Abstract
Epoxychrysanthemic acid undergoes rapid decarboxylatlon in aqueous medium at physiological pH to form a ring-opened dienol. Epoxychrysanthemates degrade in dilute acid to cyclopropane ring-opened diols. Metabolic decarboxylation of tetramethrin ( 1 ) and related chrysanthemate insecticides involves sequential enzymatic isobutenyl epoxidation, hydrolysis of the epoxychrysanthemate, and a nonenzymatic concerted decarboxylation and oxirane-ring opening reaction.
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