摘要
选取京尼平苷、龙胆苦苷、獐牙菜苦苷、梓醇四种天然环烯醚萜,通过简单的结构修饰获得相应的衍生物,并考察它们与最简单的含伯胺基化合物———甲胺的呈色反应性能,通过紫外-可见光谱(UV-vis)分析它们所形成色素的颜色与其结构之间的关系。结果表明:(1)采用β-葡萄糖苷酶对京尼平苷酸进行水解,可以得到相应的苷元;但按照同样的方法处理梓醇,却得不到相应的苷元;通过苷交换的方法处理龙胆苦苷和獐牙菜苦苷,都可以的到相应的目标产物——甲基龙胆苦苷苷元和甲基獐牙菜苦苷苷元,但是用同样的方法处理梓醇,却得不到甲基梓醇苷元。这可能是由于梓醇特殊的结构引起的。(2)甲基龙胆苦苷苷元与甲基獐牙菜苦苷苷元的结构相似,它们与甲胺反应生成色素颜色也相似,都是亮黄色。但是,京尼平与京尼平苷酸苷元的结构也很相似,但是二者与甲胺反应生成色素的差别很大,前者是蓝黑色,后者是紫红色。这说明,环烯醚萜骨架上取代基的位置对呈色性能影响很大。
Derivatives of four natural iridoids （geniposide, swertiamarin, gentiopicroside and catalpol） were obtained by structural modifications. The modification products were adopted to react with methylamine to investigate their color-forming properties, the relationship between color of the pigments and compounds＇ structure were analyzed via Ultraviolet-visible spectroscopy （UV-vis）. The results indicated that： （1） The corresponding aglycone could be obtained by the hydrolysis of geniposidic acid under the catalysis of ^-glucosidase, however, the same process could not happen for catapol; swertiamarin aglycone and methylswertimarin aglyeone could be obtained by swertiamarin and gentiopicroside reacted with methanol, how- ever, the same process could not happen for catapol. These reason might be reduced by the special structure of catapol. （2） Methygentiopicroside aglycone and methylswertimarin aglycone have a similar structure, and their pigments obtained from the reaction with methylamine is also similar--bright yellow; however, for geniposidic acid aglyeone and genipin, which also have a similar structure, their pigments obtained from the reaction with methylamine is different--one is dark blue and the other is purple red. This result indicated that, the position of substitute groups have key effection for the color of pigments formed.
出处
《皮革科学与工程》
CAS
北大核心
2013年第5期15-19,共5页
Leather Science and Engineering
基金
国家自然科学基金项目"天然环烯醚萜及其类似合成产物的交联呈色机理和构效关系研究"(项目编号:21176202)
西南民族大学研究生创新科研研一般项目(CX2013SP02)
关键词
环烯醚萜
衍生物
甲胺
呈色性能
iridoids, derivatives
methylamine
color-forming properties
