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专利信息

专利号:US-12162849-B2
优先权日:2018-12-21
标题 :Synthesis of 3-methyl-1,2,4-thiadiazole-5-carbohydrazide or of the methyl-d3 deuterated form thereof
发明人：HOVEYDA HAMID; DUTHEUIL GUILLAUME
权利人:OGEDA SA
摘要:The present invention relates to a method of synthesis of compound (I), wherein R1 represents methyl or methyl-d3, thus corresponding to 3-methyl-1,2,4-thiadiazole-5-carbohydrazide or to the methyl-d3 deuterated form thereof. These compounds are useful as key intermediates in the synthesis of pharmaceutical compounds, especially fezolinetant and deuterated fezolinetant.

专利号:US-3956184-A
优先权日:1974-04-24
标题:Method of preparing silver catalyst for synthesis of formaldehyde by oxidizing methyl alcohol
发明人：KRUGLIKOV ANATOLY ABRAMOVICH; YAKOVENKO ZEMFIRA IVANOVNA; ROZNINA MARINA IVANOVNA; ROGACHEVA ANNA MALOFEEVNA; BELOUSOV GERMAN IVANOVICH
权利人:KRUGLIKOV ANATOLY ABRAMOVICH; YAKOVENKO ZEMFIRA IVANOVNA; ROZNINA MARINA IVANOVNA; ROGACHEVA ANNA MALOFEEVNA; BELOUSOV GERMAN IVANOVICH
摘要:The method of preparing a silver catalyst for synthesis of formaldehyde by oxidizing methyl alcohol which consists in that a carrier is impregnated with an aqueous or an aqueous-alcohol solution containing complex ions of silver having the general formula [Ag(X) n ] + or [Ag(Y) 2 ] - , where X is ammonia, ethylenediamine, triethylenetetramine or triaminotriethylamine, Y is a thiocyanate, cyanide, acetate, or hydroxyl ion, and n is 1 or 2. The impregnated carrier is processed, at a temperature of from 10° - 100°C, with a reducing agent taken in the quantity sufficient to reduce the silver completely from said ion. The thus-prepared catalyst is dried at a temperature of from 80° to 400°C. It is recommended that the catalyst be washed with water before drying. The thus-prepared catalyst has a highly developed active surface with a small content of silver (the specific surface of the catalyst is 0.7 - 7 square meters per gram, with the metal silver content of the catalyst being from 5 - 10 per cent by weight). The catalyst is highly active and has good selectivity in the process of formaldehyde synthesis from methyl alcohol. The yield of formaldehyde with the proposed catalyst is from 75 - 80 per cent, calculating with reference to the passed methyl alcohol, with the selectivity of the process being from 89 - 95 per cent.

专利号:US-11292775-B2
优先权日:2017-12-21
标 题 :Efficient process for the synthesis of 2-[2-(1-chlorocyclopropyl)-3-(2-chlorophenyl)-2-hydroxypropyl]-2,4-dihydro-3H-1,2,4-triazole-3-thione(prothioconazole) and its intermediates
发明人：KADAM SUBHASH RAJARAM; JANI NILESH; SHINDE RAVINDRA; SHAH KENAL V; SHAH BHAVESH V; GUJRAL AJIT SINGH; BYREGOWDA GANGANARASAIAH; SIVAIAH GANADI; PAWAR JIVAN DHANRAJ; PATI HARI NARAYAN
权利人:GSP Crop Science Pvt Ltd
摘要:The present invention relates to an improved and efficient process for the synthesis of 2-[2-(1-chlorocyclopropyl)-3-(2-chlorophenyl)-2-hydroxypropyl]-2,4-dihydro-3H-1,2,4-triazole-3-thione, compound of formula (I) (Prothioconazole). The present invention more particularly relates to an improved process for manufacturing of 2-(1-chloro-cycloprop-1-yl)-3-(2-chloro phenyl)-2-hydroxy propyl-1-hydrazine (compound of formula III) and 2-[2-(1-chlorocyclopropyl)-3-(2-chlorophenyl)-2-hydroxypropyl]-1,2,4-triazolidine-3-thione (compound of formula II) which are mainly used for synthesis of Prothioconazole which is knows as an active compound with microbicidal fungicidal properties.

专利号:US-12281398-B2
优先权日:2022-02-07
标题:Microfluidic process for the general electrochemical synthesis of geminal dipseudohalide or halide-pseudohalide compounds
发明人：SCHROER THORSTEN G; LECROY GREGORY E; AGUILA MIGUEL; RODRIGUEZ MAYRA P; DOWNARD TYLER J; MACLEOD BRIANNA L
权利人:US GOV AIR FORCE; US AIR FORCE
摘要:A process for the microfluidic electrochemical synthesis of geminal dipseudohalide or halide-pseudohalide compounds comprising the steps ofpumping a solution comprising a compound of Formula Iinto a microfluidic electrochemical reactor in the presence of a base, one of a halide or pseudohalide salt (MY), and a mediator;applying an electrical current through the microfluidic electrochemical reactor; andperforming oxidative addition to create a geminal dipseudohalide or halide-pseudohalide compound of the general Formula II

专利号:US-4581416-A
优先权日:1981-01-19
标题 :Process for the synthesis of tertiary phosphine oxides and sulfides, and new tertiary phosphine oxides and sulfides
发明人：BERGERET WILFRID; BOILEAU SYLVIE; GAUTIER JEAN-CLAUDE; RAYNAL SERGE
权利人:POUDRES & EXPLOSIFS STE NALE
摘要:The invention relates to processes for the synthesis of tertiary phosphine oxides and sulfides. The process according to the invention consists, in a first step, of reacting a secondary phosphine oxide or sulfide with an optionally activated alkali metal amide, and, in a second step, of reacting the mixture obtained in the first step with an organic halide containing at least one halogenophenyl radical or one halogenomethyl group. Tertiary phosphine oxides and sulfides are complexing agents of high stability.

专利号:US-10626091-B2
优先权日:2014-10-01
标 题 :Process for the preparation of enzalutamide
发明人：CHIVUKULA KAMESWAR RAO; KARUTURI VEERA VENKATESWARA RAO; BENDA SRINIVAS; ANKE RAMACHANDRA; GAJULA DHARMAPURI; MOTURU VENKATA RAMA KRISHNA MURTHY; INDUKURI VENKATA SUNIL KUMAR; GORANTLA SEETA RAMA ANJANEYULU; CHAVA SATYANARAYANA
权利人:LAURUS LABS LTD
摘要:The present invention relates to an improved process for the preparation of enzalutamide by conventional synthesis, which avoids utilization of microwave irradiation and noxious reagents. The present invention also relates to an improved process for preparation of 4-isothiocyanato-2-(trifluoromethyl) benzonitrile, which is an intermediate in the synthesis of Enzalutamide.