Isolation, Structure, and Biological Activities of Long-Chain Catechols of<i>Plectranthus sylvestris</i>(<i>Labiatae</i>)
作者:Mathias Juch、Peter Rüedi
DOI:10.1002/hlca.19970800209
日期:1997.3.24
Antioxidant activity guided fractionation of extracts of the aerial parts of the title plant and HPLC separation yielded a series of oxygenated long-chain alkylcatechols. Their structures were inferred by spectroscopic methods and chemical transformations to be the novel 4-[(2S,4R,6S)-4-(acetyloxy)tetrahydro-6-pentyl-2H-pyran-2-yl]benzene-1,2diol (1a), 4-[(2S,4R6S)-tetrahydro-4-hydroxy-6-pentyl-2H
抗氧化活性指导标题植物地上部分提取物的分级分离和HPLC分离,产生了一系列氧化的长链烷基邻苯二酚。通过光谱法和化学转化推断它们的结构为新颖的4-[((2 S,4 R,6 S)-4-(乙酰氧基)四氢-6-戊基-2 H-吡喃-2-基]苯- 1,2二醇(1a),4-[(2 S,4 R 6 S)-四氢-4-羟基-6-戊基-2 H-吡喃-2-基]苯-1,2-二醇(1b), 4 - [(3-小号,5小号)-5-(乙酰氧基)-3-羟基癸基]苯-1,2-二醇(2a)中,4 - [(3小号,5S)3-(乙酰氧基)-5-羟基癸基]苯-1,2-二醇(2b),(3 S,13 Z)-1-(3,4-二羟基苯基)-3-羟基docos-13-en-5 -one(3a),(Z)-1-(3,4-dihydroxyphenyl)docos-13-en-5-one(4)除已知的1-(3,4-dihydroxyphenyl)icosan-5-one(5)。通过[