PROCESS FOR PREPARATION OF O, O-DIMEHYL PHOSPHORAMIDOTHIOATE AND N-(METHOXY-METHYLSULFANYLPHOSPHORYL) ACETAMIDE
申请人:Arysta LifeScience Inc.
公开号:US20200024293A1
公开(公告)日:2020-01-23
Preparation of O,O-dimethyl phosphoramidothioate and O,O-dimethyl phosphoroamidothioate. A process of making O,O-dimethyl phosphoroamidothioate is described including reacting sulfur with PCl
3
to form PSCl
3
, reacting the PSCl
3
formed with methanol to form O-methyl phosphorodichloridothioate, and reacting the O-methyl phosphorodichloridothioate formed with methyl lye to form O,O-dimethyl phosphorochloridothioate in solution in CH
2
Cl
2
, and reacting the O,O-dimethyl phosphorochloridothioate formed with sodium hydroxide and ammonium hydroxide to form O,O-dimethyl phosphoroamidothioate in solution in CH
2
Cl
2
. Reacting the O,O-dimethyl phosphoroamidothioate formed with catalytic dimethyl sulfate to form methamidophos, and reacting the methamidophos formed with acetic anhydride to form N-(methoxy-methylsulfanylphosphoryl) acetamide is also described. Throughout the process, the O,O-dimethyl phosphorochloridothioate and the O,O-dimethyl phosphoroamidothioate formed are maintained in solution in CH
2
Cl
2
at all times.
制备O,O-二甲基磷氨硫代酸酯和O,O-二甲基磷氨基硫代酸酯。本发明公开了一种制备O,O-二甲基磷氨基硫代酸酯的方法,包括将硫与PCl3反应以形成PSCl3,将所形成的PSCl3与甲醇反应以形成O-甲基磷二氯硫代酸酯,将所形成的O-甲基磷二氯硫代酸酯与甲基氢氧化钠在CH2Cl2溶液中反应以形成O,O-二甲基磷氯硫代酸酯,再将所形成的O,O-二甲基磷氯硫代酸酯与氢氧化钠和氨水在CH2Cl2溶液中反应以形成O,O-二甲基磷氨基硫代酸酯。本发明还公开了将所形成的O,O-二甲基磷氨基硫代酸酯与催化二甲基硫酸酯反应以形成甲胺磷,并将所形成的甲胺磷与乙酸酐反应以形成N-(甲氧基甲基硫基磷酰)乙酰胺的方法。在整个过程中,所形成的O,O-二甲基磷氯硫代酸酯和O,O-二甲基磷氨基硫代酸酯始终保持在CH2Cl2溶液中。