| 摘要 |
New substituted N-cyclohexylthiolcarbamates of the formula , where R1 denotes alkyl, alkenyl or alkynyl of 1 to 4 carbon atoms, R2 denotes an alkyl radical of 1 to 4 carbon atoms or benzyl optionally substituted by halogen, X denotes methyl and/or ethyl and/or propyl and/or isopropyl, and m denotes one of the integers 1 and 2, are prepared by reacting a thiol chloroformate with a substituted N-cyclohexylamine of the formula , wherein R1, X and m have the aforesaid meanings. the thiolcarbamates of the invention have, compared with the prior art compounds, better compatibility with crop plants, especially Beta vulgaris, and a better herbicidal action when used preemergence on Panicum, Poa and Digitaria species and when used postemergence on Echinochloa crus-galli, Lolium species, Avena fatua and Alipecurus myosuroides. The new compounds also have a lower vapor pressure. |
