14-Hydroxy-8,14-secogammacera-7-ene-3,21-dione from the bark of Lansium domesticum Corr.
نویسندگان
چکیده
In the title compound (kokosanolide B), C(30)H(48)O(3), the hexa-hydro- and octa-hydro-naphthalen-2-one ring systems are connected through an ethyl-ene fragment, with a C-CH(2)-CH(2)-C torsion angle of 176.2 (2)°. The cyclo-hexene ring adopts a half-chair conformation, while the other six-membered rings adopt distorted chair conformations. In the crystal, adjacent mol-ecules are linked into a zigzag chain along the b axis by O-H⋯O hydrogen bonds involving the hy-droxy and carbonyl groups.
منابع مشابه
8,14-Secogammacera-7,14(27)-diene-3,21-dione–8,14-secogammacera-7,14-diene-3,21-dione (1.5/0.5) from the bark of Lansium domesticum Corr.
The components of the title cocrystal, 1.5C(30)H(40)O(2)·0.5C(30)H(40)O(2), each have two tetra-hydro-deca-lin-type fused rings connected through an ethyl-ene fragment [R-CH(2)-CH(2)-R' torsion angles: 158.1 (7) ° in the major component and 157.5 (6)° in the minor component]. The structure is a non-merohedral twin, with a minor twin component of 26%. The exocyclic double-bonded C atom of the ma...
متن کاملAntifeedant triterpenoids from the seeds and bark of Lansium domesticum cv Kokossan (Meliaceae).
Two tetranortriterpenoids, kokosanolide A (1) and C (2) were isolated from the seeds and three onoceranoid-type triterpenoids: kokosanolide B (3), 8,14-secogammacera-7,14-diene-3,21-dione (4) and a 1.5:0.5 mixture of 8,14-secogammacera-7,14(27)-diene-3,21-dione (5) and compound 4 were isolated from the bark of kokossan (Lansium domesticum). Complete 1H- and 13C-NMR data of the triterpenoids 1-5...
متن کاملKokosanolide from the seed of Lansium domesticum Corr.
IN THE TITLE COMPOUND, [SYSTEMATIC NAME: 8,14-secogammacera-7,14(27)-diene-3,21-dione], C(27)H(32)O(9), each of the six-membered rings adopts the common chair conformation. In the crystal, mol-ecules are linked by an O-H⋯O(ester) hydrogen bond into a helical chain.
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