The present invention relates to processes for the preparation of thietane derivatives of the formula (IA) and thietane derivatives of the formula (IB) wherein R
1
, R
2
, A
1
, A
2
, A
3
, A
4
, B, and n are as defined in the claims. The invention also relates to intermediates useful in the processes, as well as the compounds of formula (IA) and (IB) and their use as pesticides.
本发明涉及制备式(IA)的噻环烷衍
生物和式(IB)的噻环烷衍
生物的过程,其中R1、R2、A1、A2、A3、A4、B和n如权利要求所定义。本发明还涉及有用于该过程的中间体,以及式(IA)和(IB)的化合物及其作为
杀虫剂的用途。