5-取代嘧啶开环核苷膦酸酯类化合物的合成及其抗病毒活性研究

目的：设计合成5-取代嘧啶开环核苷膦酸酯类新化合物并进行体外抗病毒活性实验。方法：氯甲基氯乙基醚与三氟乙醇磷酸酯缩合后,经碘-氯交换得碘代乙氧基甲基三氟乙醇膦酸酯侧链,和5-取代嘧啶在DBU作用下缩合,氯甲酸酯酰胺化,设计合成得到8个新化合物1a～1h。对合成的目标化合物进行了初步的体外抗乙肝病毒药理活性实验。,结果：设计合成的8个化舍物对HBsAg和HBeAg都有一定的抑制作用,其中化合物1d的抑制活性优于拉米夫定。结论：5-取代嘧啶开环核苷膦酸酯类化合物保持抗病毒活性,N6位长链脂肪氯甲酸酯取代的化合物抗HBV病毒活性较好。     

天然产物4-O-β-D-葡萄糖-苯并噁唑酮及 4-取代苯并噁唑酮衍生物的合成与活性研究

目的 设计合成天然产物4-O-β-D-葡萄糖-苯并噁唑酮及4-取代苯并噁唑酮类衍生物,并对其抗炎活性、抗乙肝病毒活性进行初步的评价。方法 以2-氨基-间苯二酚为原料,与固体三光气缩合制得4-羟基-苯并噁唑酮,再与溴代糖经过糖苷化反应制得4-取代苯并噁唑酮糖苷类化合物;4-羟基-苯并噁唑酮与酰氯及磺酰氯反应制得4-取代苯并噁唑酮酯类化合物。采用二甲苯致小鼠耳肿胀法测定目标化合物的抗炎活性;采用MTT法测定抗乙肝病毒活性。结果与结论 共合成了10个目标化合物,其中9个化合物未见文献报道,其结构经IR、ESI-MS、¹H-NMR谱确证;活性测试表明,化合物2d、4a、4b具有较好的抗炎活性,化合物2c具有一定的抗乙肝病毒活性。     

三唑并[4,5-d]嘧啶类化合物的合成及其抗血小板聚集活性研究

目的合成新的三唑并[4,5-d]嘧啶类化合物,并对其体外抗血小板聚集活性进行评价。方法以抗血栓新药替格瑞洛为先导化合物,对其进行结构简化,将难以合成的环戊醇结构用简单的链状醇结构代替,设计合成了一系列三唑并[4,5-d]嘧啶类化合物。以氨基醇为原料,首先与4,6-二氯-2-正丙巯基嘧啶-5-胺进行缩合,然后环化成三唑环,再与各种取代胺发生第二次缩合,最终合成目标化合物。采用Born氏法对化合物抗兔血小板聚集活性进行了评价。结果与结论共合成了17个新的三唑并[4,5-d]嘧啶类化合物,其结构均经1H-NMR、13C-NMR和MS谱确证。体外抗血小板聚集活性结果显示,具有邻二羟基结构的化合物的活性明显高于其他化合物,表明邻二羟基是该类化合物的关键活性基团。化合物9i对血小板聚集的抑制率为75.2%,约为阳性对照药替格瑞洛的80%,但其结构远比替格瑞洛简单,更易于合成,可作为先导化合物继续进行结构优化,以期发现更高效的抗血栓新药。     

4H-吡啶并[1,2-a]嘧啶-4-酮取代的双芳基脲类化合物的合成及抗增殖活性

目的设计合成4H-吡啶并[1,2-a]嘧啶-4-酮取代的双芳基脲类化合物,初步评价其体外抗增殖活性。方法以2-氨基吡啶或2-氨基-4-甲基吡啶为原料,经环合、烃化、还原及酰化共4步反应合成目标化合物;以sorafenib为阳性对照,采用MTT法,测试目标化合物对乳腺癌细胞株MDA-MB-231的抗增殖活性。结果与结论合成了16个未见报道的含4H-吡啶并[1,2-a]嘧啶-4-酮药效团的双芳基脲类化合物,其结构经1H-NMR和MS确证;8个化合物显示较好的体外活性,其中,化合物4h活性突出,为sorafenib的8.3倍。     

