The invention is related to a process for preparing compounds of the formula IV by means of conversion of aromatic aldehydes of the formula I using α-ketoximes of the formula II via N-oxides of the formula III to halomethyloxazoles of the formula IV,
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
, R
8
, X
1
, X
2
, X
3
, o, n1 and n2 are as defined herein.
本发明涉及一种制备式IV化合物的方法,该方法通过使用式I的芳香醛,使用式II的α-酮
肟经过式III的N-氧化物转化为式IV的卤代甲氧
噁唑。其中,R1、R2、R3、R4、R5、R6、R7、R8、X1、X2、X3、o、n1和n2的定义如本文所述。