| 摘要 |
<p>Novel compounds of the general formula (I) in which each of R1 and R2 independently represents a hydrogen atom or an optionally-substituted alkyl, cycloalkyl or aryl group, or R1 and R2 together represent an alkylene group; each or R3 R4, R5 and R independently represents a hydrogen atom or an optionally-substituted alkyl, alkoxy or aryl group; R7 represents an optionally-substituted alkyl group; and R8 represents a hydrogen atom or an optionally-substituted alkyl group, may be cyclised to form an oxolane of the general formula (II) The oxolanes (II) are useful in the preparation Or herbicidally active compounds.</p> |
