Process for production of purified o-(2,6-dichloro-4-methyl-phenyl) o,o-dimethyl phosphorothioate
AssigneeSumitomo Chemical Company, Limited
InventorsEiji Yamauchi, Ryuhei Wakita
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Abstract
A process for producing a purified O—(2,6-dichloro-4-methylphenyl)—O,O-dimethyl phosphorothioate, the process comprising: the first step of bringing a crude O—(2,6-dichloro-4-methylphenyl)—O,O-dimethyl phosphorothioate into contact with an acid; and the second step of recovering the purified O—(2,6-dichloro-4-methylphenyl)—O,O-dimethyl phosphorothioate from the mixture obtained in the first step.
Claims6
A process for producing a purified O—(2,6-dichloro-4-methylphenyl)—O,O-dimethyl phosphorothioate, the process comprising:
- the first step of bringing a crude O—(2,6-dichloro-4-methylphenyl)—O,O-dimethyl phosphorothioate into contact with an acid;
- and
- the second step of recovering the purified O—(2,6-dichloro-4-methylphenyl)—O,O-dimethyl phosphorothioate from the mixture obtained in the first step.
A process for producing O—(2,6-dichloro-4-methylphenyl)—O,O-dimethyl phosphorothioate, the process comprising:
- Step A of bringing 2,6-dichloro-4-methylphenol into contact with O,O-dimethyl chlorophosphorothioate in a solvent in the presence of copper chloride;
- Step B of bringing the reaction mixture obtained in said step A into contact with an acid;
- and
- Step C of recovering O—(2,6-dichloro-4-methylphenyl)—O,O-dimethyl phosphorothioate from the mixture obtained in said step B.
Dependencies are inferred from the claim text.