| 摘要 |
NEW MATERIAL:A compound shown by the formulaI(R<1> and R<2> are alkyl, phenyl, halogen-substituted phenyl, etc.; R<3> and R<4> are alkyl, phenyl, or R<3> and R<4> are linked to neighboring N to form alkyl-substituted or unsubstituted heterocyclic monocyclic group). EXAMPLE:N-(2-Isocyano-2-cyclohexylideneacetyl)piperidine. USE:A herbicide. Having improved withering action on various kinds of weeds, especially broadleaf weeds, further high safety to various kinds of crops. PROCESS:An alpha-formylaminoacrylic amide compound shown by the formulaII is reacted with a dehydrating agent such as phosphorus oxychloride in the presence of a deoxidizer (e.g., triethylamine, etc.) in a solvent such as benzene at -20- 50 deg.C, to give a compound shown by the formulaI. The compound shown by the formula II, a raw material, is a novel compound, and obtained by reacting a ketone compound shown by the formula III with an alpha-isocyanoacetic amide compound shown by the formula IV. |
