摘要:
The invention concerns a method for method for preparing 1,3,5-triaminobenzene, characterized in that it comprises a step which consists in amination of a compound of formula (I), wherein: A represents a halogen atom or a NH2 group; X1 and X2, identical or different, represent each a halogen atom, the amination step being carried out in the presence of ammonia and a catalyst selected from the group consisting of copper salts, cupric and cuprous oxides or mixtures thereof at a temperature ranging between 150° C. and 250° C. and at a pressure higher that 35 bars
摘要翻译:本发明涉及一种制备1,3,5-三氨基苯的方法,其特征在于它包括一个步骤,该步骤由式(I)化合物胺化而成,其中:A代表卤原子或NH 2 SUB>组; X 1和X 2相同或不同,表示各自的卤素原子,胺化步骤在氨存在下进行,并且催化剂选自: 铜盐,铜和氧化亚铜或其混合物,温度范围为150℃至250℃,压力高于35巴
摘要:
A process for producing polyhalogenated phenol by mixing a polyhalogenated aniline with an aqueous sulfuric acid solution to obtain a suspension of fine particles of polyhalogenated aniline sulfate having the particle size of 50 .mu. or less, diazotizing the polyhalogenated aniline sulfate to obtain polyhalogenate benzenediazonium sulfate, hydrolyzing the resulting benzenediazonium sulfate by heating it as such, recycling to the diazotization step the aqueous sulfuric acid solution from which the desired polyhalogenated phenol has been separated.
摘要:
This invention relates to a novel integrated route to selected phenols by diazotization of selected aminobenzene compounds in a mixed phosphoric-sulfuric acid system and subsequent decomposition of the diazonium salt.
摘要:
Novel 4-phenoxy-phenoxy-alkane-carboxylic acid derivatives of the formula I ##STR1## in which R.sub.1 stands for hydrogen, methylithio, cyclopentyl, cyclohexyl, phenyl, methylcycylohexyl, ethylcyclohexyl, or R.sub.1 and R.sub.3 together stand for a --CH.dbd.CH--CH.dbd.CH-- bridge or--unless at least one of the substituents R.sub.2 to R.sub.8 stands for hydrogen, or if R.sub.9 stands for a radical having at least 2 carbon atoms--for chlorine,R.sub.2 and R.sub.3, independent of one another, each stands for hydrogen, chlorine or alkyl of 1 to 4 carbon atoms,R.sub.4 stands for hydrogen, chlorine, alkyl of 1 to 4 carbon atoms, cyclopentyl, cyclohexyl, methylcyclohexyl or R.sub.3 and R.sub.4 together stand for a --CH.dbd.CH--CH.dbd.CH-- bridge,R.sub.5, R.sub.6 and R.sub.7, independent of one another, each stands for hydrogen or alkyl of 1 to 4 carbon atoms,R.sub.8 stands for hydrogen, alkyl of 1 to 4 carbon atoms or allyl,R.sub.9 stands for alkyl of 1 to 10 carbon atoms or phenyl andX stands for hydrogen, the cation of a physiologically acceptable inorganic or organic base of a hydrocarbon radical of 1 to 10 carbon atoms, having a strong action on the lipide and cholesterine metabolism and a process for this manufacture.
摘要:
Phloroglucinol may be produced by converting s-triacetyl benzene to benzene-1,3,5-tris-acetoxime which is a novel compound. Said acetoxime is subjected to a Beckmann rearrangement and the resulting mixture subsequently hydrolyzed to produce phloroglucinol.
摘要:
Aminobenzenes (e.g., aniline) are converted to the corresponding hydroxybenzene by reaction with water in the presence of a hydrogen transfer catalyst (e.g., palladium) and a reaction propagating agent selected from cyclohexanones and cyclohexylimines. The cyclohexylimine may be formed by initially adding a reducing agent (e.g., hydrogen) to the aminobenzene.
摘要:
Resorcinol is produced by the hydrolysis of metaphenylenediamine in an aqueous excess of ammonium bisulfate. The reactants are contacted at an elevated temperature for a period of time sufficient to hydrolyze the meta-phenylenediamine to resorcinol. The resorcinol so produced is separated from the reaction mixture. The ammonium sulfate is regenerated to ammonium bisulfate by removing the water and thermally decomposing the byproduct ammonium sulfate at an elevated temperature.