吲哚马来酰亚胺类化合物的合成及其抗肿瘤活性

为寻找具有抗肿瘤活性的新化合物, 设计合成吲哚马来酰亚胺类化合物, 并评价其体外抗肿瘤活性. 以吲哚与2-氯乙酰胺为起始原料, 经取代、缩合等反应合成了单吲哚马来酰亚胺衍生物5a～5t, 以5-硝基吲哚和不同的N-(3-氯丙基)叔胺经取代、还原、缩合等反应得到了双吲哚马来酰亚胺衍生物9a～9f. 共合成了26个未见文献报道的新化合物, 其结构经质谱、元素分析和核磁共振氢谱确证. 采用MTT法, 测试了目标化合物对肿瘤细胞株HL60, ECA-109, A549, SMMC-7721和PC-3的增殖抑制活性, 结果表明部分化合物对所测肿瘤细胞株均显示一定的抑制作用.     

新型N-甲基吲哚类衍生物的设计、合成及抗肿瘤活性研究

本文以吲哚骨架为起点,设计合成了5个含吲哚骨架的新型有机小分子(4a-4e),通过NMR,IR和MS对目标化合物进行了结构表征.采用MTS法测试了目标化合物对SMMC-7721,Hela,MCF-7和HepG2癌细胞的体外抗肿瘤活性.结果表明,部分化合物选择性地作用于一种细胞,显示出较强的抑制肿瘤细胞增殖的活性,值得进一步研究.     

N_(12)-乙基取代吲哚咔唑衍生物的合成及细胞毒活性研究

合成了9个新的N12-乙基取代吲哚咔唑衍生物6~14,其结构经1H NMR、13C NMR和HRESIMS确定.用噻唑蓝(MTT)法测试了衍生物对人肺癌细胞A549、肝癌细胞Hep G-2和宫颈癌细胞Hela的细胞毒活性.用细胞计数试剂盒-8(Cell Counting Kit-8,CCK-8)法测试了衍生物对白血病细胞K562的细胞毒活性.结果显示,化合物7~9对K562的细胞毒活性与阳性对照阿霉素(ADM)相近,半数抑制浓度(IC50)为0.43~0.93μmol/L.化合物8和12对Hela的活性与阳性对照相近,IC50分别为1.23和0.43μmol/L.化合物13的盐酸盐14对所测试的4种肿瘤细胞株均有较强的抑制活性,IC50值在0.23~1.72μmol/L之间,可作为抗肿瘤先导化合物进行深入研究.     

基于薯蓣皂苷元催化合成N-甲基吲哚孕烯醇酮化合物及其抗肿瘤活性

利用N-甲基吲哚对类固醇药物的前驱体16-脱氢孕烯醇酮乙酸酯(16-DPA)的D环C16位进行修饰,采用ZrCl₄-乙酸乙酯廉价催化体系,合成了16个3β-乙酰氧基-16α-3’-吲哚孕烯醇酮化合物和6个3β-羟基-16α-3’-吲哚孕烯醇酮衍生物.该方法具有收率高、立体选择性好和底物适应性强等优点.通过噻唑蓝(MTT)比色法测试了22个化合物对三阴性乳腺癌细胞(MDA-MB-231)的抗肿瘤活性.初步测试结果表明, 3β-乙酰氧基-16α-3’-吲哚孕烯醇酮化合物6h和6i对MDA-MB-231癌细胞有较好的抑制活性,其半数抑制浓度(IC₅₀)分别为18.07和23.22μmol/L;而化合物7a～7f均对MDA-MB-231癌细胞有较好的抑制活性,其中化合物7e的抗肿瘤活性最好,其IC₅₀为12.50μmol/L.目标化合物为药物筛选提供了一定的参考.     

