Crystal structure of 3β-[5-phenyl-(2E,4E)-penta-2,4-dienoyloxy]- olean-12-ene, C41H58O2, from Peltastes peltatus
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3β-Chloro-N-methoxy-N-methylcholest-5-ene-24-carboxamide
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The title triterpene, C(30)H(50)O(2), is an 18α-oleanane derivative prepared by the Wagner-Meerwein rearrangement of betulin with Bi(OTf)(3).xH(2)O (OTF is trifluoromethanesulfonate). There are two symmetry-independent mol-ecules in the asymmetric unit that show no significant differences concerning bond lengths and angles. The conformation of the six-membered rings is close to a chair form, wh...
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متن کاملCycloart-24-ene-3β,26-diol from the leaves of Aglaia exima
Cyclo-art-24-ene-3β,26-diol, C(30)H(50)O(2), isolated from the leaves of Aglaia exima, has three six-membered rings fused together that adopt chair conformations. There are two independent mol-ecules in the asymmetric unit. O-H⋯O hydrogen bond inter-actions between the hydroxyl groups in the 3β and 26 positions lead to the formation of a layer structure parallel to (10).
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ژورنال
عنوان ژورنال: Zeitschrift für Kristallographie - New Crystal Structures
سال: 2005
ISSN: 2197-4578,1433-7266
DOI: 10.1524/ncrs.2005.220.14.378