Abstract: The total synthesis of an ether-type pyrethroid, Chloproxyfen, is reported in this paper. Starting from chlorobenzene, the Chloproxyfen was synthesized through the Friedel-Crafts alkylation, free radical chlorination and improved Williamson etherification. High yields were achieved in each reaction process with the overall yield of 57.6%. The method is proved to be feasible for the industrial preparation.

Key words: Pyrethroid, Organic synthcsis, Agricultural drugs, Williamson's reaction