共查询到19条相似文献,搜索用时 125 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
甾体化合物是一类生物体中广泛存在并起重要功能的生物分子。其特殊结构使这类化合物具有亲脂性,膜亲合性以及与低密度脂蛋白的特异性结合等性能。利用这些特性设计合成各种药物分子的甾体缀合物,可增加药物分子的脂溶性,提高跨膜渗透能力,在特定组织中的分布以及甾体缀合物自身具有独特的生物活性,对探索新型生物活性分子具有重要意义。本文介绍了近年来在设计合成新型甾体缀合物领域的研究进展,包括甾体药物缀合物、含磷甾体缀合物、作为离子通道和分子载体的缀合物及甾体二聚缀合物等。 相似文献
11.
金丝矮陀陀植物中甾体生物碱的分离与化学结构 总被引:1,自引:0,他引:1
最近,我们研究了云南产的金丝矮陀陀植物中的甾体生物碱。对植物样品的乙醇提取物作了系统分离,从中得到22个甾体生物碱, 相似文献
12.
羟乙基化牛膝多糖的合成及其活性研究 总被引:5,自引:0,他引:5
以环氧乙烷为羟乙基化试剂,在碱性水溶液中,对牛膝多糖进行羟乙基化,经 过丙酮沉淀、膜分离、Sephadex G-25柱层析等分离方法得到羟乙基化牛膝多糖纯 品,检测其理化性质,并通过甲基化、GC-MS分析,初步确证糖链中羟乙基主要取 代在葡萄糖6位和困糖的1位上。药理实验表明,羟乙基化牛膝多糖对荷Lewis肺癌 小鼠NK活性具有一定促进作用。 相似文献
13.
以乙醇(或甲醇为溶剂),冰醋酸为催化剂,去氢表雄酮、孕烯醇酮、雌酮和3,5-二羟基-6-甲酰基-B-降胆甾烷分别与N,N-二甲基硫代氨基脲经缩合反应,合成了4个新型的具有不同甾核结构特征的甾体N,N-二甲基缩氨硫腙类化合物(1~4),其结构经1H NMR, 13C NMR, IR和HR-EI-MS表征。采用MTT法测定了1~4对肝癌细胞(HepG)、人鼻咽癌细胞(CNE-2)和人肾上皮细胞(HEK-293T)的体外抑制细胞生长增殖活性。结果表明:1~3对HepG和CNE-2具有明显的抑制活性。 相似文献
14.
A new binuclear copper(Ⅱ) complex containing fluoroquinolone ligand, [Cu2(cfc)2(bpy)2(pip)]·6H2O, was synthesized and its crystal structure was solved. The formula of the complex is C25H26ClCuFN4O6, and the crystal-lography data are as follows, triclinic, space group P1, a=6.874(2)?, b=10.761(3)?, c=17.976(5)?, α=80.071(6)°, β=85.253(6)°, γ=79.109(6)°, V=1284.5(6)?3, D=1.542g·cm-3, F(000)=614, and Z=2. R1=0.0776 and wR2=0.2235(I >2σ(I)). The copper atom is five-coordinate with square-based pyramidal geometry and involves two nitrogen atoms from bpy, two oxygen atoms from cfc and one nitrogen atom from pip anion. The stacking effect between cfc and bpy ligands from two neighboring molecules was observed. Both ligand and complex were assayed against gram-positive and gram-negative bacteria by doubling dilutions method, the complex shows the same minimal inhibitory concentration (MIC) as the corresponding ligand against S.Aureus and E.Coli bacteria. The inhibitory effect of the ligand and complex on leukemia HL-60 cell line and liver cancer BEL-7402 cell line have been measured by using MTT (Methyl-Thiazol- Tetrozolium) and SRB (Sulphurhodamin B) assay methods. The results indicated that the complex has strong inhibitory effect on HL-60 cell line and on BEL-7402 cell line. CCDC: 191087. 相似文献
15.
