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A NEW SESQUITERPENE KETO–LACTONE FROMSENECIO

Abdel-Azim M. Habib, Ali Metwally

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Abstract

A new sesquiterpene lactone (C 16 H 22 O 4 , m. p. 235–8, [α] 29 D – 94.5°) was isolated from Senecio aegyptius. The new lactone was proved by chemical and spectral means to have a γ–lactone ring structure, a secondary hydroxyl group, a ketonic carbonyl and a terminal méthylène group conjugated with the lactone. The acetyl derivative and the oxime were prepared and some physical and chemical data are given for them.

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What this paper is about

A new sesquiterpene lactone (C 16 H 22 O 4 , m. p. 235–8, [α] 29 D – 94.5°) was isolated from Senecio aegyptius. The new lactone was proved by chemical and spectral means to have a γ–lactone ring structure, a secondary hydroxyl group, a ketonic carbonyl and a terminal méthylène group conjugated with the lactone. The acetyl derivative and the oxime were prepared and some physical and chemical data are given for them.

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Available abstract

A new sesquiterpene lactone (C 16 H 22 O 4 , m. p. 235–8, [α] 29 D – 94.5°) was isolated from Senecio aegyptius. The new lactone was proved by chemical and spectral means to have a γ–lactone ring structure, a secondary hydroxyl group, a ketonic carbonyl and a terminal méthylène group conjugated with the lactone. The acetyl derivative and the oxime were prepared and some physical and chemical data are given for them.

Key concepts: Lactone, Sesquiterpene lactone, Sesquiterpene, Stereochemistry, Senecio, Chemistry, Derivative (finance), Ring (chemistry)

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