Microtropins J-P: 6’-O-(2”<i>S</i>,3”<i>R</i>)-2”-Ethyl-2”,3”-Dihydroxybutyrates of Phenolic Alcohol <i>&#223</i>-D-Glucopyranosides from the Branches of <i>Microtropis japonica</i>  

作　　者：Yuka Uemura Sachiko Sugimoto Katsuyoshi Matsunami Hideaki Otsuka Yoshio Takeda 

机构地区：[1]Department of Natural Products Chemistry, Faculty of Pharmacy, Yasuda Women’s University, Hiroshima, Japan. [2]Department of Pharmacognosy, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan

出　　处：《American Journal of Plant Sciences》2013年第10期1954-1959,共6页美国植物学期刊（英文）

摘　　要：From the branches of Microtropis japonica (Celastraceae), seven phenolic alcohol glucosides, named microtropins J-P (1-7), were isolated. The 6-position of glucose was esterified with 2-ethyl-2,3-dihydroxybutyric acid. Microtropin K (2) was hydrolyzed under a mild basic condition to give methyl (2S,3R)-2-ethyl-2,3-dihydroxybutyrate, whose absolute structure was determined by the comparison of NMR data and the optical rotation value with that reported.From the branches of Microtropis japonica (Celastraceae), seven phenolic alcohol glucosides, named microtropins J-P (1-7), were isolated. The 6-position of glucose was esterified with 2-ethyl-2,3-dihydroxybutyric acid. Microtropin K (2) was hydrolyzed under a mild basic condition to give methyl (2S,3R)-2-ethyl-2,3-dihydroxybutyrate, whose absolute structure was determined by the comparison of NMR data and the optical rotation value with that reported.

关 键 词：Microtropis JAPONICA CELASTRACEAE Microtropin (2S 3R)-2-Ethyl-2 3-Dihydroxybutyrate 

分 类 号：R28[医药卫生—中药学]