Veselin Nasufović Dr. Florian Küllmer Johanna Bößneck Dr. Hans-Martin Dahse Dr. Helmar Görls Dr. Peter Bellstedt Dr. Pierre Stallforth Prof. Dr. Hans-Dieter Arndt 《Chemistry (Weinheim an der Bergstrasse, Germany)》2021,27(45):11633-11642
The first total synthesis of the actin-stabilizing marine natural product geodiamolide H was achieved. Solid-phase based peptide assembly paired with scalable stereoselective syntheses of polyketide building blocks and an optimized esterification set the stage for investigating the key ring-closing metathesis. Geodiamolide H and synthetic analogues were characterized for their toxicity and for antiproliferative effects in cellulo, by characterising actin polymerization induction in vitro, and by docking on the F-actin target and property computation in silico, for a better understanding of structure-activity relationships (SAR). A non-natural analogue of geodiamolide H was discovered to be most potent in the series, suggesting significant potential for tool compound design. 相似文献
16.
以BMS-777607和E7050为先导化合物,设计并合成了11个新型的吡啶类c-Met激酶抑制剂(9a~9f和10a~10e),其结构经1H NMR和MS(ESI)表征。采用MTT法测定了9a~9f和10a~10e对人胃癌细胞株(NCI-N87和GTL-16)的体外抗肿瘤细胞增殖活性。结果表明:9a, 9d和10a对GTL-16的抑制活性较好,其IC50分别为0.60 μmol·L-1, 1.36 μmol·L-1和0.93 μmol·L-1,优于BMS-777607(2.50 μmol·L-1)。 相似文献
17.
双核铜(Ⅱ)-氟喹诺酮-邻菲咯啉混配配合物的合成、晶体结构和抗肿瘤活性 总被引:6,自引:0,他引:6
A new binuclear copper (Ⅱ) complex with 1,10-phen and fluoroquinolone ligands, [Cu2(cfc)2(phen)2(pip)](NO3)2(CO)2,was synthesized and its crystal structure was solved.The formula of the complex is C28H24ClCuFN5O7, and the crystallography data are as follows, triclinic, space group P1, a=0.80372(6)nm, b=0.94712 (7)nm, c=1.67826(13)nm, α=88.5650(10)°, β=80.9920(10)°, γ=70.2780(10)°, V=1.18722(6)nm3, Z=2, D=1.848g· cm-3, F(000)=676. R1=0.0627 and wR2=0.1684 (I>2σ(I)). The copper atom is five- coordinate with square-based pyramidal geometry and involves two nitrogen atoms from phen, two oxygen atoms from cfc and one nitrogen atom from pip anion. The stacking effect between cfc and phen ligands from two neighboring molecules was observed. FT-IR spectrum of the complex was also discussed. Both ligand and complex were assayed against gram-positive and gram-negative bacteria by doubling dilutions method; the complex shows the same mini-mal inhibitory concentration (MIC) as the corresponding ligand against S. Aureus, E. Coli and M. Lutens bac-teria. The inhibitory effect of the ligand and complex on leukemia HL-60 cell line and liver cancer BEL-7402 cell line have been measured by using MTT (Methyl-Thiazol- Tetrozolium) and SRB (Sulphurhodamin B) assay meth-ods, respectively. The results indicated that the complex has strong inhibitory effect on HL-60 and BEL-7402 cell line. CCDC: 203964. 相似文献
18.
19.
三环己基氢氧化锡与L-扁桃酸(物质的量比1:1)在苯和乙醇混合溶剂中反应合成了三环己基锡L-扁桃酸酯。 经X射线衍射方法测定了其晶体结构,配合物属斜方晶系,空间群为P212121,晶体学参数a=0.80825(4) nm,b=1.77151(8) nm,c=1.8385(2) nm,α=β=γ=90°,V=2.6324(2) nm3,Z=4,Dc=1.310 g/nm3,μ(MoKα)=9.92 cm-1,F(000)=1080,R1=0.0472,wR2=0.1341。 中心锡原子与环己基碳原子和氧原子构成畸型四面体。 对其结构进行量子化学从头计算,探讨了配合物的稳定性、分子轨道能量以及一些前沿分子轨道的组成特征。 研究了配合物的热稳定性、电化学性能、圆二色谱和体外抗癌活性。 相似文献