ISSN:
1572-8854
Keywords:
Alkaloid
;
Strychnos
;
acetone solvate
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract The molecular structure of malagashanine (C23H30N2O4), a new alkaloid occurring in MadagascanStrychnos species and showing chloroquine-potentiating action, has been determined by single crystal X-ray diffraction. The crystals, in the form of a 1∶1 acetone solvate, are monoclinic, space group P21, witha=10.328(2),b=10.554(6),c=11.490(5)Å, β=96.67(2)0,Z=2. Refinement based on 3650 reflections measured at 294K yieldedR=0.045. The X-ray analysis shows that the ring system in malagashanine differs from that in alkaloids of the strychnobrasiline type in containing only five-and six-membered rings. Thermal analysis of the solvate indicates that the acetone molecules are firmly held in the crystal and the X-ray analysis reveals that they are trapped in crystal voids. Only van der Waals forces and C−H...O hydrogen bonds stabilize the crystal structure.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01670325
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