3-Acetoxymethyl-2,2- dimethylcyclopropanecarbaldehy- de dimethyl acetal, especially in the same stereoisomeric form as that of the cyclopropane ring in (+)-3-carene, is a novel intermediate useful in the manufacture of pyrethroid insecticides. It may be manufactured by a process characterised in that 2-(3-acetoxy-methyl-2,2- dimethylcyclopropy-Dvinyl acetate is subjected to ozonolysis and the ozonolysis product so formed is subjected to reduction in the presence of methanol and an acetalizing catalyst.
3-乙酰氧甲基-2,2-二
甲基环丙烷-
甲醛-二
甲缩醛,尤其是与(+)-
3-蒈烯中
环丙烷环的立体异构体形式相同的立体异构体,是一种新型中间体,可用于生产拟
除虫菊酯类杀虫剂。其生产工艺的特点是将 2-(3-乙酰氧基甲基-2,2-二甲基环丙基)
乙酸乙烯酯进行
臭氧分解,然后在
甲醇和
缩醛催化剂的作用下将
臭氧分解产物还原。