Synthesis of Deltamethrin

To a flask equipped with magnetic stirrer add 1.98 g of 3-phenoxybenzaldehyde, 10 ml of n-heptane, 22 ml of 1,4-diazabicyclo[2.2.2]octane, 0.59 g of sodium cyanide, 1 ml of water and 3.32 g of 1-(2,2-dibromoethenyl)-2,2-dimethylcyclopropane-1-carbonyl chloride dissolved in 10 ml of n-heptane with stirring. Stir for 2h, distill the residual n-heptane off and dry the residue with anhydrous magnesium sulfate. The residue may be purified by high vacuum distillation.

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