4091-39-8Relevant academic research and scientific papers
Ruthenium sulfophthalocyanine catalyst for the oxidation of chlorinated olefins with hydrogen peroxide
Bressan, Mario,Celli, Nicola,D'Alessandro, Nicola,Liberatore, Lolita,Morvillo, Antonino,Tonucci, Lucia
, p. 416 - 420 (2000)
In aqueous solution and at room temperature, various α-chloro-alkenes are effectively dechlorinated by hydrogen peroxide oxidation using a water-soluble ruthenium(II)-tetrasulfophthalocyanine catalyst, RuPcS. The molecular structure of RuPcS has been elucidated by ESI-mass spectroscopy. In the reaction conditions, and specifically in acidic media, the complex rapidly gives rise to a novel species, most likely catalytically active, whose nature is investigated.
Hydration of Alkynes to Ketones with an Efficient and Practical Polyoxomolybdate-based Cobalt Catalyst
Xie, Ya,Wang, Jingjing,Wang, Yunyun,Han, Sheng,Yu, Han
, p. 4985 - 4989 (2021/10/12)
Hydration of alkynes to ketones is one of the most atom economical and universal methods for the synthesis of carbonyl compounds. However, the basic reaction usually requires organic ligand catalysts or harsh reaction conditions to insert oxygen into the C≡C bond. Here, we report an inorganic ligand supported cobalt (III) catalyst, (NH4)3[CoMo6O18(OH)6], which is supported by a central cobalt (III) mononucleus and a ring-shaped pure inorganic ligand composed of six MoVIO6 octahedrons to avoid the disadvantages of expensive and unrecyclable organic ligand catalysts or noble metal catalysts. Under mild conditions, the cobalt (III) catalyst can be used for the hydration of alkynes to ketones. The catalyst is non-toxic, green, and environment friendly. The catalyst can be recycled at least six times with high activity. According to control experiments, a reasonable mechanism is provided.
A kind of 3,4-dichloro-thiazole derivatives and process for their preparation and use
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Paragraph 0042-0043; 0093-0094, (2016/10/08)
The invention provides 3,4-dichloro isothiazole derivatives, their preparation method and application. The invention relates to a heterocyclic compound containing 3,4-dichloro isothiazol, and the compound is represented by the following chemical structural general formula. The invention discloses the structural general formula of the compound, a synthetic method of the compound and applications of the compound as pesticide, bactericide, anti-plant virus agent, and plant activator, and a technology of mixing the compound with agriculturally acceptable auxiliary agents or synergists for preparing pesticide, bactericide, anti-plant virus agent, and plant activator. The invention further discloses the combined application of the compound and the commercial pesticide, bactericide, anti-plant virus agent, and plant activator in controlling diseases, insect pests, and virus diseases in agriculture, forestry and gardening, and a preparation method of the compound and the commercial pesticide, bactericide, anti-plant virus agent, and plant activator.
A mild method for the replacement of a hydroxyl group by halogen. 1. Scope and chemoselectivity
Munyemana, Fran?ois,George, Isabelle,Devos, Alain,Colens, Alain,Badarau, Eduard,Frisque-Hesbain, Anne-Marie,Loudet, Aurore,Differding, Edmond,Damien, Jean-Marie,Rémion, Jeanine,Van Uytbergen, Jacqueline,Ghosez, Léon
, p. 420 - 430 (2015/12/31)
α-Chloro-, bromo- and iodoenamines, which are readily prepared from the corresponding isobutyramides have been found to be excellent reagents for the transformation of a wide variety of alcohols or carboxylic acids into the corresponding halides. Yields are high and conditions are very mild thus allowing for the presence of sensitive functional groups. The reagents can be easily tuned allowing therefore the selective monohalogenation of polyhydroxylated molecules. The scope and chemoselectivity of the reactions have been studied and reaction mechanisms have been proposed.
Chlorination of various substrates in subcritical carbon tetrachloride
Tanemura, Kiyoshi,Suzuki, Tsuneo,Nishida, Yoko,Horaguchi, Takaaki
experimental part, p. 2881 - 2888 (2010/06/16)
Various aliphatic hydrocarbons and the side chains of aromatic hydrocarbons were chlorinated in subcritical carbon tetrachloride. Chlorination of aromatic compounds including 1,4-disubstituted benzenes was investigated. Ketones and sulfones were stable under the employed conditions. Sulfoxides were converted into sulfides in a low to modest yields. The coupling adducts between olefins and carbon tetrachloride were obtained from the reactions of olefins.
Chlorination of aliphatic hydrocarbons, aromatic compounds, and olefins in subcritical carbon tetrachloride
Tanemura, Kiyoshi,Suzuki, Tsuneo,Nishida, Yoko,Horaguchi, Takaaki
scheme or table, p. 6419 - 6422 (2009/04/06)
The reactions of various substrates including aliphatic hydrocarbons, aromatic compounds, and olefins were investigated in subcritical carbon tetrachloride. Ketones and sulfones were stable under the employed conditions. The coupling adducts between olefins and carbon tetrachloride were obtained from the reactions of olefins.
The effects of ring size and substituents on the rates of acid-catalysed hydrolysis of five- and six-membered ring cyclic ketone acetals
Knowles, Jonathan P.,Whiting, Andrew
, p. 3365 - 3368 (2008/02/10)
A series of sterically similar five- and six-membered ring cyclic diol-derived ketone acetals have been prepared and their rates of acid-catalysed hydrolysis examined. The rates of hydrolysis are substantially affected by acetal ring conformational stereoelectronic effects and resonance effects depending upon the substituents on the parent ketone; an A1 mechanism of hydrolysis explains the observed effects. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.
Rate coefficients and mechanisms of the reaction of Cl-atoms with a series of unsaturated hydrocarbons under atmospheric conditions
Orlando, John J.,Tyndall, Geoffrey S.,Apel, Eric C.,Riemer, Daniel D.,Paulson, Suzanne E.
, p. 334 - 353 (2007/10/03)
The rate coefficients and mechanisms of the reaction of Cl-atoms with a series of unsaturated hydrocarbons under atmospheric conditions were studied. It was observed the product yielded from both trans-2-butene and 1-butene were found to be oxygen dependent. The results showed that the variation of the product yielded with O2 in the case of 1-butene resulted from competitive reaction pathways for the two β-chlorobutoxy radicals involved in the oxidation.
Allenylsilanes fonctionnels: synthese regioselective par voie organoaluminique d'alcools alleniques trimethylsilyles α'- ou ω'-chlores
Mesnard, Danielle,Miginiac, Leone
, p. 299 - 309 (2007/10/02)
In many cases, the reaction between α- or ω-chloro carbonyl derivatives and organoaluminium compound prepared from Me3Si-CC-CH2Br is chemo- and regioselective: it affords, in a good yield, trimethylsilyl α-allenyl alcohols α'- or ω'-substituted by a chlorine atom; some of these functional alcohols have produced oxygenated heterocycles.
