Lythraceous Alkaloids. XIII. X-Ray Determination of the Molecular Structures of O-Methyllythranidine N, O, O-Triformate, 22-Bromolythranine N, O, O-Triacetate, and O-Methyldeacetyllythramine

Abstract

The crystal and molecular structures of three derivatives of Lythraceous alkaloids, O-methyllythranidine N, O, O-triformate (2), 22-bromolythranine N, O, O-triacetate (3), and O-methyldeacetyl lythramine (4) were determined. The conformational chiralities of the biphenyl group in the crystals of these compounds were in conformity with those proposed on the basis of circular dichroism studies as the predominant forms in solution.