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Two New, 1-Oxygenated ent-Kaurane-Type Diterpenes from Croton kongensis

✍ Scribed by Wei Chen; Xiao-Dong Yang; Jing-Feng Zhao; Hong-Bin Zhang; Liang Li

Publisher
John Wiley and Sons
Year
2007
Tongue
German
Weight
65 KB
Volume
90
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

One new ent‐8,9‐secokaurane diterpene, kongensin D (1), and one new ent‐kaurane diterpene, kongensin E (2), along with one known compound, (7__α__)‐7,18‐dihydroxy‐ent‐kaur‐16‐en‐15‐one 18‐acetate (3), were isolated from the aerial parts of Croton kongensis. The structures of the new compounds were elucidated by means of HR‐MS and in‐depth NMR experiments, and by comparison with literature data. Compounds 1 and 2 showed an unusual oxygenation pattern with an OH or AcO group at C(1).

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