S,s-di-(tertiary alkyl) thiophosphonate insecticides

C - Chemistry – Metallurgy – 07 – F

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260/625.3, 167/1

C07F 9/40 (2006.01) A01N 57/20 (2006.01)

Patent

CA 1303625

PR-7917A/8185 S,S-DI-(TERTIARY ALKYL) THIOPHOSPHONATE INSECTICIDES Abstract of the Invention Compounds having the formula Image in which R is methyl or ethyl, and R1 and R2 are the same or different tertiary alkyl groups each having from 4 to 6 carbon atoms, are insecticides and nematicides, especially for control of soil insects and nematodes. Symmetrical compounds (R1 = R2) may be prepared by reaction of an alkali metal mercaptide with an thiophosphonic dihalide. The alkali metal mercaptide may be prepared by reaction of a tertiary alkyl mercaptan with an alkali metal or alkali metal hydride.

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