5 results about "Semicarbazone" patented technology

A compound for corrosion inhibition of a metal is a thiosemicarbazone. A method of inhibition corrosion includes contacting a metal with the thiosemicarbazone and / or a reaction product thereof.

The invention relates to a method for synthesizing lesinurad, which comprises the following steps of: sequentially performing aldehyde-thiosemicarbazide condensation, cyclization, bromination and hydrolysis reaction on a compound 4-cyclopropyl naphthalene-1-formaldehyde as shown in a formula I serving as a raw material to obtain a compound lesinurad as shown in a formula V; according to the invention, a 1, 2, 4-triazole ring is constructed by an innovative strategy of aldehyde-thiosemicarbazide condensation-cyclization, so that tedious steps of a traditional step-by-step process are omitted, and the cyclization yield is increased from 85% to 92%; the method is mild in overall reaction condition, low in equipment damage, simple in process, green and environment-friendly, capable of ensuring continuous production of high-quality products and high in application value.

The present invention relates to the compounds of formula (I), and the N-oxides, stereoisomers, tautomers and agriculturally or veterinarily acceptable salts thereof wherein the variables are defined according to the description, The compounds of formula (I), as well as the N-oxides, stereoisomers, tautomers and The compounds of formula (I), as well as the N-oxides, stereoisomers, tautomers and agriculturally or veterinarily acceptable salts thereof, are useful for combating or controlling invertebrate pests, in particular arthropod pests and nematodes. The invention also relates to a method for controlling invertebrate pests by using these compounds and to plant propagation material and to an agricultural and a veterinary composition comprising said compounds.

Synthesis of a phenylaminourea and its recognition of iron ions. Benzaldehyde and aminourea hydrochloride were used as raw materials, and a carbon-based solid acid was used as a catalyst to synthesize phenylaminourea by grinding in a specific molar ratio. First, A mol of benzaldehyde and C mol of carbon-based solid acid (p-toluenesulfonic acid) were ground in a mortar. Then, B mol of aminourea hydrochloride was added, and grinding continued until the reaction was complete. The reaction progress was monitored by TLC during grinding. The ratio of A:B:C was (1~1.3):1:(0.05~0.2). After the reaction was complete, a small amount of methanol was added to the reaction vessel, and the catalyst was removed by filtration. The filtrate was then distilled under reduced pressure to obtain phenylaminourea. The catalyst was recovered and could be reused up to 5 times. The synthesized probe was prepared into a test solution using a solvent. Different cations were added to the test solution, and the changes in absorbance of the compound were observed by UV-Vis absorption spectroscopy to identify iron ions. 3+ Selective detection is performed; and the probe is effective against Fe. 3+ The detection is quite sensitive and has strong anti-interference capabilities.

A method of forming a corrosion inhibiting composition is disclosed, including performing a simulation of candidate thiosemicarbazone derivative molecules to determine a solubility parameter associated with a structure of the plurality of candidate thiosemicarbazone derivative molecules, selecting one or more bulky substituent groups to react with a thiosemicarbazone based on one or more results of the simulation, adding the one or more bulky substituent group, which may include an amine-functional group, to a reaction vessel. The method also includes generating a dithiocarbamate quaternary ammonium salt including one of the bulky substituent groups and precipitating a thiosemicarbazone derivative having one of the bulky substituent groups. The one or more bulky substituent groups may include a cyclohexyl group, a 2-ethyl group, a 3-ethyl group, such as 2-ethylphenyl and 3-ethylphenyl, or a combination thereof. Additional methods incorporating polar substituent groups and corrosion inhibiting compositions and treatments are also disclosed.