| 摘要 |
<p>Benzodioxolan derivatives of the formula <IMAGE> I wherein R1 and R2 are the same or different and are hydrogen, an aliphatic hydrocarbon residue, a halogenated aliphatic hydrocarbon residue, an aromatic hydrocarbon residue, a substituted aromatic hydrocarbon residue, A HETEROCYCLIC RESIDUE OR A SUBSTITUTED HETEROCYCLIC RESIDUE, OR WHEREIN R1 and R2 together with the adjoining carbon atom are a cycloaliphatic hydrocarbon residue which may additionally be substituted by nitrogen or oxygen or both, and wherein R3 is hydrogen or an aliphatic hydrocarbon residue, AND WHEREIN R4 is a saturated or unsaturated aliphatic hydrocarbon residue or is alkoxy and wherein R5 is hydrogen or is a saturated or unsaturated aliphatic hydrocarbon residue. The compounds have a high herbicidal activity against weeds and superior selective herbicidal properties for agricultural and horticultural plantations. The invention also embraces processes for making the compounds and compositions containing the same.</p> |
