白杨素Mannich碱衍生物的合成及其抗癌活性

目的设计合成新型白杨素Mannich碱衍生物,并寻求具有抗癌活性的新化合物。方法利用Baker-Venkataraman重排法完成白杨素的全合成,再与甲醛、胺类进行Mannich缩合反应得到目标化合物。采用MTT法,以5-氟尿嘧啶为阳性对照,评价目标化合物对人宫颈癌细胞(Hela)、人肺腺癌细胞(A549)、人胃癌细胞(SGC-901)、人结肠癌细胞(HCT-116)、人白血病细胞(K562)5种肿瘤细胞的抗癌活性。结果与结论合成了10个未见文献报道的新化合物,其结构经1H-NMR、IR和MS确证。体外抗癌活性实验表明,部分化合物显示出较好的抗癌活性。     

白杨素衍生物的合成和晶体结构及与DNA的作用

以白杨素为先导化合物经羟甲基化反应合成中间体5,7-二羟基-6,8-二羟甲基黄酮(1)，进而合成了5,7-二羟基-6,8-二(甲氧基甲基)黄酮(2)，5,7-二羟基-6,8-二(乙氧基甲基)黄酮(3)，5,7-二羟基-6,8-二(丁氧基甲基)黄酮(4)，5,7-二羟基-6,8-二(戊氧基甲基)黄酮(5)和5-羟基-7-甲氧基-6,8-二(乙氧基甲基)黄酮(6)；采用IR，¹H NMR，¹³C NMR和元素分析对1～6进行了表征，同时用X-射线单晶衍射法对6进行了晶体结构测定。利用荧光法分别对1～4与CT-DNA的作用进行了研究，根据Stern-Volmer方程，它们对EB-DNA体系的荧光猝灭常数分别为k_q1=9.71×10³ L·mol^-1，k_q2=2.25×10⁴L·mol^-1，k_q3=1.03×10⁴L·mol^-1和k_q4=7.96×10³ L·mol^-1。1～4与白杨素相比，对DNA更具亲和力，为开发更有效的黄酮类化合物提供了实验依据。     

白杨素Mannich碱衍生物的合成及抗高尿酸血症活性

目的设计并合成新型具有抗高尿酸活性的白杨素Mannich碱衍生物。方法以天然产物白杨素为起始原料,与不同含氟有机物进行胺甲基化反应,合成系列白杨素Mannich碱衍生物。采用氯化硝基四氮唑蓝比色法测定目标化合物在体外对黄嘌呤氧化酶的抑制活性,并研究其在昆明种小鼠的体内抗高尿酸活性。结果与结论合成了10个未见文献报道的新化合物,目标化合物的结构经核磁共振氢谱和碳谱、电子轰击质谱(EI-MS)确证。体外活性实验显示,大多数含氟白杨素衍生物都具有较好的黄嘌呤氧化酶抑制作用,且体内抗高尿酸作用显著,在40 mg·kg~(-1)剂量时白杨素衍生物1a、1b、1c、1e、1f、1i和1j抗高尿酸效果最好,可使昆明种小鼠的血清尿酸值接近正常水平。     

Preparation of new 7-hydroxyguanine derivatives and their biological activities

We prepared new 7-hydroxyguanine derivatives, 7-hydroxyguanosine 5'-monophosphate and N2-tetrahydropyranyl-7-hydroxyguanine, and compared biological activities of 7-hydroxyguanine derivatives including nucleosides acquired previously. 7-Hydroxyguanine and its nucleotide inhibited the focus formation of Rous sarcoma virus. Antitumor activities of these derivatives against mouse leukemia L1210 were not so different from one another. Anti-proliferative activities of the derivatives on various human cell lines were significantly different from one another.     

N-吲哚烷基哌啶类化合物及其类似物的合成和活性研究

摘 要：目的 以5-羟色胺转运体和5-HT2A受体为靶点,设计合成N-吲哚烷基哌啶类化合物及其类似物,研究它们的体内外生物活性。方法 以苯并五元氮杂化合物为原料,经烷基化反应,再与相应的哌啶或哌嗪类化合物进行缩合制备系列化合物。经5-羟色胺再摄取抑制实验和5-HT_2A受体结合实验进行体外筛选,采用小鼠醋酸扭体法和小鼠热板法对其中优选化合物10c、10e进行体内镇痛活性实验;通过阿片受体结合试验和小鼠急性毒性试验,考察目标化合物作为新型非阿片类镇痛剂的潜在开发价值。 结果与结论 共合成了18个未见文献报道的新化合物, 经高分辨质谱及核磁共振氢谱确证结构。体内外药理研究表明：化合物10c和10e具有较强的5-羟色胺再摄取抑制作用,且与5-HT_2A受体有较高亲和力;10c、10e在两种镇痛模型上均显示出很强的镇痛活性;与阿片μ、δ、κ受体无明显亲和力;毒性较小,具有作为非阿片类新型镇痛剂的开发价值。     

