Abstract
To elucidate the relationship between the rate of the addition reaction to the exomethylene bond of the lactone ring and the biological activity of sesquiterpene lactones a kinetic study has been made of the amination of guaianolides containing an α,β-unsaturated lactone ring. An interrelationship has been established between biological activity, rate of the amination reaction, and the presence in the molecule of such substituents as chlorine and epoxy and ester groups.
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