One new flavonoid xyloside and one new natural triterpene rhamnoside from the leaves of Syzygium grande
摘要:
One new flavonoid glycoside, myricetin 4'-methyl ether 3-O-beta-D-xylopyranoside (1) and one new natural triterpene glycoside, grandoside (2) were isolated from a MeOH extract of the leaves of Syzygium grande, together with thirteen known compounds (3-15). The structures of the new compounds were determined through a combination of spectroscopic and chemical analyses. All of the isolated compounds were evaluated for their antifungal, antibacterial, anti-leishmania, DPPH radical-scavenging and cytotoxic activities by means of MTT assay. (C) 2014 Phytochemical Society of Europe. Published by Elsevier B.V. All rights reserved.
白桦脂酸和熊果酸是普遍存在的天然存在的三萜类化合物,具有多种药理活性,包括细胞毒性和抗炎活性。然而,这些三萜类化合物表现出不利的药代动力学特性以及低水溶性。已经表明,α -L-鼠李糖部分的存在正向调节次级代谢物的抗癌活性。在此我们报告合成和体外评价一系列含鼠李糖的熊果酸和桦木酸皂苷的细胞毒和抗炎活性。依靠施密特的正反程序,单鼠李糖苷、(1→4)-连接的二鼠李糖苷以及支链三鼠李糖苷和四鼠李糖苷在立体选择性完全控制的情况下以高产率合成。具有 3- O -α- L -rhamnopyranosyl-(1→4)-α- L的桦木酸皂苷- 吡喃鼠李糖残基被发现是一种对人结直肠腺癌细胞有效的细胞毒剂,不会损害健康细胞(选择性比 > 20),而含有鼠李糖的熊果酸皂苷可有效抑制 LPS 刺激的巨噬细胞诱导的 NO 过量产生。我们的研究结果表明,含有鼠李糖的熊果酸和桦木酸皂苷代表了有前景的治疗剂。
作者:Sylla, Balla、Jost, Gilles、Lavoie, Serge、Legault, Jean、Gauthier, Charles、Pichette, André
DOI:10.1016/j.bmc.2024.117737
日期:——
of ursane-type pentacyclic triterpenoids for pharmacological use is their poor aqueous solubility, which can impede their effectiveness as therapeutics agents. In this study, we present the facile synthesis of ursolic acid monodesmosides and uvaol bidesmosides, incorporating naturally occurring and water-soluble pentoses and deoxyhexose sugar moieties of opposite and -configurations at the C3 or C3/C28
One new flavonoid xyloside and one new natural triterpene rhamnoside from the leaves of Syzygium grande
作者:Mamdouh N. Samy、Sachiko Sugimoto、Katsuyoshi Matsunami、Hideaki Otsuka、Mohamed S. Kamel
DOI:10.1016/j.phytol.2014.08.009
日期:2014.12
One new flavonoid glycoside, myricetin 4'-methyl ether 3-O-beta-D-xylopyranoside (1) and one new natural triterpene glycoside, grandoside (2) were isolated from a MeOH extract of the leaves of Syzygium grande, together with thirteen known compounds (3-15). The structures of the new compounds were determined through a combination of spectroscopic and chemical analyses. All of the isolated compounds were evaluated for their antifungal, antibacterial, anti-leishmania, DPPH radical-scavenging and cytotoxic activities by means of MTT assay. (C) 2014 Phytochemical Society of Europe. Published by Elsevier B.V. All rights reserved.
Synthesis, cytotoxicity and anti-inflammatory activity of rhamnose-containing ursolic and betulinic acid saponins
Betulinic acid and ursolic acid are ubiquitous, naturally-occurring triterpenoids exhibiting various pharmacological activities including cytotoxic and anti-inflammatory activities. However, these triterpenoids display unfavorable pharmacokinetic properties as well as low aqueous solubility. It has been shown that the presence of α-L-rhamnose moieties positively modulates the anticancer activity of secondary
白桦脂酸和熊果酸是普遍存在的天然存在的三萜类化合物,具有多种药理活性,包括细胞毒性和抗炎活性。然而,这些三萜类化合物表现出不利的药代动力学特性以及低水溶性。已经表明,α -L-鼠李糖部分的存在正向调节次级代谢物的抗癌活性。在此我们报告合成和体外评价一系列含鼠李糖的熊果酸和桦木酸皂苷的细胞毒和抗炎活性。依靠施密特的正反程序,单鼠李糖苷、(1→4)-连接的二鼠李糖苷以及支链三鼠李糖苷和四鼠李糖苷在立体选择性完全控制的情况下以高产率合成。具有 3- O -α- L -rhamnopyranosyl-(1→4)-α- L的桦木酸皂苷- 吡喃鼠李糖残基被发现是一种对人结直肠腺癌细胞有效的细胞毒剂,不会损害健康细胞(选择性比 > 20),而含有鼠李糖的熊果酸皂苷可有效抑制 LPS 刺激的巨噬细胞诱导的 NO 过量产生。我们的研究结果表明,含有鼠李糖的熊果酸和桦木酸皂苷代表了有前景的治疗剂。