Synthesis and reaction of cyanopyridone derivatives and their potential biological activities

4-Carboxy-3-cyano-6-biphenyl-pyrid-2-one (1) was prepared and then allowed to react with methyliodide, benzenesulphonyl chloride, phenylisothiocyanate, acetic anhydride, o-phenylenediamine, phenylmagnesium bromide and phosphorus pentasulphide affording the corresponding N-substituted pyrid-2-one 2-5, 4-(benzimidazol-2-yl)-pyrid-2-one 7, 2-hydroxy-2-phenyl-1,2-dihydro-pyridine 8 and 2-thiopyridone 9 derivatives, respectively. Treatment of 1 with dimethyl sulphate and phosphorus oxychloride to give 2-methoxy pyridine 12 and 2-chloro pyridine 13 derivatives. Reaction of 13 with amines and hydrazine hydrate afforded 14 and 15, respectively. The structural assignments of the new compounds were based on analytical, spectroscopic measurements and chemical reactions. Some of the obtained compounds showed interesting antibacterial and antifungal activities in vitro.     

Synthesis of some N-substituted indole derivatives and their biological activities.

Acylation of 2,3-diphenyl-5-methoxy-indole using ethyl chloroformate or chloroacetyl chloride in dimethylformamide and sodium hydride yielded the N-substituted derivatives 1 and 2, respectively. While Friedel-Crafts acylation using chloroacetyl chloride afforded di-4,6-chloroacetyl derivative 3, the reaction of the N-chloroacetyl derivative 2 with amines, hydrazines, urea, semicarbazide hydrochloride, thiophenol, benzimidazole-2-thiol, thiosemicarbazide, 2-mercaptoethanol and thioglycolic acid was studied. Several of the compounds were tested for their effect on arterial blood pressure, antiinflammatory and ulcerogenic activities.     

白杨素抗肿瘤衍生物的合成及其构效关系

目的合成一系列白杨素衍生物并结合体外实验探讨白杨素衍生物抗肿瘤作用的构效关系。方法以5,7-二羟基黄酮为原料,通过取代、水解、酰胺缩合等化学反应引入一些极性不同的小分子化合物,合成一系列白杨素的衍生物,然后采用MTT比色法检测白杨素及其衍生物对食管癌EC109细胞、肝癌HepG2细胞、宫颈癌Hela细胞的增殖抑制作用。结果化合物Ⅲa、Ⅲb、Ⅲc、Ⅲd、Ⅲf对抑制EC109增殖表现出的抗癌活性较白杨素有明显的提高,化合物Ⅲa、Ⅲd、Ⅲe、Ⅲf对抑制HepG2增殖表现出的抗癌活性较白杨素有明显的提高,其中Ⅲd和Ⅲf的抗肿瘤作用显著;白杨素及其衍生物对抑制Hela细胞的增殖均较高,但其衍生物抗肿瘤作用与白杨素相比没有提高。结论引入极性基团对白杨素的抗肿瘤活性有明显的提高,经过极性基团修饰后的白杨素衍生物能明显提高对EC109、HepG2细胞增殖抑制作用。     

Design,synthesis, and biological evaluation of chrysin derivatives as potential FabH inhibitors

New series of chrysin derivatives ( 4a – 4t ) were designed and synthesized by introducing different substituted piperazines at C‐7 position. Their inhibitory effects on FabH were evaluated using two Gram‐negative bacterial strains, Escherichia coli and Pseudomonas aeruginosa, and two Gram‐positive bacterial strains, Bacillus subtilis and Staphylococcus aureus. To our delight, most of these compounds exhibited a dramatic increase in inhibitory potency, compared with the control positive drugs. Among them, compound 4s exhibited the most potent inhibitory activity with IC₅₀ values of 5.78 ± 0.24 μm inhibiting E. coli FabH and potent antibacterial activity against S. aureus and E. coli with MIC of 1.25 ± 0.01, 1.15 ± 0.12 μg/mL, respectively, comparing to the control positive drugs penicillin G (7.56 ± 0.30 μm ). Docking simulation was performed to position compound 4s into the FabH active site, and the result showed that compound 4s could bind well with the FabH as potent FabH inhibitor.     

