18281-78-2Relevant articles and documents
O-ethyl-S-n-propyl-(3-ethyl-2-cyano-imine-1-imidazole) process for synthesis of phosphate esters
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Paragraph 0018; 0024; 0025; 0026, (2016/11/28)
The invention relates to a synthetic process of O-ethyl-S-n-proply-(3-ethyl-2-cyano imine-1-imidazole) phosphate. The process comprises the following steps of: 1) synthesis of O-ethyl-S-n-proply-S-propyl phosphoryl chloride; 2) synthesis of 1-ethyl-2-(N-cyano imine) imidazole; and 3) synthesis of O-ethyl-S-n-proply-(3-ethyl-2-cyano imine-1-imidazole) phosphate. The process provided by the invention has the beneficial effects that the reaction step and time are shortened, the yield is improved from 50% to over 70%, and the total yield is improved; according to the process, potassium carbonate replaces flammable and combustible sodium hydride, so that the reaction condition is more mild and the production process is safer; based on dipropyl dithio and phosphorus trichloride as initial raw materials, S-n-proply phosphoryl dichloride is synthesized and reacted with ethanol to obtain O-ethyl-S-n-propyl-phosphoryl chloride; the line is short and the raw material is easy to get with less wastewater, and the method is suitable for industrialization.
Process for preparing phosphorodichloridothiolate
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, (2008/06/13)
S-substituted phosphorodichloridothiolates such as S-alkyl, cycloalkyl, aralkyl, and arylphosphorodichloridothiolates are prepared by reacting a sulfuryl chloride and a mercaptan or disulfide with phosphorus trichloride and a carboxylic acid anhydride.
Process for the preparation of phosphorodichloridothiolates
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, (2008/06/13)
Certain S-alkyl, -cycloalkyl, -aralkyl, and -aryl phosphorodichloridothiolates are prepared by reacting a sulfenyl chloride, which can be prepared in situ, with phosphorus trichloride and a carboxylic acid or water.