新型7-甲基-5,6,7,8-四氢-3H-吡啶并[4',3'∶4,5]噻吩并[2,3-d]嘧啶酮类Schiff碱的合成及抗肿瘤活性研究

以1-甲基-4-哌啶酮为原料,经过Gewald、成环、缩合等反应合成了14个新型7-甲基-5,6,7,8-四氢-3H-吡啶并[4′,3′∶4,5]噻吩并[2,3-d]嘧啶酮类Schiff碱,其结构经~1HNMR和MS进行确证。初步的生物活性结果表明,目标化合物对荷尔蒙依赖型乳腺癌细胞MCF-7和三阴性乳腺癌细胞MDA-MB-231均有抑制活性,半数抑制浓度(IC_(50))值均达到微摩尔级,其中部分化合物的抗肿瘤活性甚至强于阳性药物5-氟尿嘧啶(5-FU)和他莫昔芬。尤其是3-(二茂铁亚胺基)-7-甲基-5,6,7,8-四氢-3H-吡啶并[4′,3′∶4,5]噻吩并[2,3-d]嘧啶-4-酮对MCF-7和MDA-MB-231这两种乳腺癌细胞均展现出了最强的抑制活性,其IC_(50)分别为10.5、7.1μmol/L;此外,目标化合物对正常的MCF-10A细胞没有毒性,而5-氟尿嘧啶和他莫昔芬有毒性。     

新型四氢吡啶并[4,3-d]嘧啶化合物的合成及生物活性

[目的]为寻找具有较高生物活性的四氢吡啶并[4,3-d]嘧啶类农药先导化合物.[方法]以4-哌啶酮-3-羧酸乙酯盐酸盐和2,4-二氯嘧啶为初始原料,采用微波辅助技术,经3步反应,合成了16个四氢吡啶并[4,3-d]嘧啶化合物Va1～Vd4,其结构经1H NMR、元素分析及高分辨质谱确证且进行杀菌活性测定.[结果]目标化...     

2-取代-7-苄氧基-4,5-二氢-[1,2,4]三氮唑[4,3-a]喹啉-1(2H)-酮的合成及其抗癫痫活性研究

为了寻找具有更好抗惊厥活性及低神经毒性的化合物,文章以6-羟基-3,4-二氢-2(1H)-喹啉酮为起始原料合成了4个2-取代-7-苄氧基-4,5-二氢-[1,2,4]三氮唑[4,3-a]喹啉-1(2H)-酮衍生物,对目标化合物,采用小鼠最大电惊厥实验(MES),皮下戊四唑实验(sc-PTZ)测定了其抗惊厥活性,采用旋转法测定了神经毒性.药理实验结果显示目标化合物表现出了较强的抗惊厥话性,该结论证明喹啉并三氮唑化合物具有被开发为新型癫痫治疗药的优良品质.     

（3aS,6aR）-1,3-二苄基-四氢-4H-噻吩并[3,4-d]咪唑-2,4-二酮（1H）制备工艺优化

d-生物素的重要中间体：（3aS,6aR）-1,3-二苄基-四氢-4H-噻吩并[3,4-d]咪唑-2,4-二酮（1H）（以下简称硫代内酯）由（3aS,6aR）-1,3-二苄基-四氢-4H-呋喃并[3,4-d]咪唑-2,4-二酮（1H）（以下简称内酯）中呋喃环上的氧用硫取代而成。目前常用的硫代工艺均有一些明显的弊端,本文对硫代工艺进行改进,可以提高硫代反应的收率和产物的质量。     

6,7-二氢-6-甲基-3-甲硫基吡喃[4,3-c]吡唑-4-(2H)-酮衍生物的合成及生物活性

6-甲基-5,6-二氢吡喃-2,4-二酮和二硫化碳、碘甲烷缩合得到5,6-二氢吡喃-2,4-二酮的二硫缩醛化合物,然后和取代肼反应得到1位取代和2位取代6,7-二氢-6-甲基-3-甲硫基吡喃[4,3-c]吡唑-4-(2H)-酮衍生物。其化学结构通过单晶X衍射、1HNMR、13CNMR、元素分析证实。生物活性测试结果初步表明,该类化合物表现出一定的杀菌和对前列腺癌细胞PC3的抑制活性。     

