CAS: 96-75-3; 2-Amino-5-Nitrobenzenesulfonic Acid

上下游产品

2-chloro-5-nitro-benzenesulfonic acid 4-nitro-aniline sulfuric acid iodine 2,4-Dinitrophenol 2,6-dibromo-4-nitroaniline 2,6-diiodo-4-nitroaniline 2-amino-3-iodo-5-nitro-benzenesulfonic acid

6-硝基苯并噻唑置于[rucl(P(C6H5)3)2(O(C6H4)Nch(C4H3N))],Bromamine B,Sodium Hydroxide体系中,用 水,乙腈 作为反应溶剂,化学反应 5.75H,以90%的收率获得产物2-氨基-5-硝基苯磺酸
参考文献:Development Of An Efficient Ruthenium Catalyzed Synthetic Process And Mechanism For The Facile Conversion Of Benzothiazoles To Orthanilic Acids
标题:Development Of An Efficient Ruthenium Catalyzed Synthetic Process And Mechanism For The Facile Conversion Of Benzothiazoles To Orthanilic Acids
摘要:Ruthenium-Schiff Base Complex Catalyzed Efficient Protocol Has Been Developed For The Synthesis Of Orthanilic Acids From Benzothiazoles In Good To Excellent Yields Using N-Haloamines. Hexa-Coordinated Ruthenium Complex With Schiff Base And Triphenylphosphine Ligands Has Been Prepared And Its Catalytic Function Was Invented For The Synthesis Of Orthanilic Acids. The Synthetic Process Utilizes Our Efficient Method For The Selective And Preferential Oxidation Of Thiazole Ring Of Benzothiazoles Using N-Haloamines Without Effecting Phenyl Ring. The Detailed Catalytic,Mechanistic And Kinetic Investigations Have Been Made For The Synthetic Reactions. Solvent Isotope Studies Have Been Made In H2O-D2O And The Reactions Were Carried Out At Different Temperatures. Under The Identical Set Of Conditions,The Kinetics Of Catalyzed Reactions Has Been Compared With Uncatalyzed Reactions And Found That The Catalyzed Reactions Are 9-11 Folds Faster. The Catalytic Constants (K-C) Have Been Calculated For Each N-Haloamine At Different Temperatures And The Values Of Activation Parameters With Respect To The Catalyst Have Been Evaluated. Spectroscopic Evidence For The Formation Of 1:1 Complex Between N-Haloamine And Ruthenium Has Been Obtained. The Observed Results Have Been Explained By A Plausible Mechanism And The Related Rate Law Has Been Deduced. (C) 2010 Elsevier B.V. All Rights Reserved.
DOI:10.1016/j.Molcata.2010.06.006

专利信息

专利号:US-4118384-A
优先权日:1976-02-21
标题 :Process for preparation of azo dyestuffs by coupling in presence of aromatic sulphonic acid-formaldehyde reaction product
发明人：MOLLS HANS-HEINZ; SCHIWY WILLY; HORNLE REINHOLD; NEBELING REINHARD
权利人:BAYER AG
摘要:Dyestuff dispersions and dyestuff solutions free from salt or at least having a low salt content are obtained in that the diazotization is carried out with addition of free dispersing agent acid to which, after the synthesis, either no basic agents are added or basic agents are added only up to a pH value of 3. The disclosed process gives dyestuff compositions of low salt content and results in readily dispersible dyestuffs when water insoluble dyestuffs are prepared and stable solutions when water soluble dyestuffs are prepared. The process is widely applicable and chemical constitution of the dyestuffs is conventional.

专利号:US-4035350-A
优先权日:1975-01-30
标 题:Process for the preparation of water-soluble azo dyestuffs by reacting an aromatic amine and a coupling component with alkali metal nitrite or alkyl nitrite in the absence of acid
发明人：LANDLER JOSEF; WORFEL ERHARD
权利人:HOECHST AG
摘要:A new and very advantageous Process had been found for the preparation of azo dyestuffs by diazotation and coupling in which the synthesis is carried out without the hitherto usual addition of an acid, with the proviso that at least one of the diazo and coupling components contains at least one acid group. Besides the saving of reaction material and subsequently of alkali for neutralization of the reaction medium and isolation of the dyestuff, highly concentrated solutions of the dyestuff and salt-free or practically salt-free dyestuffs can be obtained, and waste-water is no longer charged with big amounts of salts.

专利号:US-4169832-A
优先权日:1975-09-05
标题 :Disazo and trisazo intermediates for polyazo dyes containing a stilbenyl or 2,2'-disulfostilbenyl radical
发明人：VOGEL CLAUDE; WICKI HEINZ
权利人:SANDOZ AG
摘要:Disclosed are compounds of the formula, ##STR1## wherein THE X's are the same and are hydrogen or --SO 3 M, n Y is hydrogen, C 1-4 alkyl, C 1-4 alkoxy, hydroxy, halogen, --COOM or --SO 3 M, n K 1 and K 2 are the same or different and are both radicals of a coupling component, n Either A 1 is --SO 3 M and one of B 1 and C 1 is --SO 3 M, the other being hydrogen, n Or A 1 and C 1 are both hydrogen and B 1 is --SO 3 M, and n M is hydrogen or a non-chromophoric cation, their production and use in dyeing anionic dyeable substrates, for example, natural and regenerated cellulose, natural and synthetic polyamides, polyurethanes, polypropylene modified to contain basic groups, anodized aluminum, paper and, particularly, leather. The dyes are well-soluble in water, possess good resistance to acid, have relatively high substantivity especially to paper and leather and give good penetration dyeings with leather. n Compounds of the formula ##STR2## wherein Q is --NH 2 , --NO 2 , acylamino or K 3 --Nâ•?N--, n wherein K 3 is a coupling component radical free of diazotizable amino groups, n Q is --NH 2 , --NO 2 , acylamino or --Nâ•?N--K 4 , n wherein K 4 is a coupling component radical free of diazotizable amino groups, n with the proviso that when Q is K 3 --Nâ•?N--, Q' is amino, nitro or acylamino, and n A 1 , b 1 , c 1 , each X and Y are as defined above, are useful as intermediates in the synthesis of the polyazo cmpounds.