CAS: 97-52-9; 2-Methoxy-4-Nitroaniline

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3-硝基苯甲醚置于4-氨基-1,2,4-三氮唑,Potassium Tert-Butylate体系中,用 二甲基亚砜 作为反应溶剂,化学反应 4.0H,以36%的收率获得产物2-甲氧基-4-硝基苯胺
参考文献:Direct Amination Of Nitrobenzenes By Vicarious Nucleophilic Substitution
标题:Direct Amination Of Nitrobenzenes By Vicarious Nucleophilic Substitution
摘要:
DOI:10.1021/jo00375A062

专利信息

专利号:US-4828622-A
优先权日:1984-11-06
标题:Process for preparing highly concentrated aqueous press cakes of solids
发明人：WEIDE JOACHIM; DIETZ ERWIN; DEUBEL REINHOLD
权利人:HOECHST AG
摘要:According to the invention, addition of one or more surfactants having a cloud point in aqueous solution to an aqueous suspension of a solid gives after the isolation of the solid at a temperature above the cloud point aqueous press cakes containing a large amount of this solid. The direct processing of press cakes as obtained for example after the synthesis and isolation of dyes or pigments to give practical aqueous pastes or dispersions requires a minimum solids content in the press cakes. The minimum content is frequently not obtained when conventional methods of isolation are used, so that it is necessary to proceed via the indirect route of drying to obtain the powders and redispersing the powders. By using the process according to the invention it is possible to cut out the costly indirect route or, if desired, to reduce the expense of drying to obtain powders by an appreciable margin.

专利号:US-4257942-A
优先权日:1977-10-06
标题:New water-insoluble azo dyes
发明人：DEFEO FRANCESCO; CIPOLLI ROBERTO
权利人:ACNA
摘要:The present invention relates to the synthesis of new dyes having the following general formula: wherein: D is the residue of a diazotizable component of the carbocyclic or heterocyclic series X is an ethylene group, optionally substituted by halogen-methyl, alkyl C1-C4, aryl, aralkyl or CH2OCO(HN)nR (wherein R and n have the meanings hereinafter defined); R is alkyl C1-C8 optionally substituted by halogen, CN,COOH; aryl optionally substituted by one or more atoms of halogen, alkyl C1-C4, alkoxyl C1-C4; alkoxyl C1-C4; alkoxyl C1-C8; Aryloxy; aralkoxy; cycloalkoxy; aralkyl; naphthyl optionally substituted by halogen; alkenyl C2-C8, optionally substituted by halogen, CN, COOH; R1 and R2, either like or unlike each other, may be alkyl C1-C4 optionally substituted by halogen or CN groups; aralkyl; R3 is H; halogen, alkyl C1-C4; alkoxyl C1-C4, optionally substituted. n is 0 or 1.

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-7745490-B2
优先权日:2004-05-12
标题 :Substituted N-aryl benzamides and related compounds for treatment of amyloid diseases and synucleinopathies
发明人：SNOW ALAN D; NGUYEN BETH P; LAKE THOMAS P; CASTILLO GERARDO M; WEIGELE MANFRED
权利人:PROTEOTECH INC
摘要:Substituted n-aryl benzamides, related compounds and their pharmaceutically acceptable derivatives, their synthesis, pharmaceutical compositions containing them, and their use in the treatment of amyloid diseases, including Aβ amyloidosis, such as observed in Alzheimer's disease, IAPP amyloidosis, such as observed in type 2 diabetes, and synucleinopathies, such as observed in Parkinson's disease, and the manufacture of medicaments for such treatment are provided.

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.