Abstract
A preparative high-speed counter-current chromatography method for isolation and purification of three acetophenones, baishouwubenzophenone, 4-hydroxyacetophenone and 2,4-dihydroxyacetophenone from the Chinese medicinal plant Cynanchum auriculatum Royle ex Wight was successfully established. With a two-phase solvent system composed of light petroleum (b.p. 60–90 °C)–ethyl acetate–methanol–water (4:9:6:6, v/v), about 20.2 mg compound 1, 35.0 mg compound 2 and 8.3 mg compound 3, each at over 95% purity as determined by LC, were obtained in one-step elution from 400 mg of the ethanol extract. The structures of these compounds were identified by UV, IR, ESI-MS, 1H NMR and 13C NMR spectroscopy. Among them, compounds 2,4-dihydroxyacetophenone and 4-hydroxyacetophenone were obtained from C. auriculatum for the first time.
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Financial support from the Ministry of Science & Technology of China (No. 2005DKA21000) and Shandong Agricultural University (No. 23489) are gratefully acknowledged.
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Sun, Y., Liu, Z., Wang, J. et al. Separation and Purification of Baishouwubenzophenone, 4-Hydroxyacetophenone and 2,4-Dihydroxyacetophenone from Cynanchum auriculatum Royle ex Wight by HSCCC. Chroma 70, 1–6 (2009). https://doi.org/10.1365/s10337-009-1107-y
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DOI: https://doi.org/10.1365/s10337-009-1107-y