Acta Crystallographica Section C

Crystal Structure Communications

Volume 60, Part 11 (November 2004)

organic compounds

 

Catharanthinol and dihydrocatharanthinol: two Iboga-class alkaloids

L. Moisan, E. Doris, B. Rousseau and P. Thuéry

Abstract: The title compounds are indole alkaloids of the Iboga class. In both compounds, viz. catharanthinol methanol solvate, C₂₀H₂₄N₂O·CH₄O, (I), and dihydrocatharanthinol monohydrate, C₂₀H₂₆N₂O·H₂O, (II), a nitrogen-containing seven-membered ring is fused to the indole system and shares two sides with a tricyclic isoquinuclidine group. The main difference between (I) and (II) is the presence of a C=C bond in the isoquinuclidine ring in (I). The presence of amine and hydroxy groups in these molecules and of methanol [in (I)] or water [in (II)] solvent molecules results in intra- and/or intermolecular hydrogen bonding.

Formula: C₂₀H₂₄N₂O·CH₄O and C₂₀H₂₆N₂O·H₂O

	Structure factor file (CIF format) (94.9 kbytes) Contains datablock I
	Structure factor file (CIF format) (88.1 kbytes) Contains datablock II

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