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    • 8. 发明授权
    • Preparing unsymmetrical dithiophosphonic acid diesters
    • 制备不对称二硫代磷酸二酯
    • US3904711A
    • 1975-09-09
    • US17131171
    • 1971-08-12
    • EXXON RESEARCH ENGINEERING CO
    • OSWALD ALEXIS ASCHMIT GEORGE N
    • A01N57/18C07F9/32C07F9/40A01N9/36C10M1/48
    • C07F9/327A01N57/18C07F9/4075
    • Dithiophosphonic and dithiophosphinic acid esters can be prepared by free radical addition of the corresponding dithiophosphonic and dithiophosphinic acids to unsaturated compounds, such as olefinic and acetylene compounds, e.g. vinyl chloride, butadiene, allene, methylacetylene, etc. The unsaturated products of this novel process can be further reacted with a sulfhydryl containing compound such as methanethiol, O,O''-diethyl dithiophosphoric acid to provide SH addition thereto. Furthermore, both the dithiophosphonate adducts of the free radical addition process and also the dithiophosphonate adducts of the sulfhydryl containing compound addition step can be isomerized to form unsymmetrical dithiophosphonic acid S,S''diesters. In addition thereto the unsaturated unsymmetrical dithiophosphonic acid S,S''-diesters can also be further reacted with a sulfhydryl containing compound to provide SH addition thereto. The novel thiophosphonic and thiophosphinic compounds produced by the above described processes are useful as pesticides, particularly as insecticides, nematocides and lubricating oil additive such as antioxidants, etc.
    • 二硫代膦酸和二硫代次膦酸酯可以通过相应的二硫代膦酸和二硫代次膦酸对不饱和化合物例如烯属和乙炔化合物例如, 氯乙烯,丁二烯,丙烯,甲基乙炔等