Studies on the Isolation of 5, 3/, 4/-Trihydroxy, 7-Methoxy Isoflavone
Md. Siddiqur Rahman, Mst. Sarmina Yeasmin, A. S. M. Saem, Md. Saifur Rahman
International Research Journal of Pure and Applied Chemistry · pp. 34–41 · Published 27 Feb 2015
10.9734/IRJPAC/2015/16171Abstract
Studies were carried out on the leaves of Cassia alata. The leaf powder of Cassia alata was extracted with 80% ethanol defatted with n-hexane and resolved into water-soluble and water insoluble parts. The water-soluble part was then extracted with ethyl acetate and the extract was chromatographed over silica gel (70-230 mesh) column and successively eluted with a gradient mixture of organic solvent with increasing polarities. A new isoflavone 5, 3/, 4/-trihydroxy, 7-methoxy isoflavone was isolated by the elution of the column with ethylacetate and methanol (70:30 v/v) and the isolated compound was purified by preparative thin layer chromatography (PTLC). The compound was characterized on the basis of UV, IR, NMR, 13C- NMR and Mass spectrometry.
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