2-取代-4-氨基噻吩并[3,2-d]嘧啶类化合物的合成及抗增殖活性

目的设计并合成2-取代-4-氨基噻吩并[3,2-d]嘧啶类化合物,评价其体外抗增殖活性。方法以3-氨基-2-噻吩甲酸甲酯为起始原料,经6步反应合成目标化合物;以CP-31398为阳性对照药,采用MTT[3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide]法测定了目标化合物对肿瘤细胞株H-460和HT-29的抗增殖活性。结果与结论合成16个未见文献报道的化合物,其结构经1H-NMR、MS确证;5个化合物显示较好的抗增殖活性,其中,化合物8n活性突出,为CP-31398的4-5倍。     

[1,2,4]三氮唑并[1,5-a]嘧啶类化合物的合成及其抗肿瘤活性

目的寻找具有抗肿瘤活性的新化合物,设计合成[1,2,4]三氮唑并[1,5-a]嘧啶衍生物,并评价其体外抗肿瘤活性。方法以γ-丁内酯为起始原料,经环合、氯代、取代、硫醚化和氨甲基化等反应合成7-苯基氨基-2-[3-(5-取代氨基甲基-呋喃-2-基-甲硫基)丙基]-5-甲基-[1,2,4]三氮唑并[1,5-a]嘧啶类化合物。采用MTT法,以顺铂为阳性对照药,以Bel-7402和HT-1080为测试细胞株对目标化合物的抗肿瘤活性进行了评价。结果与结论合成了12个未见文献报道的新化合物,结构经质谱、红外光谱和核磁共振氢谱确证。体外活性实验表明:化合物16显示出很好的抗肿瘤活性。     

7-羟基喹啉-3-羧酸乙酯类化合物的合成及体外抗乙肝病毒活性

摘 要：目的 设计合成一系列7-羟基喹啉-3-羧酸乙酯类化合物，并对其抗乙肝病毒活性进行初步评价。方法 以香兰醛为起始原料，经7~9步反应合成目标化合物；测定目标化合物对HepG2.2.15细胞中乙肝病毒的抑制作用及其细胞毒性。结果与结论 共合成12个新化合物，其结构经MS、IR和¹H-NMR谱确证。体外活性测试表明，多数化合物显示出不同程度的乙肝病毒抑制活性，其中，化合物11a、12c的活性优于对照药拉米夫定。     

4-芳氨基-6-溴喹唑啉类化合物的合成及抗肿瘤活性的初步研究

目的 设计合成新的4-芳氨基-6-溴喹唑啉类化合物,并评价其抗肿瘤活性。 方法 以4-氯-6-溴喹唑啉和含有不同取代基的(E)-氨基二苯乙烯或4-[2-（2-呋喃基）]乙烯基苯胺为原料,经过亲核取代反应合成了5种目标化合物。采用MTT法,以人低分化胃癌细胞（BGC-823）和人肺癌细胞（A549）为受试细胞株对目标化合物进行体外抗肿瘤活性评价。 结果与结论 所得化合物的结构利用IR、1HNMR、13CNMR和元素分析进行了确认。5种化合物对BGC-823和A549两种细胞模型的体外抗肿瘤活性测试结果表明,大部分化合物具有较好的抗肿瘤活性。     

