Molecular Formula | C14H11NO2 |
Molar Mass | 225.24 |
Storage Condition | 0-6°C |
Physical and Chemical Properties | Chemical Properties The n20D 1.5664 of this product has 1.1130 relative density, insoluble in water, soluble in benzene, toluene and other organic solvents. |
Use | Use α-cyano-3-phenoxybenzyl alcohol is referred to as cyanohydrin, and is an intermediate of pyrethroid insecticides such as Deltamethrin, cypermethrin, cyhalothrin, fenvalerate, fenvalerate, and cyfluthrin. |
EPA chemical information | Benzeneacetonitrile, .alpha.-hydroxy-3-phenoxy- (39515-47-4) |
The preparation method is to react 3-phenoxybenzaldehyde with potassium cyanide (or sodium cyanide) in a solvent under neutral conditions to obtain (±)α-cyano-3-phenoxybenzyl alcohol.
It is also possible to react the adduct obtained by the reaction of m-phenoxybenzaldehyde with sodium cyanite with potassium cyanide to prepare α-cyano-3-phenoxybenzyl alcohol, which has a higher yield.
α-cyano-3-phenoxybenzyl alcohol is generally unstable and easy to decompose during storage. For this reason, when α-cyano-3-phenoxybenzyl alcohol is required for the preparation of pyrethroids, it is now in use. Using the acyl chloride-ether aldehyde method, that is, chrysanthemum chloride, m-phenoxybenzaldehyde, and sodium cyanide are reacted in a solvent in the presence of a phase transfer catalyst to prepare pyrethro, during the reaction process, 3-phenoxybenzaldehyde reacts with sodium cyanide to generate cyanohydrin, and immediately reacts with chrysanthemum chloride to generate pyrethroids. The reaction is very rapid and the yield is very high. Now most industries use this method to produce pyrethroids.