| 摘要 |
<p>2-Phenyl-5,6-dihydro-4-pyrone derivatives of the general formula: (wherein R1 and R2, which taken singly have the same or different significances, each represent a hydrogen atom or an alkyl radical containing from 1 to 4 carbon atoms, containing from 2 to 6 carbon atoms, R3, represents an alkyl radical containing from 1 to 4 carbon atoms, an alkenyl radical containing from 2 to 4 carbon atoms, an alkynyl radical containing from 2 to 4 carbon atoms, a halogenoalkyl radical containing from 1 to 4 carbon atoms, or an alkoxyalkyl radical containing from 3 to 5 carbon atoms, Y represents a halogen atom, an alkyl radical containing from 1 to 4 carbon atoms or an alkoxy radical containing from 1 to 4 carbon atoms, and n represents 1, 2 or 3) are new compounds useful as herbicides.</p> |
