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[摘要]
目的 研究杜鹃花科植物云锦杜鹃Rhododendron fortunei 枝叶的化学成分。方法 对云锦杜鹃95%乙醇提取物的醋酸乙酯部位采用硅胶、凝胶Sephadex LH-20等柱色谱手段进行化学成分的分离纯化,通过理化性质和波谱数据进行结构鉴定。结果 分离得到12个化合物,分别鉴定为山柰酚-3-O-α-L-鼠李糖苷(1)、槲皮苷(2)、杨梅树皮素-3-O-α-L-鼠李糖苷(3)、反式咖啡酸(4)、顺式咖啡酸(5)、(2R, 3S)-6, 8-di-C-methyldihydrokaempferol(6)、秦皮素(7)、原儿茶酸(8)、槲皮素(9)、山柰酚(10)、杨梅素(11)、梫木毒素I(12)。结论 所有化合物均为首次从云锦杜鹃枝叶中分离得到,其中化合物1~8、10首次从杜鹃花属植物中分离得到,化合物3~7首次从杜鹃花科植物中分离得到。
[Key word]
[Abstract]
Objective To study the chemical constituents in the twigs and leaves of Rhododendron fortunei. Methods The ethyl acetate fraction of 95% ethanol extract from R. fortunei was separated and purified by silica gel and Sephadex LH-20 column chromatography. The structures of the compounds were identified by physicochemical properties and various spectroscopic methods. Results Twelve compounds were isolated as kaempferol 3-O-α-L-rhamnopyranoside (1), quercitrin (2), myricetin-3-O-α-L- rhamnoside (3), trans-caffeic acid (4), cis-caffeic acid (5), (2R, 3S)-6, 8-di-C-methyldihydrokaempferol (6), fraxetol (7), protocatechuic acid (8), quercetin (9), kaempferol (10), myricetin (11), and grayanotoxin I (12). Conclusion All the compounds are isolated from the twigs and leaves of R. fortunei for the first time. Compounds 1—8 and 10 are isolated from the plants of Rhododendron L. for the first time, and compounds 3—7 are isolated from the plants in Ericaceae for the first time.
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[基金项目]
国家自然科学基金资助项目(81001368);教育部留学回国人员科研启动基金(第四十批)资助项目;国家科技支撑计划项目(2012BAC11B02-6);吉安市科技支撑项目(吉市科计字 [2010] 18);井冈山大学校级课题(JZ10019)