- Ionic Liquids Catalyzed Friedel–Crafts Alkylation of Substituted Benzenes with CCl4 Toward Trichloromethylarenes
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Abstract: An ionic liquid catalyzed Friedel–Crafts alkylation reaction of substituted benzenes with CCl4 was developed. The reaction proceeded efficiently under mild conditions, gave corresponding trichloromethylarenes with diversity functional groups in moderate to good yields. The influence of Lewis acidity of ionic liquids on the conversion of the alkylation reaction has been investigated. Notably, the probable mechanism of this reaction has been proposed with the assistance of 27Al NMR spectroscopy. It was noteworthy that the predominance of [Al2Cl7]? species in EmimCl–AlCl3, N = 0.67 could be detected by 27Al NMR spectral analysis, and [AlCl4]? was generated at the beginning of reaction. Additionally, it was found that [AlCl4]? could be transformed into [Al2Cl7]? when the reaction finished. Some control experiments confirmed that the interaction between Lewis acidic species [Al2Cl7]? of the ionic liquid and CCl4 led to the change in speciation of aluminum during the alkylation reactions. Graphical Abstract: [Figure not available: see fulltext.].
- Lyu, Xinyu,Wang, Wencheng,Sun, Yiqun,Zhao, Qian,Qiu, Tao
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p. 665 - 671
(2019/01/04)
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- Substituted arene formyl chloride synthesis method
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The invention relates to the technical field of synthesis of fine chemical intermediates, particularly to a substituted arene formyl chloride synthesis method, which comprises: carrying out a reactionon substituted arene formic acid and substituted trichloromethyl arene under the action of a catalyst 3 to obtain the substituted arene formyl chloride. According to the present invention, the synthesis method has characteristics of inexpensive and easily-available raw materials, short process route, good production safety, easy separation of catalyst, high atomic utilization rate, less waste acid discharge, simple post-treatment, high yield and good quality, and is suitable for industrial continuous production.
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Paragraph 0089; 0091; 0097; 0099
(2019/04/18)
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- The preparation method of compound acyl method
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The invention relates to the technical field of radiation polymerization curing novel materials, and especially relates to a chemical preparation novel process of an acyl phosphine (oxide) compound represented by the general formula (I). A core characteristic of the method is that: a Grignard reagent of an aromatic compound substituted by an appropriate trichloromethyl group is subjected to condensation with related (substituted) phosphorus halide, such that a critical phosphorus-carbon bond is obtained. The innovativeness, cost economic competitiveness, and environment-friendliness of the process and chemical reaction technology provided by the invention are substantially advantaged than those of literatures and existing process routes.
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Paragraph 0024-0026
(2017/03/08)
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- ( benzoin phosphine oxygen radical ) (are three a phenyl) methanone and ( benzene phosphine oxygen radical ) double (are three a phenyl methanone) method for the preparation of
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The invention relates to the technical field of optical radiation free-radical polymerized new materials, especially to a novel synthesis technological process of commercial photoinitiator compounds of (diphenylphosphine oxide)(mesitylene)ketone and (phenylphosphine oxide)bis(mesitylene ketone). According to the invention, 1,3,5-trimethyl-2-(trichloromethyl)-benzene is used as a key raw material and is respectively subjected to a condensation reaction with corresponding organic phosphine precursors so as to prepare the target compounds. In comparison with a known technological route, the technology disclosed in the application has significant advantages such as novelty of the chemical reaction process, economical cost, competitiveness and environmental friendliness.
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Paragraph 0019; 0020
(2017/04/07)
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- METHOD FOR PRODUCING SUBSTITUTED ARYLCARBOXYLIC ACID CHLORIDES
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The invention relates to a method for producing arylcarboxylic acid chlorides (I) substituted at least once by aryl (C1-C20) and/or halogen consisting, at a first stage thereof, in reacting an aromatic compound (II) substituted at least once by alkyl (C1-C20) and/or halogen with CCl4 in the presence of a Friedel-craft catalyst in such a way that corresponding trichlormethylated aromatic compounds (III) at least once substituted by aryl (C1-C20) and/or halogen are obtainable. At a second stage, the trichlormethylated aromatic compound (III) is treated with water or a proton acid in the presence of a catalyst, whereby making it possible to obtain an arylcarboxylic acid chloride (I). In the preferred embodiment, said trichlormethylated aromatic compound (III) is not isolated in the form of an intermediate product and, at the second stage used dissolved in the solvent of the first stage.
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Page/Page column 9; 10
(2008/06/13)
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- An N.M.R. Investigation of the Mills-Nixon Effect
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The 4J coupling constant, previously established as a probe of bond order, was used to examine the bond orders in a series of ortho-bridged compounds: benzocyclopropene, 1,2-dihydrobenzocyclobutene, indan and tetralin.No evidence for sterically induced bond fixation (i.e. the Mills-Nixon effect) was found, but some evidence for electronic distortion in the corresponding benzylic ketones was observed.The experimental results are in accord with SCF/MO calculations.
- Collins, Michael J.,Gready, Jill E.,Sternhell, Sever,Tansey, Charles W.
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p. 1547 - 1557
(2007/10/02)
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