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PROPARGYL GROUP-CONTAINING METHANPHOSPHONIC ACID ESTERS AND THEIR USE IN SYNERGISTIC ACTIVE SUBSTANCE COMBINATIONS FOR PEST CONTROL
PROPARGYL GROUP-CONTAINING METHANPHOSPHONIC ACID ESTERS AND THEIR USE IN SYNERGISTIC ACTIVE SUBSTANCE COMBINATIONS FOR PEST CONTROL
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机译:含丙基的甲基膦酸酯及其在增效活性物质结合物中的应用
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摘要
1. Process for the preparation of propargyl methanephosphonates of the general formula (I) see diagramm : EP0025179,P5,F2 in which R denotes an alkyl, alkenyl or alkinyl radical having a maximum of 4 carbon atoms or an aryl radical, and X and Y denote oxygen or sulphur, characterized in that the relevant ester of methanephosphonyl monochloride or methanephosphonyl dichloride is reacted with at least the equivalent amount of propargyl alcohol in an aqueous two-phase system in the presence of an inorganic base, preferably with sodium hydroxide solution, as the acid-binding agent, in at least the equivalent amount.
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