- A phenoxy quinoline and its synthetic method (by machine translation)
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The invention discloses a phenoxy quinoline and its synthetic method, the phenoxy quinoline comprises the following raw materials: water, ethyl acrylate, zinc chloride, glacial acetic acid, 3, 5 - dichloroaniline, ethanol, sodium hydroxide, toluene, poly phosphoric acid, n-octane, Pd/C catalyst, dichloroethane, phosphorus oxychloride, para-phenol and N, N - dimethyl formamide. This invention resulting of phenoxy quinoline content of greater than 98.0%, yield is 50% or more, the production cost is low, its synthetic combinations not needed in the process by the hydrolysis, such as high-temperature decarboxylation process, less operation step, mild reaction conditions, low equipment requirements, production of good product quality, is suitable for large-scale production enterprises. (by machine translation)
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Paragraph 0061-0062; 0073-0074; 0077-0078; 0084; 0085-0086
(2018/11/04)
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- Synthesis method of R-(+)-2-(4-hydroxyphenoxy) propionic acid
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The invention discloses a synthesis method of R-(+)-2-(4-hydroxyphenoxy) propionic acid. The method comprises the following steps: (1), adding hydroquinone into a sodium hydroxide solution containingan organic solvent in batches, and performing reaction under in N2 atmosphere, so as to obtain p-hydroxy sodium phenate turbid liquid; (2), dissolving S-(-)-2-chloropropionic acid in an organic solvent, and slowly adding Na2CO3 solid in an ice-water bath condition to perform reaction, so as to obtain an S-(-)-2-sodium chloropropionic acid solution; (3), slowly dropwise adding the solution in the step (2) into the turbid liquid in the step (1), and performing reduced pressure distillation, dissolution and acidification, extraction and reduced pressure distillation on obtained reaction liquid, so as to obtain white solid, namely the R-(+)-2-(4-hydroxyphenoxy) propionic acid. The synthesis method has the advantages of simple synthesis route, mild reaction condition, high product yield, high product optical purity ee value, high recovery rate of hydroquinone, less produced three wastes and low energy consumption.
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Paragraph 0013; 0029-0050
(2018/08/03)
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- PROCESS FOR THE RECOVERY OF PHENOL AND BIPHENOLS
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A process is described for the recovery of phenol and biphenols from their homogeneous mixtures containing benzene, sulfolane and water, which is based on the use of an alkaline solution and benzene for the separation of biphenols from sulfolane, after removing the benzene, H2O and phenol contained in the reaction effluent. The process allows the recovery of phenol and biphenol by-products dissolved in sulfolane, directly obtaining the purified solvent containing the benzene necessary for the feeding to the reactor for the direct oxidation of benzene, as well as the biphenols dissolved in water and pure phenol.
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- Process for making pyridyloxyphenol compounds
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Process for making pyridyloxyphenol by reacting under essentially anhydrous conditions in the absence of oxygen and in a polar aprotic solvent, a 2-halopyridine with hydroquinone which has been from 75 to 100 percent neutralized to the sodium or potassium
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- O-alkoxy- and alkylthiophenyl carbamates
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This invention discloses new chemical compounds of the formula STR1 wherein R1 is selected from the group consisting of hydrogen, alkyl and alkenyl; R2 is selected from the group consisting of alkyl, alkenyl, cycloalkyl and STR2 WHER
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