1-｛2-[(取代苯基)甲氧基]-2-(取代苯基)乙基｝-1H-三唑和苯并三唑类化合物的合成及抗真菌活性

报道了39个新的1-｛2-[(取代苯基)甲氧基]-2-(取代苯基)乙基｝-1H-三唑和苯并三唑类化合物的合成与体外抑菌试验,结果表明,化合物6,13的抗真菌活性为益康唑的4～10倍,化合物10,12,14,15,20,22,23,28.30和31等对大部分真菌活性也优于或相当于益康唑及克霉唑,化合物23和31抗裴氏着色菌活性为益康唑、克霉唑的30倍以上,化合物22抗白念珠菌活性为益康唑的8倍,克霉唑的4倍。     

N-取代苯基-2-(4-取代苯基)环丙烷-1-甲酸乙酯-1-酰胺的设计、合成及抗肿瘤活性

目的设计、合成N-取代苯基-2-(4-取代苯基)环丙烷-1-甲酸乙酯-1-酰胺类化合物,并进行抗肿瘤活性研究。方法采用微波反应,经缩合、环化、水解以及酰胺化等反应合成目标化合物。所合成化合物经1H NMR谱图和质谱进行确证,并对其进行体外抗肿瘤活性筛选。结果设计、合成了20个环丙烷酰胺类化合物。体外药理活性实验显示,所合成的目标化合物具有较好的抗肿瘤活性,其中5b对A549细胞的IC50值为6.8μM,具有进一步研究的价值。结论对氯苯基取代化合物比对三氟甲基苯基取代化合物有更好的抗肿瘤活性;酰胺芳香环吸电子基团化合物活性优于供电子基团化合物。     

马蹄金素类似物的合成及其初步抗HBV活性研究

目的合成马蹄金素[N-(N-苯甲酰基-L-苯丙氨酰基)-O-乙酰基-L-苯丙氨醇,MTS]的类似物,以期寻找高效低毒的抗乙肝病毒化合物。方法以L-苯丙氨酸为起始原料,通过磺酰化、酰化、水解、烷基化等反应,合成马蹄金素类似物并对其进行体外抗乙肝病毒活性测试。结果合成了7个具有磺酰胺结构片段的马蹄金素类似物,活性测试结果显示所有的目标产物均有不同程度的抗乙肝病毒活性,有3个化合物在8μg·mL-1的浓度下具有较高的抑制率,分别为2b(41.9%)、2d(61.3%)、3(47.5%)。结论其中2d显示出较强的抗HBV活性,在3.2μg·mL-1时抑制率也有50.9%,具有进一步研究开发的价值。     

抗乙肝病毒药物恩替卡韦的合成

目的合成抗乙肝病毒（HBV）药物恩替卡韦。方法以（1S-反式）-2-[（苯甲氧基）甲基]-3-环戊烯-1-醇为起始原料,经环氧化、保护羟基、定向加成、保护氨基、氧化、亚甲基化和两步脱保护基合成目标化合物。结果实验总收率为8.9%,其结构经红外、质谱、氢谱和碳谱测试确证。结论该工艺与文献相比操作简便,易于工业化大生产,收率高。     

The S-acyl-2-thioethyl pronucleotide approach applied to acyclovir: part I. Synthesis and in vitro anti-hepatitis B virus activity of bis(S-acyl-2-thioethyl)phosphotriester derivatives of acyclovir

The synthesis and in vitro anti-hepatitis B virus (HBV) activity of two mononucleoside phosphotriester derivatives of acyclovir incorporating S-acyl-2-thioethyl (SATE) groups are reported. In contrast to the parent nucleoside, the described phosphotriesters emerged as potent and selective inhibitors of HBV replication in HepG2.2.15 cells. This result can be attributed to the unique cellular metabolism of the SATE pronucleotides giving rise to the delivery to acyclovir 5'-monophosphate inside the infected cells. Moreover, the in vitro anti-HBV activities of one of these bis(SATE)phosphotriesters and of (-)-beta-L-2',3'-dideoxy-3'-thiacytidine (lamivudine, 3TC) were compared alone and in combination. Analysis of the combination data indicates that 3TC and the studied SATE pronucleotide of acyclovir exhibited strong synergistic interactions. The present study provides an example where the use of a pronucleotide approach extends the antiviral spectrum of a nucleoside analogue. Given the potency of SATE pronucleotides of acyclovir against HBV in HepG2.2.15 cells, further studies including animal experiments seem warranted to evaluate the potential of these compounds as anti-HBV agents.     