2,5-二取代吲哚衍生物的合成及抗增殖活性研究

以对硝基苯肼为起始原料,采用费舍尔吲哚合成法合成中间体5-硝基吲哚-2-羧酸酯(3),经还原合成5-氨基吲哚-2-羧酸酯(4),再与4-甲氧基-2-甲苯基异氰酸酯合成脲(5),(5)在水合肼作用下5-(3-(4-甲氧基-2-甲苯基)脲基)-1H-吲哚-2-碳酰肼(6),化合物6和取代醛反应,合成了6个2,5-二取代吲哚衍生物(7a～7f),其结构经~1HNMR,~(13)CNMR和HR-MS表征。采用MTT法研究了7a～7f对人肺癌细胞(A549)和人肝癌细胞(HepG-2)的体外抗增殖活性。结果显示:7d体外抑制活性最优,其IC_(50)分别为10.35μmol·L~(-1)、12.60μmol·L~(-1)。     

2,5-二取代吲哚碳酰肼衍生物的合成及活性研究

以对硝基苯肼为起始原料,采用费舍尔吲哚合成法合成中间体5-硝基吲哚-2-羧酸酯(3),经还原合成5-氨基吲哚-2-羧酸酯(4),再与氯甲酸苯酯合成酰胺(5),5在水合肼作用下形成2,5-碳酰肼吲哚(6),化合物6和取代醛反应,合成了7个2,5-二取代吲哚碳酰肼衍生物(7a～7g)。目标化合物经~1HNMR、~(13)CNMR、HR-MS结构确证。采用MTT法研究了目标化合物的细胞毒活性。结果显示,目标化合物对所选肿瘤细胞的增殖活性具有一定抑制作用。其中7c对宫颈癌细胞(Hela)、乳腺癌细胞(MCF-7)和人肝癌细胞(HepG-2)的抑制活性与阳性药顺铂活性相近。     

新型螺环吡咯酮双氧化吲哚类化合物的无催化剂合成及其抗白血病活性

以3-异硫氰基氧化吲哚与3-丙二腈缩合的3-烯氧化吲哚为原料,乙腈为溶剂,在无催化剂存在的条件下于室温发生[3+2]环加成反应,合成了6个新型的螺环吡咯酮双氧化吲哚类化合物(3a~3f),产率91%~95%,dr 17/1~>20/1,其结构经¹H NMR, ¹³C NMR和HR-MS（ESI-TOF）表征。采用MTT法研究了3a~3f对人白血病细胞(K562)的体外抗肿瘤活性。结果表明：化合物3c对K562具有明显的抑制活性（IC₅₀为36.3 μM）,与阳性对照药顺铂接近。     

1-(3-吲哚基)-3-芳基-2-丙烯-1-酮肟醚的合成及抑菌活性

为寻找具有优良杀菌活性的吲哚衍生物,以吲哚等为原料利用Vilsmeier反应制得3-乙酰吲哚,然后经过羟醛缩合、加成-消除反应合成了一系列新型含吲哚环的2-丙烯-1-酮肟醚3a～3j,其结构通过IR,1H NMR,ESI-MS和元素分析确证.用生长速率法测试了目标化合物对番茄灰霉菌和西瓜炭疽菌的离体抑菌活性,结果表明化合物对两种病原菌有一定的抑制活性,其中3f和3g对番茄灰霉菌抑制活性较高,在浓度为100μg/mL时抑制率分别为81%和74%.     

2-(1H-吲哚-3-基)-5-砜基噁二唑衍生物的合成及其生物活性研究

以吲哚-3-甲酸甲酯为原料,通过肼解、环合生成5-(1H-吲哚3-基)-1,3,4-噁二唑-2-硫醇,再对其进行亲核取代和氧化反应得到目标化合物,并通过¹H NMR、¹³C NMR和HRMS确认其结构。采用噻唑蓝(MTT)法测试了目标化合物对几种癌细胞的体外抑制活性,同时采用比浊法对几种植物病原菌进行了体外抑菌活性测试。结果表明,化合物对于A549(人肺癌细胞)、PC-3(人前列腺癌细胞)、K562(人慢性髓原白血病细胞)和HepG2(人肝癌细胞)四种癌细胞有一定的抑制活性;对水稻白叶枯病菌(Xanthomonas oryzae pv.oryzae,Xoo)、柑橘溃疡病菌(Xanthomonas axonopodis pv.citri,Xac)以及猕猴桃溃疡病菌(Pseudomonas syringae pv.actinidiae,Psa)三种植物病菌同样具有一定的抑菌活性。其中,化合物4f对Xoo的体外抑制率可达87.09%(100μg/mL)和54.02%(50μg/mL)。本文结果可为具有砜结构的吲哚衍生物的合成及应用研究提供参考。     

