发明名称 |
Phosphonic and thiophosphonic acid esters of 2-hydroxy |
摘要 |
<p>Phosphonic and thiphosphonic acid esters of 2-hydroxy 3,5,6-trichloropyridine, R1 = alkyl-R2 = alkyl-, phenyl-X = O or S Insecticides, acaricides. Potassium carbonate is added to a suspension of 2-hydroxy 3,5,6-trichloropyridine in acetonitrile and the mixture warmed to 60 deg. C for 1/2 hour. When the temperature has cooled to 50 deg. C methylthiono-phosphonic O-ethyl chloride is added dropwise. The mixture is heated for 4 hrs. at 70 deg. C and the stirring is continued for another 3 hrs. After filtration of the separated sodium chloride the filtrate is extracted with benzene. The benzene solution is washed with water, dried and the solvent distilled off. Recrystallisation of the residue from ethanol yields O-ethyl O-(3,5,6-trichloropyridyl-2) methylthiono-phosphonate.</p> |
申请公布号 |
CH516600(A) |
申请公布日期 |
1971.12.15 |
申请号 |
CH19680001654 |
申请日期 |
1968.02.05 |
申请人 |
FARBENFABRIKEN BAYER AKTIENGESELLSCHAFT |
发明人 |
FEST,CHRISTA,DR.;HAMMANN,INGEBORG,DR.;STENDEL,WILHELM,DR.;FLUCKE,WINFRIED,DR. |
分类号 |
A01N57/24;A61K31/675;C07F9/58;(IPC1-7):C07F9/40;A01N9/36 |
主分类号 |
A01N57/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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