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    • 1. 发明授权
    • Preparation of N-hydroxypyrazoles
    • N-羟基吡唑的制备
    • US4945167A
    • 1990-07-31
    • US367047
    • 1989-06-16
    • Ulf BausWolfgang ReutherErwin Hahn
    • Ulf BausWolfgang ReutherErwin Hahn
    • C07D231/12C07D231/16C07D521/00
    • C07D231/12C07D231/16C07D233/56C07D249/08
    • N-hydroxypyrazoles of the general formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 may be identical or different and are each hydrogen or halogen, are prepared by a process in which a pyrazole of the general formula II ##STR2## where R.sup.1, R.sup.2 and R.sup.3 have the meanings stated for formula I, is reacted with an aliphatic or aromatic peroxocarboxylic acid, preferably in the presence of from 0 to 15 moles of an alkali metal hydroxide, alkaline earth metal hydroxide, alkali meteal carbonate or alkaline earth metal carbonate in such a way that the reaction temperature is from -5.degree. C. to 60.degree.C.The reaction can be carried out in water as a solvent or in a 2-phase system consisting of water and an inert organic solvent which is poorly miscible with water, in the presence or absence of a suitable phase transfer catalyst. The peroxocarboxylic acid can be prepared in the reaction mixture before the reaction from H.sub.2 O.sub.2 and an acyl halide or a carboxylic anhydride or can be used in the form of an alkali metal salt or alkaline earth metal salt.
    • 其中R 1,R 2和R 3可以相同或不同并且各自为氢或卤素的通式I(I)的N-羟基吡唑通过其中通式II的吡唑(IMAGE)( II)其中R 1,R 2和R 3具有式I所述的含义,与脂族或芳族过氧羧酸反应,优选在0至15摩尔碱金属氢氧化物,碱土金属氢氧化物,碱金属碳酸盐 或碱土金属碳酸盐,使得反应温度为-5℃至60℃。该反应可以在作为溶剂的水中或在由水和惰性有机物组成的2相体系中进行 在有或没有合适的相转移催化剂的情况下与水很难混溶的溶剂。 过氧化羧酸可以在与H 2 O 2和酰卤或羧酸酐反应之前在反应混合物中制备,或者可以以碱金属盐或碱土金属盐的形式使用。
    • 9. 发明授权
    • Bisazo compounds containing anthranilic acid and thiazole moieties
    • 含有邻氨基苯甲酸和噻唑部分的双偶氮化合物
    • US4694075A
    • 1987-09-15
    • US820018
    • 1986-01-21
    • Horst ColbergErwin Hahn
    • Horst ColbergErwin Hahn
    • C09B44/02C09B31/14C09B44/08D06P1/04D06P1/41
    • C09B44/02
    • The compounds of the formula ##STR1## where Y is hydrogen, chlorine, bromine or nitro, Z is hydrogen, chlorine, bromine, a sulfonic ester group or unsubstituted or substituted sulfamyl, X is --O-- or ##STR2## R is alkylene which may or may not be interrupted by oxygen or ##STR3## m is 0 or 1, p is 1 or 2, R.sup.1 and R.sup.2 independently of one another are each hydrogen, unsubstituted or substituted alkyl, alkenyl, cycloalkyl, aralkyl, or aryl, or R.sup.1 and R.sup.2 together with the nitrogen form a heterocyclic structure, R.sup.3 is hydrogen or unsubstituted or substituted alkyl, R.sup.6 and R.sup.7 independently of one another are each hydrogen, unsubstituted or substituted alkyl, alkoxy or acylamino, K is a radical of a coupling component, A.crclbar. is an anion, R.sup.4 is unsubtituted or substituted alkyl and R.sup.5 is hydrogen or C.sub.1 -C.sub.4 -alkyl, and the radical ##STR4## may furthermore be an unsubstituted or substituted piperazine radical, are useful for dyeing acid-modified fibers, leather and in particular paper.
    • 其中Y是氢,氯,溴或硝基,Z是氢,氯,溴,磺酸酯基或未取代或取代的亚磺酰基的式“IMAGE”的化合物,X是-O-或R是 氧可以或不会被氧中断,或者m为0或1,p为1或2,R 1和R 2彼此独立地为氢,未取代或取代的烷基,烯基,环烷基,芳烷基或芳基,或 R 1和R 2与氮一起形成杂环结构,R 3为氢或未取代或取代的烷基,R 6和R 7彼此独立地为氢,未取代或取代的烷基,烷氧基或酰氨基,K为偶联组分的基团, A( - )是阴离子,R4是未取代的或取代的烷基,R5是氢或C1-C4-烷基,基团还可以是未取代或取代的哌嗪基,可用于染色酸改性纤维, 皮革,特别是纸张。