申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0001847A1
公开(公告)日:1979-05-16
Process for the preparation of a cyanoacetate having the following general formula:
wherein each of the symbols R1 and R2 represents an alkyl group or a cycloalkyl group, by contacting cyanoacetic acid with an alkenyl halide of the general formula:
wherein R' and R2 have the same meaning as defined hereinbefore and Hal represents a halogen atom having an atomic number of at least 17, in the presence of a hydrogen-halide acceptor and a substantially inert organic solvent. The compounds of formula (I) are intermediates having uses in the manufacture of pyrethroid insecticides and other compounds.
具有以下通式的氰基乙酸酯的制备方法
其中符号 R1 和 R2 各代表一个烷基或环烷基,通过将氰基乙酸与通式为
其中 R' 和 R2 的含义与前文定义相同,Hal 代表原子序数至少为 17 的卤原子,在氢卤受体和基本惰性的有机溶剂存在下进行。式(I)化合物是中间体,可用于制造拟除虫菊酯杀虫剂和其他化合物。