- Industrialized synthetic method for halogen benzoic acid derivative
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The invention discloses an industrialized synthetic method for a halogen benzoic acid derivative. The formula (I) of the halogen benzoic acid derivative is shown in the description, wherein a plurality of Rs are alkyls of C1-C20, and a plurality of Xs are halogens; the industrialized synthetic method comprises the following steps that alkyl substituted benzoic acid and water are added into a reaction container, halogen simple substances are added, a heating reaction is performed, the reaction is complete, and post processing is performed to obtain the target product halogen benzoic acid derivative. According to the industrialized synthetic method for the halogen benzoic acid derivative, no solvent needs to be recycled, little consumption is consumed, little waste gas, water and industrialresidues are caused, and by-product haloid acid can be directly sold or used for producing other products; accordingly, the industrialized synthetic method for the halogen benzoic acid derivative is safe, environmentally friendly and low in cost, and therefore the wide industrial application prospect is achieved.
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Paragraph 0058; 0059; 0060; 0061; 0062; 0063; 0064; 0065
(2019/04/26)
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- Method for synthesizing 2,6-dichloro p-toluic acid
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Provided is a method for preparing 2,6-dichloro p-toluic acid. According to the method, p-toluylic acid is adopted as an initial raw material, dichloroacetic acid is adopted as a solvent, and in the presence of tungstate and hydrochloric acid, hydrogen pe
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Paragraph 0006; 0011-0012
(2017/04/03)
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- Proton mobility in 2-substituted 1,3-dichlorobenzenes: "ortho" or "meta" metalation?
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Nine 1,3-dichlorobenzene congeners were selected as model compounds to assess the relative rates of proton abstraction from 4- and 5-positions ("ortho" vs. "meta" metalation). Using lithium 2,2,6,6-tetramethylpiperidide as the basic reagent, the chlorine-adjacent 4-position underwent metalation exclusively. In contrast, attack at the chlorine-remote 5-posi" tion became significant even in the case of moderately sized 2-substituents (such as dimethylamino or ethyl) when secbutyllithium was employed. The "ortho/para" (4-/5-) ratios ranged from 80:20 to 65:35. The more pronounced "meta-orienting" effect of silicon as opposed to carbon substituents can be attributed to dissimilarities in the n polarization of the aromatic ring. Wiley-VCH Verlag GmbH & Co. KGaA, 2006.
- Schlosser, Manfred,Heiss, Christophe,Marzi, Elena,Scopelliti, Rosario
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p. 4398 - 4404
(2007/10/03)
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- Oxidative chlorination, desulphonation, or decarboxylation to synthesize pharmaceutical intermediates: 2,6-Dichlorotoluene, 2,6-dichloroaniline, and 2,6-dichlorophenol
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An alternative manufacturing process scheme was developed for 2,6-dichlorotoluene, 2,6-dichloroaniline, and 2,6-dichlorophenol, involving oxidative chlorination after protection of the starting material in the para position followed by deprotection involving desulphonation or decarboxylation. Oxidative chlorination of 4-methylbenzenesulphonic acid, 4-methylbenzoic acid, 4-aminobenzoic acid, and 4-hydroxybenzoic acid by using HCl-H2O2, and their subsequent desulphonation or decarboxylation, gave a 60-75% yield of the desired product.
- Mukhopadhyay,Chandalia
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- N-acetonylbenzamides and their use as fungicides
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Novel N-acetonylbenzamides and their use in controlling phytopathogenic fungi.
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- N-acetonylbenzamides and their use as fungicides
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Certain N-acetonylbenzamides exhibit low phytotoxicity and are useful for control of a wide range of fungi, including phytopathogenic fungi of the classes Oomycetes, Ascomycetes, Deuteromycetes and Basidiomycetes.
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