- Supramolecular interactions in the adduct of di-triethylammonium, tetrachlorobenzene-1,4-dicarboxylate and tetrachlorobenzene-1,4-dicarboxylic acid
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The adduct of di-triethylammonium, tetrachlorobenzene-1,4-dicarboxylate and tetrachlorobenzene-1,4-dicarboxylic acid, i.e. {2(C2H 5)3NH+ C8Cl4O 4 2- H2Csub
- Lan, Fei-Fei,Xu, Xiao-Bin,Yang, Shi-Yao,Huang, Rong-Bing
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Read Online
- 2, 3, 5, 6 - Tetrachloro - 1, 4 - benzenedicarboxylic acid dimethyl manufacturing method
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2, 3, 5, 6 - Tetrachloro - 1, 4 - benzenedicarboxylic acid dimethyl [to] horticultural herbicide useful in manufacturing, compared with conventional methods such as reducing environmentally harmful byproducts of hexachlorobenzene penta- chlorobenzene or content, can be efficiently manufactured in an industrial method. (I) formula [a]The manufacturing method of the compound represented, 2, 3, 5, 6 - tetrachloro - 1, 4 - benzenedicarboxylic acid (a), a ketone-based solvent in the presence of a hydrous alkali carbonate, prepared by reacting dimethyl sulfate, formula (I) compounds represented by the process to obtain the crystal, and (b) the crystal was washed with warm water of 30 a-°C 100, then further washed with an organic solvent comprising 30 a-°C 80, said method. [Drawing] no
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Paragraph 0047-0048; 0055-0056; 0058-0059; 0066
(2021/04/29)
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- CARBOXYLATION CATALYSTS
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The use of a complex of the form Z—M—OR in the carboxylation of a substrate is described. The group Z is a two-electron donor ligand, M is a metal and OR is selected from the group consisting of OH, alkoxy and aryloxy. The substrate may be carboxylated at a C—H or N—H bond. The metal M may be copper, silver or gold. The two-electron donor ligand may be a phosphine, a carbene or a phosphite ligand. Also described are methods of manufacture of the complexes and methods for preparing isotopically labelled caboxylic acids and carboxylic acid derivatives.
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Paragraph 0093; 0095
(2013/04/13)
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- Carboxylation of C-H bonds using N -heterocyclic carbene gold(I) complexes
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A highly efficient [(NHC)AuI]-based (NHC = N-heterocyclic carbene) catalytic system for the carboxylation of aromatic and heteroaromatic C-H bonds was developed. The significant base strength of the Au-OH species is at the origin of the activation process and permits the facile functionalization of C-H bonds without the use of other organometallic reagents.
- Boogaerts, Ine I. F.,Nolan, Steven P.
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supporting information; experimental part
p. 8858 - 8859
(2010/08/21)
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- Process for producing 2, 3, 5, 6-tetrachloro-1, 4-benzenedicarboxylic acid
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A process for producing 2,3,5,6-tetrachloro-1,4-benzenedicarboxylic acid, comprising heating 2,3,5,6-tetrachloro-1,4-benzenedicarboxamide together with sulfuric acid exhibiting an acidity function (—Ho) of 10.27 to 14.44 in the presence of water contained
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- Electrocarboxylation of chlorinated aromatic compounds
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Chorinated benzenes (1, 4), biphenyls (6, 9), dibenzofurans (10, 15, 17, 18), 2-chlorodibenzo[1,4]dioxine (24) and 1-chloronaphthalene (26) as well as dibenzofuran (12) and naphthalene (27) themselves were transformed into carboxylic acids by galvanostatic electroreduction in the presence of carbon dioxide ("electrocarboxylation"). Dry DMF was used as solvent, zinc or stainless steel as cathode and magnesium as a sacrificial anode in an undivided cell. Hydrogenation of aromatic rings was not observed. However, reductive addition of two molecules of carbon dioxide to form dihydrodicarboxylic acids, e.g. 22 and 29, occurs in the dibenzofuran and naphthalene series.
- Golinske, Dirk,Voss, Juergen,Adiwidjaja, Gunadi
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p. 862 - 880
(2007/10/03)
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