Tenuiflorins A - C: New 2-Phenoxychromones from the Leaves of Mimosa tenuiflora

Abstract

Five 2-phenoxychromones, the new tenuiflorin A [5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenoxy)-6-methoxychromone], tenuiflorin B [5,7-dihydroxy-2-(4-hydroxy-3-methoxyphenoxy)-6-methoxychromone] and tenuiflorin C [5,7-dihydroxy-2-(3-hydroxy-4-methoxyphenoxy)chromone], along with the known 6-demethoxycapillarisin and 6-demethoxy-4′-O-methylcapillarisin were isolated from leaves of Mimosa tenuiflora. Structures of these compounds were established by analysis of their spectroscopic data. A single-crystal diffraction analysis of 6-demethoxy-4′-O-methylcapillarisin was performed in order to confirm the proposed structures.

Key words

Mimosa tenuiflora - Leguminosae - 2-phenoxychromones - tenuiflorins A, B and C

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