CAS: 1310-61-8; Potassium Hydrosulfide

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hydrogen sulfide potassium

专利信息

专利号:US-4014895-A
优先权日:1972-06-22
标 题:Method for synthesis of optically active thiolactones
发明人：AOKI YASUHIKO; SUZUKI HIROYUKI; AKIYAMA HISAO; OKANO SHIGERU
权利人:SUMITOMO CHEMICAL CO
摘要:A new method for the production of intermediates in the synthesis of an optically active biotin, which comprises reacting a dicarboxylic acid of the formula: ##SPC1## n Or its reactive derivative with an optically active primary amine, reducing the resulting trione with a metal hydride, hydrolyzing the resultant amide-alcohol and treating the thus produced lactone with a thiolactonating agent to give a thiolactone of the formula: ##SPC2## n , the said trione and amide-alcohol being respectively novel and representable by the formulae: ##SPC3##

专利号:US-4579946-A
优先权日:1985-01-10
标 题:Process for synthesis of 2-vinyl-4,6-diamino-S-triazine
发明人：SAWA NATSUO; MASUDA TAKESHI
权利人:SHIKOKU CHEM
摘要:Disclosed is a process for the synthesis of 2-vinyl-4,6-diamino-S-triazine having the following structural formula: ##STR1## which comprises heating an imidazolyl-S-triazine compound represented by the following general formula: ##STR2## wherein R 1 stands for a hydrogen atom, a methyl group or an ethyl group, and R 2 stands for a hydrogen atom or a methyl group, or an isocyanuric acid-addition product thereof under reduced pressure in the presence of a polymerization inhibitor. n According to this process, 2-vinyl-4,6-diamino-S-triazine can be manufactured at a low cost on an industrial scale.

专利号:US-11905296-B2
优先权日:2020-01-27
标题:Process for the synthesis of buprenorphine
发明人：ZINSER HARTMUT; DANIELYAN TAMAR; GRIGORYAN MERI; GHARIBYAN MARIAM; MOVSISYAN MIKAYEL; NERKARARYAN KRISTINE
权利人:AZAD PHARMA AG
摘要:The present invention relates to a novel route of synthesis for the opioid receptor antagonist Buprenorphine or a pharmaceutically acceptable salt thereof, starting from thebaine, wherein the route comprises the reaction of thebaine with a dienophile; forming an alkylated reaction product by reaction with a Grignard-reagent; formation of an cyanamide; deprotection of the cyanamide- and the phenolic-oxygen-moiety, wherein the cleavage of one or both groups is performed in the presence of an alkali or alkaline earth sulfide; followed by derivatization with a cyclopropyl-halogen and hydrogenation to yield Buprenorphine.

专利号:US-7208613-B2
优先权日:2002-06-20
标 题:Synthesis of s-fluoromethyl 6α,9α-difluoro-11β-hydroxy-16α-methyl-17α-propionyloxy-3-oxoandrosta-1,4-diene-17β-carbothioate
发明人：JADAV KANAKSINH JESINGBHAI; KAMBHAMPATI SUDHAKAR; CHITTURI TRINADHA RAO; THENNATI RAJAMANNAR
权利人:SUN PHARMACEUTICAL IND LTD
摘要:The present invention provides a convenient process for the preparation of S-fluoromethyl 6α,9α-difluoro-11β-hydroxy-16α-methyl-17α-propionyloxy-3-oxoandrosta-1,4-diene-17β-carbothioate, a compound of formula 1, comprisingn (a) treating 17β-[(N,N-dimethylcarbamoyl)thio]carbonyl-6α,9α-difluoro-11β-hydroxy-16α-methyl-17α-propionyloxy-3-oxoandrosta-1,4-diene, a compound of formula 3 with alkali metal carbonate-alcohol system to obtain 6α,9α-difluoro-11β-hydroxy-16α-methyl-17α-propionyloxy-3-oxoandrosta-1,4-diene-17β-carbothioic acid, a compound of formula 4; (b) reacting the compound of formula 4 with bromofluoromethane to yield the compound of formula 1.

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-7902383-B2
优先权日:2006-05-29
标 题 :Production method of heterocyclic mercapto compound
发明人：YOROZUYA SHINICHI; AOKI HIDEMASA
权利人:SHOWA DENKO KK
摘要:A method of the invention industrially produces heterocyclic mercapto compounds useful as raw materials or intermediates in the synthesis of medicaments or pesticides, or as permanent wave agent, with a high yield and high productivity using easily available starting materials. A heterocyclic mercapto compound represented by Formula (1) (wherein X represents any structure of —O—, —S—, —NH—, and —NR 1 —; R 1 represents any of an alkyl group, alkoxy group and alkoxyalkyl group each having 1 to 6 carbon atoms; Y represents an oxygen atom, a sulfur atom or —NR 2 —; R 2 represents a hydrogen atom or alkyl group having 1 to 6 carbon atoms; and Z 1 represents a divalent organic residue having at least one mercapto group) is produced by reacting a metal sulfide or a metal hydrosulfide with a compound represented by Formula (2) (wherein X and Y are as defined in Formula (1); and Z 2 represents a divalent organic residue having at least one halogen group) in the presence of a solvent at a pH of 7.0 to 11.0.