专利号:US-5670465-A 优先权日:1993-01-08 标题 :Preparation of p-fuchsones and synthesis of p-dihydroxylated aromatic compounds therefrom 发明人:COSTANTINI MICHEL; MANAUT DANIEL; MICHELET DANIEL 权利人:RHONE POULENC CHIMIE 摘要:p-Dihydroxylated aromatic compounds are prepared via the oxidation of p-fuchsones, the latter advantageously being synthesized by reacting a phenolic compound having at least one hydrogen atom in the para-position to the hydroxyl function with a non-enolizable ketonic compound, in the presence of a catalytically effective amount of an acid catalyst and, optionally, a cocatalytically effective amount of an ionizable sulfur-containing compound.
专利号:US-10927074-B2 优先权日:2018-03-05 标题:Synthesis of methyl ethyl sulfide and related production systems 发明人:HASENBERG DANIEL M; LASSEN KENNETH M; KREIDER JASON L; HWU HENRY 权利人:CHEVRON PHILLIPS CHEMICAL CO LP 摘要:The present invention discloses processes for producing methyl ethyl sulfide by contacting dimethyl sulfide and diethyl sulfide in the presence of a suitable catalyst. Methyl ethyl sulfide can be used as an odorant in natural gas. Integrated mercaptan and sulfide manufacturing systems and integrated methods for making mercaptans and sulfides also are disclosed.
专利号:WO-2025086625-A1 优先权日:2023-10-26 标题 :Synthesis method for deuterated tinidazole 发明人:MEI SHU; GUO HUI; CHEN WULIAN 权利人:ANPEL LABORATORY TECH SHANGHAI INC 摘要:The present invention relates to a synthesis method for a deuterated tinidazole. The deuterated tinidazole is as represented by formula I, wherein one or more of R 1 -R 5 are deuterium, and the rest is hydrogen. The synthesis method comprises the step of oxidizing an intermediate B with m-chloroperoxybenzoic acid to prepare the deuterated tinidazole, wherein the oxidation is carried out under low-temperature and alkaline conditions; and the intermediate B is as represented by formula II. By using the synthesis method of the present invention, the problems of deuterium shedding and isotope dilution in the reaction process can be avoided, and the stable isotope-labeled deuterated tinidazole with the isotope abundance of > 98% is obtained with a higher yield. The prepared deuterated tinidazole can be used as an isotope internal standard reagent for the quantitative detection of tinidazole, which, for example, can be used to detect residual tinidazole in meat products by means of an isotope internal standard method, and has the advantages of having high recovery efficiency from a matrix, and being environmentally friendly and safe.
专利号:CN-111788178-A 优先权日:2018-03-05 标 题 :Synthesis of methyl ethyl sulfide and related production system
专利号:WO-2019173208-A1 优先权日:2018-03-05 标题:Synthesis of methyl ethyl sulfide and related production systems
专利号:US-2020109111-A1 优先权日:2018-03-05 标 题:Synthesis of Methyl Ethyl Sulfide and Related Production Systems
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