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Issue 4, 1991
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ent-12-Oxolabda-8,13(16)-dien-15-oic acid and ent-8β,12α-epidioxy-12β-hydroxylabda-9(11),13-dien-15-oic acid γ-lactone: two new diterpenes from the aerial parts of Premna oligotricha.

Abstract

Two novel ent-labdane diterpenes have been isolated from the aerial parts of Premna oligotricha(Verbenaceae). Primarily through NMR studies one was identified as ent-12-oxolabda-8,3(16)dien-15-oic acid. Similar analysis of the second diterpene was unable to distinguish between two possible structures, ent-8β,12α-epidioxy-12β-hydroxylabda-9(11),13-dien-15-oic acid γ-lactone and ent-8β,12α-epoxy-12β-hydroperoxylabda-9(11),13-dien-15-oic acid δ-lactone. The structure of the second diterpene was established as the γ-lactone by an X-ray diffraction study

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Article type: Paper
DOI: 10.1039/P19910000893
Citation: J. Chem. Soc., Perkin Trans. 1, 1991,0, 893-896
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    ent-12-Oxolabda-8,13(16)-dien-15-oic acid and ent-8β,12α-epidioxy-12β-hydroxylabda-9(11),13-dien-15-oic acid γ-lactone: two new diterpenes from the aerial parts of Premna oligotricha.

    S. Habtemariam, A. I. Gray, C. Lavaud, G. Massiot, B. W. Skelton, P. G. Waterman and A. H. White, J. Chem. Soc., Perkin Trans. 1, 1991, 0, 893
    DOI: 10.1039/P19910000893

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