59897-92-6Relevant articles and documents
Method of producing cyclopropanecarboxylic acids and esters
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, (2008/06/13)
Novel γ-lactone derivatives are provided. These lactone derivatives, when reacted with hydrogen halide in alcohol, yield γ-halogeno-δ-unsaturated carboxylic acid esters. This ring-opening process is useful for the purpose of increasing the yield of pyrethrin analogs which are of value as insecticides and agricultural chemicals. Thus, the γ-lactone derivatives by-produced in the production process for dihalogenovinyl chrysanthemumates are caused to undergo ring-opening reaction to yield the corresponding γ-halogeno-δ-unsaturated carboxylic acid esters which are important intermediates for said pyrethrin analogs.