Synthesis and biological evaluation of phenylpropanoid derivatives

In this work, a series of oxime ether phenylpropanoid derivatives were synthesized. Their anti-hepatitis B virus (HBV) activity in HepG 2.2.15 cells was determined, and anti-cancer potential against three human cancer cell lines was evaluated. All the synthesized derivatives showed great efficiency against HBV. Compound 4d demonstrated the most effective anti-HBV activity, performing strong potent inhibitory not only on the secretion of HBsAg (IC₅₀ = 50.45 μM, SI = 9.18) and HBeAg (IC₅₀ = 50.11 μM, SI = 9.24), but also on the HBV DNA replication (IC₅₀ = 51.80 μM, SI = 8.94). Besides, the synthetic compounds also displayed obvious anti-cancer activity. Moreover, the docking study of all synthesized compounds inside the related protein active site was conducted to explore the molecular interactions and a molecular target for activity using a MOE-docking technique. This study identified a new class of potent anti-HBV and anti-cancer agents.     

Synthesis and anti-HIV and anti-HBV activities of 2'-fluoro-2', 3'-unsaturated L-nucleosides

The synthesis of L-nucleoside analogues containing 2'-vinylic fluoride was accomplished by direct condensation method, and their anti-HIV and anti-HBV activities were evaluated in vitro. The key intermediate 8, the sugar moiety of our target compounds, was prepared from 1,2-O-isopropylidene-L-glyceraldehyde via (R)-2-fluorobutenolide intermediate 5 in five steps. Coupling of the acetate 8 with the appropriate heterocycles (silylated uracil, thymine, N4-benzoylcytosine, N4-benzoyl-5-fluorocytosine, 6-chloropurine, and 6-chloro-2-fluoropurine) in the presence of Lewis acid afforded a series of 2'-fluorinated L-nucleoside analogues (15-18, 23-26, 36-45). The newly synthesized compounds were evaluated for their antiviral activities against HIV-1 in human peripheral blood mononuclear (PBM) cells and HBV in 2.2.15 cells. Cytosine 23, 5-fluorocytosine 25, and adenine 36 derivatives exhibited moderate to potent anti-HIV (EC50 0.51, 0.17, and 1.5 microM, respectively) and anti-HBV (EC50 0.18, 0.225, and 1.7 microM, respectively) activities without significant cytotoxicity up to 100 microM in human PBM, Vero, CEM, and HepG2 cells.     

Synthesis and antiviral evaluation of some beta-L-2', 3'-dideoxy-5-chloropyrimidine nucleosides and pronucleotides

The synthesis and in vitro anti human immunodeficiency virus (HIV) and anti-hepatitis B virus (HBV) activities of some unnatural beta-L-nucleoside enantiomers related to the anti-HIV compound 2', 3'-dideoxy-3'-fluoro-5-chlorouridine (beta-D-3'Fdd5ClU) are reported. In contrast to beta-D-3'Fdd5ClU, beta-L-3'Fdd5ClU and the other L-congeners were devoid of significant anti-HIV effects, but beta-L-2',3'-dideoxy-5-chlorocytidine (beta-L-dd5ClC) and beta-L-2', 3'-dideoxy-3'-fluoro-cytidine (beta-L-3'FddC) showed a distinct anti-HBV activity. Three mononucleoside phosphotriester derivatives with S-pivaloyl-2-thioethyl (t-BuSATE) groups as biolabile phosphate protective groups were also synthesized. The bis(t-BuSATE) derivative of beta-D-3'Fdd5ClU retained anti-HIV activity in thymidine kinase deficient (TK(-)) CEM cells.     

