2,6-Dichlorphenylessigsure Chemische Eigenschaften,Einsatz,Produktion Methoden
R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Chemische Eigenschaften
white crystalline powder
Verwenden
2,6-Dichlorophenylacetic acid is an inhibitor of isopenicillin N synthase (IPNS) and acyl-CoA: 6-APA acyltransferase. 2,6-Dichlorophenylacetic acid is also part of a group of phenylacetate derivatives that have cytostatic activity against tumour cells.
synthetische
The preparation of the 2, 6-dichlorophenylacetic acid:
the method comprises the following steps: 2, 6-dichlorotoluene is used as a raw material, and is catalyzed by a complex catalyst formed by transition metal and a ligand (wherein, a transition metal catalyst precursor is preferably palladium chloride, an oxidant is preferably TBP (tert-butyl peroxy ether), and a ligand is preferably Xantphos (4, 5-bis (diphenylphosphino) -9, 9-dimethyl xanthene)) in the presence of an alcohol and a catalyst and an oxidant to obtain 2, 6-dichlorophenylacetic acid, and the ethyl 2, 6-dichlorophenylacetate is prepared by hydrolysis and acidification, wherein the total yield is 68.4%. See patent document US2013303798, the reaction procedure is described as synthetic route 1.
In the above synthetic route 1, the preparation process of the intermediate ethyl 2, 6-dichlorophenylacetate requires the use of carbon monoxide for high-temperature and high-pressure reaction, and has poor operation safety, high equipment requirement, high cost, and is not favorable for cost reduction and green production of 2, 6-dichlorophenylacetic acid.
läuterung methode
Crystallise the acid from aqueous EtOH. [Beilstein 9 III 2272.]
2,6-Dichlorphenylessigsure Upstream-Materialien And Downstream Produkte
Upstream-Materialien
(2,6-Dichlorphenyl)acetonitril
2,2,6,6-Tetrachlorcyclohexan-1-on
3,5-Dichloro-4-methylbenzoic acid
2,4-DICHLORO-3-METHYLBENZOIC ACID
Benzeneacetic acid, 2,6-dichloro-, ethyl ester
2,6-Dichlorbenzylchlorid
Diethylmalonat
2,6-Dichloranilin
carbon monoxide
2,6-Dichlortoluol
Kohlenstoffdioxid
Downstream Produkte
