydroxyl radical with β-dimethylstyrene and acetone have been determined by a relative method at 298 K. The values obtained are β-dimethylstyrene (3.3 ± 0.5) × 10−11 cm3/molecule·s and acetone (6.6 ± 0.9) × 10−13 cm3/molecule·s. A simplified kinetic treatment of the experimental data shows that β-dimethylstyrene is stoichiometrically converted to benzaldehyde and acetone. In the photooxidation study of benzaldehyde, carbon dioxide was the only detected product. The ratio between carbon dioxide produced and benzaldehyde reacted was ≥1.

Journal ArticleDOI
TL;DR: In this article, the homomolecular esterification of benzaldehyde has been carried out under mild conditions using RhH(PPh3)4 as a catalytic species and slowly transferring its hydrogen ligand to benzaldehyde to form benzyl alcohol in concentration less than half of that of the catalyst.

Journal ArticleDOI
TL;DR: In this article, electron transfer photooxygenation of 1-butyl-1,2,3-diphenylaziridine with 9,10-dicyanoanthracene in oxygen-saturated acetonitrile yields 4- butyl-3,5-dimethyl-1.2,4-dioxazolidine.

Journal ArticleDOI
TL;DR: In this paper, three bimetallic anionic complexes, (1) lithium triethylboron hydride with the corresponding neutral metal carbonyl dimers, (2) dimanganese nonacarbonyl formyl/sup -/, (3) lithium + rhenium manganese nacaroencaronyl and (4) lithium plus cisdirhenium nonacarhenium formyl formyl, are prepared by the reaction of lithium triethyboron hydroxide with neutral metal dimers.
Abstract: Three bimetallic anionic complexes, (2) lithium + dimanganese nonacarbonyl formyl/sup -/, (3) lithium + rhenium manganese nonacarbonyl formyl/sup -/, and (4) lithium + cisdirhenium nonacarbonyl formyl, are prepared by the reaction of lithium triethylboron hydride with the corresponding neutral metal carbonyl dimers, dimanganese decacarbonyl and manganese rhenium decarbonyl. 2 has a half-life of ca 8 min at room temperature, 4 is stable for days and is easily isolated as a tetrahydrofuran solvate. When 2 - 4 are treated with electrophiles such as benzaldehyde, iron pentacarbonyl, n-octyl iodide, hydride transfer occurs to produce benzyl alcohol, lithium + iron tetracarbonyl formyl/sup -/ complex, and octane, respectively. 3 is the weakest hydride donor. Reaction of 4 with methyl iodide produces ca 52% methane. The only identifiable product from the pyrolysis of 4 is dirhenium decacarbonyl; photolysis of 4 produces lithium + dirhenium nonacarbonyl hydride. 1 figure.

Journal ArticleDOI
TL;DR: In this paper, the reaction of PhLnI complexes (Ln-Eu, Sm, Yb) with N,N-dimethylbenzamide gave benzophenone in good yields.



Journal ArticleDOI
TL;DR: In this article, the reaction of α-lithiated dichloromethyltrimethylsilane with aldehydes followed by hydrolysis was shown to yield 1,1-dichloroalkenes.