新型苯胺类苯并咪唑衍生物的合成及其生物活性

目的 设计合成新型苯胺类苯并眯唑衍生物，并评价其对大白鼠胃液分泌和胃酸分泌的作用。方法 以没食子酸、胡椒醛和香草醛为原料，经多步反应合成目标化合物，并通过大白鼠灌胃给药、幽门结扎、测定胃液及和胃酸量，来确定所合成化合物对其胃液和胃酸分泌率的影响。结果 共合成8个新化合物、5个前体及1个对照药物(NC-1300)，经元素分析，IR，^H-NMR和MS确证其结构；其中2个化合物对胃酸分泌抑制作用与NC-l300相当，所有化合物均对胃液分泌无显著影响。在中间体制备中提出了经取代的邻硝基苯甲醛一步催化氢化制备取代的邻氨基苯甲醇的方法及其选择性N，N-二甲基化法。结论 以没食子酸为原料所合成的NC-1300类似物的胃酸分泌抑制作用与NC-1300相当，是强的质子泵抑制剂。     

奥丙嗪衍生物的合成及其生物活性研究

目的 设计合成一系列NO供体型奥丙嗪，并考察它们的体外NO释放活性与抗炎活性。方法 以奥丙嗪为原料，利用其羧基将奥丙嗪与呋咱环结构或硝酸酯结构偶联起来，得到NO供体型奥丙嗪。结果与结论 合成11个NO供体型奥丙嗪衍生物，其中化合物Ⅰa、Ⅰg和Ⅱa～Ⅱd6个化合物为新化合物，目标化合物的结构经MS和^1H-NMR确认。呋咱环型化合物在体外能有效地释放出NO，大多数化合物仍保持抗炎活性。     

Adamantylpyridines and their biological activities

Translated from Khimiko-farmatsevticheskii Zhurnal, Vol. 24, No. 1, pp. 26–29, January, 1990.     

Synthesis and cytotoxicity of novel chrysin derivatives

A series of chrysin derivatives 8a–8v were prepared and tested in vitro against HCT-116 (human colon cancer cell line), Hela (human cervical carcinoma cell line), DU-145 (human prostate cell line), K562 (human leukemia cell line), and SGC-7901 (human gastric cancer cell line). The chemical structures of these compounds were confirmed by means of MS, IR, ¹H NMR, ¹³C NMR, and elemental analysis. Among these derivatives, 7-(2-(piperazin-1-yl)ethoxy)-5-hydroxy-2-phenyl-4H-chromen-4-one, 8n, had the strongest activity against HCT-116, Hela, DU-145, K562, and SGC-7901 cells. .     

7-去氮腺苷衍生物的合成及生物活性研究

目的 合成7—位炔基修饰的7—去氮腺苷衍生物，并对这些化合物的抗肿瘤活性及对细胞周期的影响进行考察。方法 在Pd(PPh3)4和CuI的催化下，5—碘—7—去氮腺苷与炔烃反应合成目标化合物，用MTT法评价化合物的抗肿瘤活性，用流氏细胞术考察化合物对细胞周期的影响。结果与结论 合成了4种7—去氮腺苷衍生物，这些化合物对肿瘤细胞的生长具有中等强度的抑制活性，化合物3a可使HL—60和KB细胞周期阻断在Gl期并使HL—60细胞产生凋亡，但对KB细胞不产生凋亡。     

1,5-二取代吡唑-3-甲酰胺类新化合物的合成及其生物活性

目的 设计合成新型1,5-二取代吡唑-3-甲酰胺类化合物,并对其抗ALK5活性进行初步评价.方法 以取代的苯乙酮及草酸二甲酯为原料,经多步反应合成目标化合物,用化学发光法检测报告基因表达产物萤火虫萤光素酶活性,计算化合物对ALK5的抑制率.结果与结论 共合成15个未见文献报道的新化合物,其结构经IR、1H-NMR和MS确证.初步生物活性评价结果显示化合物4g具有一定的抗ALK5活性.     

Isatin dimers and their biological activities

Dimerization is a promising strategy to develop novel drug candidates that could extend the biological spectrum, enhance the activity, overcome drug resistance, as well as improve pharmacological, pharmacokinetic, and physicochemical profiles. Isatin dimers possess a broad spectrum of biological properties and the isatin dimer indirubin has already been used in the clinic, revealing the potential of isatin dimers as putative drugs. This review covers the recent advances of isatin dimers as pharmacologically significant scaffolds and the structure–activity relationship to set up the direction for the design and development of isatin dimers with higher efficiency and lower toxicity.