Tannins and related compounds. XLVII Rhubarb. 6 Isolation and characterization of new p-hydroxyphenylbutanones, stilbenes and gallic acid glucosides.
作者:YOSHIKI KASHIWADA、GEN-ICHIRO NONAKA、ITSUO NISHIOKA
DOI:10.1248/cpb.34.3237
日期:——
Along with the previously reported phenylbutanone glucosides, i.e., lindleyin (7), isolindleyin (8) and 4-(4'-hydroxyphenyl)-2-butanone 4'-O-β-D-glucopyranoside (9), three new related compounds (1, 2 and 3) have been isolated from a rhubarb of high quality (commercial name : ?? ?? ?? ). The structures of 1-3 were established on the basis of chemical and spectroscopic data to be 4-(4'-hydroxyphenyl)-2-butanone 4'-O-β-D-(2", 6"-di-O-galloyl)-glucopyranoside (1), 4-(4'-hydroxyphenyl)-2-butanone 4'-O-β-D-(2"-O-galloy-6"-O-cinnamoyl)-glucopyranoside (2) and 4-(4'-hydroxyphenyl)-2-butanone 4'-O-β-D-(2"-O-galloyl-6"-O-p-coumaroyl)gluocopyranoside (3). In addition, 3, 4', 5-trihydroxystilbene 4'-O-β-D-(2"-O-galloyl)-glucopyranoside (4), gallic acid 3-O-β-D-glucopyranoside (5) and gallic acid 4-O-β-D-glucopyranoside (6) have been newly isolated.
除了之前报道过的苯基丁酮葡萄糖苷,即 lindleyin (7)、isolindleyin (8) 和 4-(4'-羟基苯基)-2-丁酮 4'-O-β-D-Glucopyranoside (9),我们还从一种优质大黄(商品名:? ?? ?? ?? ?)中分离出了三种新的相关化合物(1、2 和 3)。根据化学和光谱数据,1-3 的结构被确定为 4-(4'-羟基苯基)-2-丁酮 4'-O-β-D-(2",6"-di-O-galloyl)-吡喃葡萄糖苷 (1)、4-(4'-hydroxyphenyl)-2-butanone 4'-O-β-D-(2"-O-galloyl-6"-O-cinnamoyl)-glucopyranoside (2) 和 4-(4'-hydroxyphenyl)-2-butanone 4'-O-β-D-(2"-O-galloyl-6"-O-p-coumaroyl)gluocopyranoside (3)。此外,还新分离出了 3,4',5-三羟基二苯乙烯 4'-O-β-D-(2"-O-吡咯酰基)-吡喃葡萄糖苷(4)、没食子酸 3-O-β-D-吡喃葡萄糖苷(5)和没食子酸 4-O-β-D-吡喃葡萄糖苷(6)。