4 results about "Iodobenzoic Acids" patented technology

The present application relates to the technical field of corrosion inhibitor, and proposes a thiourea modified imidazoline corrosion inhibitor and a preparation method thereof, which comprises the following components by weight: 40-50 parts of thiourea modified imidazoline, 6-8 parts of isopropyl alcohol, 0.1-0.2 parts of potassium iodide, 10-15 parts of an additive, and 35-40 parts of a solvent; the additive is composed of 2-amino-5-iodobenzoic acid methyl ester and a surfactant. Through the above technical solution, the problem of low corrosion inhibition rate and fast corrosion speed of the thiourea modified imidazoline corrosion inhibitor in the prior art is solved.

This invention discloses a method using arylmethyl ketones and 2-aryl- N This invention relates to a method for synthesizing dihydropyrrole derivatives using toluenesulfonylaziridine as a starting material, belonging to the field of organic synthetic chemistry. The method uses tris(dibenzylacetone)dipalladium (Pd2(dba)3) as a catalyst, and 2-iodobenzoic acid (IBX) and potassium persulfate (K2S2O8) as co-oxidants. N,N Using dimethylformamide (DMF) as both solvent and carbon source, the reaction is carried out in an oil bath at 100℃–120℃ for 15–24 h, followed by post-treatment to obtain dihydropyrrole derivatives. This invention utilizes readily available raw materials, is simple to operate, employs mild reaction conditions, exhibits broad functional group compatibility, provides high product selectivity, and is environmentally friendly. Yields can reach 51%–90%, making it suitable for large-scale preparation of structurally diverse dihydropyrrole derivatives. It has significant application value in drug development, natural product synthesis, and materials chemistry.

The present application relates to a kind of 2-methoxy-4-acetylamino-5-iodobenzoic acid methyl ester preparation method, steps include: S1, by p-aminosalicylic acid and acetic anhydride reaction, preparation 4-acetylamino salicylic acid;S2, by the 4-acetylamino salicylic acid and dimethyl sulfate reaction, preparation 2-methoxy-4-acetylamino benzoic acid methyl ester;S3, by the 2-methoxy-4-acetylamino benzoic acid methyl ester and iodine reaction, preparation 2-methoxy-4-acetylamino-5-iodobenzoic acid methyl ester.The preparation method of the present application is compared with prior art, and reaction step is shortened to three steps, and total yield is as high as 70% or so;While the yield of iodine substitution reaction is increased from 29% to more than 90%.

This invention discloses a method for preparing 2-carboxylic acid diphenyl iodide ester. The method involves using 2-iodobenzoic acid and benzene as raw materials in an acidic solvent, with potassium persulfate and a heteropolyacid metal salt as a mixed catalyst, and controlling the reaction temperature at 10℃~20℃ to synthesize 2-carboxylic acid diphenyl iodide ester. The product is then purified. The mass ratio of 2-iodobenzoic acid, benzene, and the mixed catalyst in this invention is 250:85~95:2~5. The synthetic route is simple, and the purity of the prepared product is over 99.9%, meeting the high purity requirements of electronic chemical raw materials. The yield can reach approximately 90%, demonstrating high industrial application value. Furthermore, the catalyst used in this invention can be recycled, further reducing production costs.