摘要
利用ODS反相柱、硅胶柱、SephadexLH-20等各种色谱分离技术,从蜘蛛香根及根茎的乙醇提取物中分离得到lO个化合物,根据波谱分析对化合物进行结构鉴定,分别为:双四氢呋喃木脂素-4-O-β-D一吡喃葡萄糖苷(1)、4-hydroxybenzyl-/3,D—glucopyranoside(2)、甲基熊果苷(3)、4-[(E)-3-乙氧基丙烯-1-基].2-甲氧基苯酚(4)、eugenyl.O-β-D-Dunopyranoside(5)、ethylconiferin(6)、8-羟基松脂醇_4'-O-β-D-吡喃葡萄糖苷(7)、棕榈酸(8)、原儿茶酸(9)、3-(4币-D-glucopyranosyloxy-3,5-dimethoxy)-phenyl-2E-propenol(10)。化合物5、6为从败酱科首次分离得到。通过与已报道环氧木脂素类化合物碳谱数值比较,得到了木脂素羟化和苷化位移效应规律。双环氧四氢呋喃木脂素苷化位移规律与羟化位移规律与羟基取代数目关系紧密,苷化效应中无羟基取代或单羟基取代时发生苷化位置的相应芳环对位C-1’和邻位C-3’均发生低场位移(△δ1.7),双羟基取代时仅在发生苷化位置的相应芳环对位c-1’发生低场位移(△δ2.4),邻位C-3’变化较小(△δ0.5)。羟化效应中C-8或C-8’位羟基取代除了叔碳信号低场位移至季碳(△δ34.5—37.5)外,由于远程位移效应,在C-1位高场位移(△δ3.9~5.9),其中单羟基取代的邻位c-8’低场位移(△δ6.0),而双羟基取代低场位移(△δ34.5)。其位移效应规律对于双环氧四氢呋喃木脂素的结构确定,尤其糖的连接位置和羟化位置的指定,提供了一定的判断依据。
Ten compounds were isolated from the root of Valeriana jatamansi Jones by ODS column, silica gel column and Sephadex LH-20 chromatography, etc. Their structures were elucidated by NMR, and were identified as double-tetra- hydrofuran lignans-4-O-β-D-Glucopyranoside ( 1 ), 4-hydroxybenzyl-β-D-glucopyranoside ( 2 ), methylarbutin ( 3 ), 4- [ (E) -3-ethoxyprop-l-enyl ] -2:methoxyphenol ( 4 ), eugenyl-O-D-glunopyranoside ( 5 ), ethylconiferin ( 6 ), 8 -hydroxypi- noreainol-4'-O-/3-D-glucopyranoside (7), palmitic acid ( 8 ), protocatechuic acid ( 9 ), 3- ( 4-β-D-Glucopyranosyloxy-3,5- dimethoxy)-phenyl-2E-propenol(10). Compounds 5,6 were isolated from Valerianaceae for the first time. The rule of hydroxylation and glycosidation shift effects on bisepoxy lignans were obtained by comparing the information of 13C NMR with known analogous. Glycoaidation and hydroxylation 13C NMR chemical shift effects on double-tetrahydrofuran lignans were closely related to the number of hydroxyl-substitution. The rules for effects of glycosidation at C-l'and ortho-C-3' downshift about △δ1.7 in no hydroxy or mono-hydroxy substitution, C-1 'downshift about △δ2.4 in double-hydroxy substitution,while ortho-C-3' only changes a little(ZXS0.5). In hydmxylation, tertiary carbon downshift to quaternary carbon (△δ34.5-37.5) when hydroxy substitution at C-8 or C-8'. Besides,the C-1 upshift about △δ3.9-5.9 because of the effect of distance effect. C-8' on mono-hydmxy substituted aromatic ring moves to low field(△δ05.0) ,while dowmhifts△δ34.5 for double-hydroxy substitution. The rules of dis-placement provided suggestion for the confirmation of double-tetrahydrofuran lignans, especially the position of hydroxyl- ation and glycosylation.
出处
《天然产物研究与开发》
CAS
CSCD
北大核心
2016年第7期1045-1050,共6页
Natural Product Research and Development
基金
国家基础科学人才培养基金(J13100340-11)
中药药效物质基础研究与创新中药发现四川省青年科技创新研究团队(2016TD0006)
四川省教育厅重点项目-(15ZA0093)
成都中医药大学科技发展基金(ZRQN1440)
四川省中医药管理局基金(2016Q049)
关键词
蜘蛛香
化学成分
波谱特征
Valeriana jatamansi Jones
chemical constituent
spectral characteristics