The invention provides novel compounds of formula I, useful as intermediates for insecticidal ethers,
wherein W represents 1 to 4 substituents selected from halo, alkyl, alkoxy, haloalkyl, haloalkoxy and alkoxyalkyl, or W represents a bidentate alkylene or alkylenedioxy group linking adjacent carbon atoms, X represents fluoroalkyl, and Y is selected from chlorine, bromine and alkoxy; and a process for preparing said ethers. The compounds of formula I are prepared by reacting a ketone of formula:
with a phosphonium salt of formula Hal⁻ (Q)₃P⁺-CH₂-Y, where Hal⁻ represents a halide ion and Q represents alkyl or aryl.
本发明提供了可用作杀虫醚中间体的新型式 I 化合物,其中 W 代表 1 至 4 个选自卤代、烷基、烷氧基、卤代烷基、卤代烷氧基和烷氧基烷基的取代基,或 W 代表连接相邻碳原子的双叉亚烷基或亚烷基二氧基基团,X 代表
氟代烷基,Y 选自
氯、
溴和烷氧基;以及制备所述醚的工艺。 式 I 化合物通过使式:的酮与式 Hal- (Q)₃P⁺-CH₂-Y 的
鏻盐反应制备,其中 Hal- 代表卤离子,Q 代表烷基或芳基。