Preparation of phenoxybenzaldehyde

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专利汇可以提供Preparation of phenoxybenzaldehyde专利检索,专利查询,专利分析的服务。并且PURPOSE: To obtain the titled compound useful as a raw material for an insecticide in high selectivity and yield, by oxidizing m-phenoxybenzyl alcohol or an ester thereof with nitric acid in a specific concentration in the presence of a sulfonic acid type anionic surfactant.
CONSTITUTION: A compound of formula I [R is H or formula II (R' is H, CH
3 or C
2 H
5 )] is oxidized with nitric acid in a concentration of 1W10wt% nitric acid in an equivalent amount of 0.5W10 times that of the compound of formula I in the presence of a sulfonic acid type anionic surfactant e.g. sodium alkylbenzenesulfonate, to give m-phenoxybenzaldehyde useful as a raw material for a pyrethroid insecticide in high yield under mild conditions with a slight content of undesirable by-products in an ordinary reactor. Preferably, the amount of the surfactant used is preferably 0.5W20wt% based on the compound of formula I, and the reaction temperature is 80W100°C.
COPYRIGHT: (C)1981,JPO&Japio,下面是Preparation of phenoxybenzaldehyde专利的具体信息内容。

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