Compounds of the formula (I) and salts thereof in optically active form,
1
in which
R
1
, R
2
, R
3
, R
4
, A, X and n are as defined in claim
1,
are suitable for use as herbicides and plant growth regulators. The compounds (I) can be prepared by processes according to claim
7
via intermediates, some of which are novel, for example of the formulae (III) and (V).
公式(I)及其光学活性盐化合物,其中R1、R2、R3、R4、A、X和n的定义如权利要求书1所述,适用于用作
除草剂和
植物生长调节剂。化合物(I)可以通过权利要求书7所述的过程制备,其中包括一些新的中间体,例如公式(III)和(V)。