基于龙胆苦苷的二吲哚甲烷类拟单萜吲哚生物碱类似物合成及其抗肿瘤、逆转紫杉醇耐药活性研究

以环烯醚萜类化合物龙胆苦苷为合成模块,利用拟单萜吲哚生物碱的仿生合成途径和组合化学的研究思路,与色胺类衍生物(吲哚结构的活性单元片段)通过缩合反应,首次合成了23个二吲哚甲烷类拟单萜吲哚生物碱类似物。利用核磁共振波谱(NMR)和高分辨质谱(HRMS)等谱学手段对合成化合物的结构进行了表征,并初步评价了其抗肿瘤活性和逆转耐药活性。活性结果表明,化合物4i脱掉糖基保护基后的化合物5i对3种肿瘤细胞系(TE-1,CAL-62和FaDu)的抑制作用强于阳性对照盐酸阿霉素(Dox)。通过与紫杉醇的联合用药,发现部分化合物如4m、4n、4o、4r等能够有效降低人肺癌细胞紫杉醇耐药株A549/Taxol对紫杉醇的耐药性,具有良好的逆转耐药潜力。     

Synthesis and biological evaluation of new 4beta-5-Fu-substituted 4'-demethylepipodophyllotoxin derivatives

A series of new 4beta-5-Fu-substituted 4'-demethylepipodophyllotoxin derivatives were synthesized and evaluated, together with some previously prepared ones, for their cytotoxic activities against four tumor cell lines (HL60, P388, A549 and BEL7402). Three of these compounds exhibited superior in vitro anticancer activity against P388 and A549 than the reference compound etoposide. In addition, the partition coefficients (P) of all the new and previously synthesized derivatives were determined.     

汉防己甲素衍生物的合成及其生物活性

为寻找更为有效的抗肿瘤药物,改善汉防己甲素的抗肿瘤活性,本文以汉防己甲素为原料,经过Suzuki反应设计并合成了6个新的双苄基异喹啉类衍生物。新化合物经过质谱(MS)、核磁共振氢谱(~1H NMR)、核磁共振碳谱(~(13)C NMR)等技术手段进行了结构确证。采用细胞计数试剂盒(CCK-8)法初步评价了6个新化合物对人肺癌细胞(A549)和小鼠白血病细胞(P388)的抗肿瘤活性。结果表明,化合物均有不同程度的抗肿瘤活性,其中化合物H1、H4、H6对A549细胞的抗肿瘤活性(IC5010μmol/L)明显优于阳性对照汉防己甲素。     

Synthesis and antitumor activity of fused quinoline derivatives. II. Novel 4- and 7-hydroxyindolo-[3,2-b]quinolines.

Novel indolo[3,2-b]quinoline derivatives (1c--f), which carried a methoxy or a hydroxy group at the 4- or 7-position of the lead compound 1a, were prepared and their antitumor activities against P388 in mice were examined. Except for the 4-hydroxy derivative (1d), these showed remarkably potent activity. Among these compounds, the 7-hydroxy derivative (1f) was the most potent one (optimal dose = 50 mg/kg, the median survival time of treated group/control group (T/C) greater than 330%, cure = 5/6).     

Isoquino[4,5-bc]acridines: design, synthesis and evaluation of DNA binding, anti-tumor and DNA photo-damaging ability

Several novel isoquino[4,5-bc]acridine derivatives have been designed and synthesized. Their DNA-binding, anti-tumor and DNA-photo-damaging properties were investigated. A4 exhibited the highest anti-tumor activities against both A 549 (human lung cancer cell) and P388 (murine leukemia cells). All these compounds were found to be more cytotoxic against P388 than against A549. Under 365-nm light irradiation, A3 damaged plasmid DNA pBR322 at <2 microM and cleaved DNA from form I to 100% form II by 50 microM. The mechanism studies revealed that A3 damaged DNA by electron transfer mechanism and singlet oxygen species.     

