tailieunhanh - Chemical constituents from the chloroform extract of the root of calotropis gigantea (linn.), asclepidaceae

From the root of Calotropis gigantea, six compounds were isolated: 12-O-benzoyllineolon (1), 12-O-benzoyldeacetylmetaplexigenin (2), calotropone (3), 2,3-dimethoxyphenol (4), 2,5- dimethoxyphenol (5), 2-formyl-5-hydroxymethylfuran (6). The chemical structure of these compounds were elucidated by their NMR spectra and comparison with references. | Tạp chí phân tích Hóa Lý và Sinh học - Tập 20 số 4 2015 CHEMICAL CONSTITUENTS FROM THE CHLOROFORM EXTRACT OF THE ROOT OF CALOTROPIS GIGANTEA LINN. ASCLEPIDACEAE Đến tòa soạn 15 - 5 - 2015 Nguyen Huu Duy Khang Falcuty of Pedagogy of Natural Science Saigon University HCM city Đang Hoang Phu Nguyen Trung Nhan Falcuty of Chemistry University of Science VNU-HCM city TÓM TẮT THÀNH PHẦN HÓA HỌC CAO CHLOROFORM CỦA RỄ CÂY BỒNG BỒNG CALOTROPIS GIGANTEA HỌ THIÊN LÝ ASCLEPIDACEAE From the root of Calotropis gigantea six compounds were isolated 12-O-benzoyllineolon 1 12-O-benzoyldeacetylmetaplexigenin 2 calotropone 3 2 3-dimethoxyphenol 4 2 5-dimethoxyphenol 5 2-formyl-5-hydroxymethylfuran 6 . The chemical structure of these compounds were elucidated by their NMR spectra and comparison with references. 1. INTRODUCTION Calotropis gigantea Linn. is a plant of Asclepidaceae family that wildly grows in many areas in the world such as Indonesia China India Vietnam . The leaves of C. gigantea were used in the treatment of paralysis swellings and intermittent fevers. Root barks were used as the treatment of asthma bronchitis and dyspepsia. Flowers could cure asthma catarrh anorexia helmintic infection and fever 1 . The chemical constituents of Calotropis gigantea have been extensively investigated leading to the isolation of many cardenolides flavonoids terpenes pregnanes 2 . In this paper we reported the isolation and structural elucidation of six compounds 12-O-benzoyllineolon 1 12-O- benzoyldeacetyl metaplexigenin 2 calotropone 3 2 3-dimethoxyphenol 4 2 5-dimethoxyphenol 5 2-formyl-5-hydroxymethylfuran 6 . 2. EXPERIMENTAL . General The NMR spectra were measured on a Bruker Avance III 500 spectrometer at 500 MHz for 1H and 125 MHz for 13C. The HR-ESI-MS were recorded on a Brucker MicrOTOF-QII mass spectrometer. All spectra were recorded at the Central Analytical Laboratory University of 368 Science Vietnam National University HCM city. . Plant material Fresh roots of .

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