马蹄金素衍生物的合成及其抗HBV活性研究

目的对马蹄金素[N-(N-苯甲酰基-L-苯丙氨酰基)-O-乙酰基-L-苯丙氨醇,MTS]进行结构修饰,以期寻找到抗乙肝病毒(HBV)活性更强、毒性更低的马蹄金素衍生物。方法以马蹄金素为先导化合物进行结构优化,合成一系列不同取代基团的马蹄金素衍生物并对其进行抗HBV活性测试。结果合成了马蹄金素衍生物共计9个,经体外活性筛选结果显示有4个衍生物具有抗HBV活性,4a(IC50:24.20μmol·L-1,SI:3.69)、5f(IC50:252.60μmol·L-1,SI:>3.96)、5g(IC50:0.82μmol·L-1,SI:52.57)、5h(IC50:1.44μmol·L-1,SI:59.97)。结论化合物5g和5h显示较强的抗HBV活性,选择指数较高,具有进一步研究开发的价值。     

Anti-hepatitis B virus activity of wogonin in vitro and in vivo

The traditional Chinese medicine Scutellaria radix has been used for thousands of years, mainly for the treatment of inflammatory conditions including hepatitis. The major active constituent, wogonin (WG), isolated from S. radix has attracted increasing scientific attention in recent years due to its potent biological activities. However, pharmacologic studies have primarily been focused on wogonin's anti-inflammatory and anti-cancer activities. In this study, we have investigated wogonin's anti-hepatitis B virus (HBV) activity both in vitro and in vivo. In the human HBV-transfected liver cell line HepG2.2.15, wogonin effectively suppressed the secretion of the HBV antigens with an IC(50) of 4 microg/ml at day 9 for both HBsAg and HBeAg. Consistent with the HBV antigen reduction, wogonin also reduced HBV DNA level in a dose-dependent manner. Duck hepatitis B virus (DHBV) DNA polymerase was dramatically inhibited by wogonin with an IC(50) of 0.57 microg/ml. In DHBV-infected ducks wogonin dosed i.v. once a day for 10 days reduced plasma DHBV DNA level with an ED(50) of 5mg/kg. The in vivo anti-HBV effect of wogonin in ducks was confirmed by Southern blotting of DHBV DNA in the liver. Histopathological evaluation of the liver revealed significant improvement by wogonin. In addition, in human HBV-transgenic mice, wogonin dosed i.v. once a day for 10 days significantly reduced plasma HBsAg level. Immunohistological staining of the liver confirmed the HBsAg reduction by wogonin. In conclusion, our results demonstrate that wogonin possesses potent anti-HBV activity both in vitro and in vivo. Currently, wogonin is under early development as an anti-HBV drug candidate.     

几种海洋类肝素多糖的制备及抗乙肝病毒活性初步研究D

目的　制备具有类肝素结构的海洋硫酸多糖,采用HepG2.2.15细胞模型评价它们的体外抗HBV活性。方法 以聚甘露糖醛酸(PM)、聚古罗糖醛酸(PG)和壳寡糖(COS)、甲壳素(CTN)及羧甲基壳聚糖(CMC)为原料,采用氯磺酸-甲酰胺法制备相应的多糖硫酸酯PMS、PGS、SCOS、SCTN和SCMC,并对其硫酸根含量、分子量等理化性质进行测定。以HepG2.2.15细胞为模型,采用MTT法检测多糖的细胞毒性,采用ELISA法检测培养上清中的HBsAg和HBeAg。结果 几种海洋类肝素多糖在30,60,125,250 μg/mL浓度下,对HepG2.2.15细胞作用9d后,均能明显抑制HBsAg和HBeAg的分泌,其中 PGS和PMS的抗HBV活性优于3种壳聚糖硫酸酯衍生物。结论　不同结构的海洋类肝素多糖对HBV抗原具有不同程度的抑制作用,PGS和PMS在抗HBV方面具有潜在的应用前景。