Synthesis,Characterization and in vitro Antitumour Activity of the Di—n—butyltin（IV） Complexes of Some Arylhydroxamates

Fourteen new di-n-butyltin(IV)complexes of hydroxamic acids of the formula Bu2SnL2(HL-hydroxamic acids)were synthesized by the reaction of Bu2SnO and hydroxamic acids in dry toluene and ethanol media.The compounds were characterized by elemental analyses,molecular weight,IR and 1H NMR spectoscopy.The results indicate that n-Bu2SnL2 have distorted trans-octahedral structure.The antitumor activity in vitro against human A-549 tumor cells and P388 leukemia was presented,and their structure-activity relationship was discussed.     

Synthesis and antitumor activity of a novel water soluble mitomycin analog; 7-N-[2-[[2-(gamma-L-glutamylamino)ethyl]dithio]ethyl]mitomycin C

Introducing the mercaptoethyl group at the 7-N position of mitomycin C 1 has led to the isolation of 7-N,7'-N'-dithiodiethylenedimitomycin C 2. The compound 2 showed excellent antitumor activity against sarcoma 180 (sc-ip) and leukemia P388 (ip-ip) in mice. As an extension of this study, we synthesized mitomycin dimers with symmetrical disulfide and mitomycin derivatives with unsymmetrical disulfide at the 7-N side chain. Among these compounds, the water soluble conjugate 3 with ethyl gamma-L-glutamyl-L-cysteinylglycinate was far more effective against sarcoma 180 and leukemia P388 than 1. During the subsequent stage of inquiry for the potent congeners of 3, the compound 4 (water solubility: greater than 500 mg/ml), designated as KW2149, with the gamma-L-glutamylcystamino group at the 7th position was finally selected for further evaluation.     

南中国海星骨海绵Stelletta sp.中的三萜化合物

最近,我们又从采自广西涠洲岛海域的星骨海绵Stelletta sp.中分离得到3个黄色三萜色素1,2和3(见下式).通过IR,UV,MS和1D NMR,2D NMR等方法测定了它们的结构,并对化合物1的所有C和H进行了指认.同时,通过X射线单晶衍射分析测定了化合物1的立体化学结构.初步的药理实验表明,这3个化合物对P388肿瘤细胞均有很强的抑制活性,ED₅₀值依次为0.01,0.5和1.0μg/mL,提示Stelletta属海绵中的这类三萜具有很好的药用开发前景.     

A New Nortriterpene from the Root of Celastrus hypoleucus

A new nortriterpene, 2‐hydroxy‐3‐methyl‐21‐oxo‐12,24‐dinor‐D : B‐friedooleana‐1,3,5(10),7‐tetraen‐29‐oic acid ( 1 ), was isolated from the root of Celastrus hypoleucus, together with the two known compounds, celastorol ( 2 ) and pristimerine ( 3 ). Their structures were elucidated on the basis of spectroscopic analyses. Compounds 1 – 3 exhibited in vitro significant antioxidant (against lipid peroxidation; by the TBARS method) and antitumor activities (against cancer cell lines P‐388, A‐549, HL‐60, and BEL‐7402).     

New Eunicellin Diterpenes and 9,10‐Secosteroids from the Gorgonian Muricella sibogae

Bioactivity‐guided isolation of the rare gorgonian Muricella sibogae (Nutting ) yielded the two new eunicellin diterpenes sibogin A and B ( 1 and 2 ), the three new 9,10‐secosteroids sibogol A–C ( 6 – 8 ), together with the three known eunicellin diterpenes 3 – 5 and the five known 9,10‐secosteroids 9 – 13 . Their structures were established by extensive spectral analysis (1D‐ and 2D‐NMR, IR, and MS). The cytotoxicity of the isolates 1 – 13 was evaluated in vitro against the selected tumor cell lines P388 and BEL‐7402. All the compounds showed only weak activity against P388 cell lines, with an inhibition rate ranging from 10 to 60% at a concentration of 50 μg/ml, whereas the were inactive against BEL‐7402 cell lines.     

Cytotoxic Constituents from the Stem Bark of Zanthoxylum Pistaciiflorum

Two new esters, methyl 4‐(prenyloxy)dihydrocinnamate and methyl 4‐(geranyloxy)dihydrocinnamate, together with fourteen known compounds have been isolated from the stem bark of Zanthoxylum pistaciiflorum. The structures of two new compounds were determined through spectral analyses. Among the isolates, four compounds exhibited effective cytotoxicities against P‐388 and HT‐29 cell lines in vitro.