The present invention relates to novel acylmethylene-1,3-dioxolanes and acylmethylene-1,4-dioxanes of the general formula (I)
in which R
1
, R
2
, R
3
and n have the meanings given in the description, and also a novel process for their preparation. Acylmethylene-1,3-dioxolanes and acylmethylene-1,4-dioxanes are important intermediates for the preparation of pyrazoles and anthranilamides, which can be used as insecticides.
本发明涉及一种新型的通式(I)中的酰亚
甲基-1,3-二
氧杂
环戊烷和酰亚
甲基-1,4-二
氧杂
环烷,其中R1、R2、R3和n的含义如描述中所述,并且涉及它们的制备新方法。酰亚
甲基-1,3-二
氧杂
环戊烷和酰亚
甲基-1,4-二
氧杂
环烷是制备
吡唑和
蒽酰胺的重要
中间体,可用作
杀虫剂。