噻吩并[2,3-d]嘧啶类衍生物的合成及抗肿瘤活性

以2-丁酮、丙二腈和单质硫为原料，通过改良的Gewald反应合成2-氨基-3-氰基-4,5-二甲基噻吩，再与三氯氧磷和三氟乙酸反应“一锅法”合成关键中间体5,6-二甲基-2-三氟甲基-4-氯噻吩并[2,3-d]嘧啶，最后与取代苄胺发生取代反应制得16种噻吩并[2,3-d]嘧啶类含氟衍生物IIIa～IIIp。通过1HNMR、13CNMR、IR、MS和元素分析对目标化合物进行了表征，并经X射线单晶衍射测定了化合物IIIa的晶体结构。体外抗肿瘤活性结果表明，目标化合物IIIa、IIIc和IIIf表现出良好的抗肿瘤活性，苯环上被供电子基取代时目标化合物IIIk～IIIp的抗肿瘤活性均较差，苯环间位被吸电子基取代时活性较好（如IIIc、IIIf和IIIi），尤其是间位被氟原子取代时活性明显提高。化合物IIIa对MCF-7和HepG2细胞的半数抑制浓度（IC50）分别为2.01、2.44 μmol/L，IIIc对MCF-7和HepG2细胞的IC50分别为1.44、1.47 μmol/L，二者的活性均远优于对照组吉非替尼（Gefitinib）。     

茶碱并四唑类衍生物的设计合成以及抗惊厥活性的研究

寻找高效的潜在抗癫痫药物,设计合成系列目标化合物并测定其抗惊厥活性。以8-氯茶碱为起始原料,经取代、肼代和环合3步反应合成目标化合物,并采用最大电惊厥法对所合成化合物进行抗惊厥活性的测定。所有合成化合物结构经~1HNMR和~(13)CNMR进行确证。其中,4-正壬烷-6,8-二甲基-4H-苯并[4,5]咪唑并[1,2-d]四唑-5,7(6H,8H)-二酮的抗惊厥活性最强,其ED50为22.38 mg/kg,具有潜在的抗癫痫活性。     

2-取代-7-苄氧基-4，5-二氢-[1，2,4]-氮唑[4，3-a]喹啉-1（2H）-酮的合成及其抗癫痫活性研究

为了寻找具有更好抗惊厥活性及低神经毒性的化合物,文章以6-羟基-3,4-二氢-2（1忉-喹啉酮为起始原料合成了4个2-取代-7-苄氧基-4,5-二氢-[1,2,4】三氮唑[4,3-a】喹啉-1（2H）-酮衍生物,对目标化合物,采用小鼠最大电惊厥实验（MES）,皮下戊四唑实验（sc-PTZ）测定了其抗惊厥活性,采尉旋转法测定了神经毒性。药理实验结果显示目标化合物表现出了较强的抗惊厥活性,该结论证明喹啉并三氮唑化合物具有被开发为新型癫痫治疗药的优良品质。     

西地那非4-哌嗪位丁酸修饰衍生物的合成

从原料5-(2-乙氧苯基)-1-甲基-3-丙基-1,6-二氢-7 H-吡唑并[4,3-d]嘧啶-7-酮开始,合成了西地那非4-哌嗪位丁酸修饰衍生物5-(2-乙氧基-5-(4-(3-羟羧基丙基)哌嗪基磺酰基)苯基)-1-甲基-3-丙基-1,6-二氢-7 H-吡唑并[4,3-d]嘧啶-7-酮,核磁、质谱、红外验证了其分子结构,高效液相检测纯度97.78%,总收率74.0%。     

环保型抑菌剂5,6,7,8-四氢-1,2,4-三唑并[4,2-a]吡嗪的合成

[目的]为寻找具有较高生物活性的5,6,7,8-四氢-1,2,4-三唑并[4,3-a]吡嗪类环保抑菌剂.[方法]以吡啶-2-甲酸、2-哌嗪酮以及取代苯甲酸为初始原料,经5步反应,合成了 3个5,6,7,8-四氢-1,2,4-三唑并[4,3-a]吡嗪化合物8a～8c,其结构经1H NMR、元素分析及高分辨质谱确证且进行抑...     

乙酰胺基丙酰胺衍生物的合成及抗癌活性研究

以L-苯丙氨酸或L-色氨酸为基本骨架,甲酯化后与4-取代苯乙酸酰胺化,经水解与2-(1H-咪唑-1-基)乙胺反应得到六个新型2-(4-取代苯乙酰胺基)丙酰胺衍生物5a～5f。化合物结构通过IR、1H NMR和元素分析进行确证。通过MTT法测试了目标化合物对人非小细胞肺癌细胞A-549的抑制活性。初步抗癌活性测试表明,化合物5e具有明显的抑制肿瘤细胞增殖活性。     

Novel Pyrimidine Derivatives as Potential Anticancer Agents: Synthesis,Biological Evaluation and Molecular Docking Study

In the present paper, new pyrimidine derivatives were designed, synthesized and analyzed in terms of their anticancer properties. The tested compounds were evaluated in vitro for their antitumor activity. The cytotoxic effect on normal human dermal fibroblasts (NHDF) was also determined. According to the results, all the tested compounds exhibited inhibitory activity on the proliferation of all lines of cancer cells (colon adenocarcinoma (LoVo), resistant colon adenocarcinoma (LoVo/DX), breast cancer (MCF-7), lung cancer (A549), cervical cancer (HeLa), human leukemic lymphoblasts (CCRF-CEM) and human monocytic (THP-1)). In particular, their feature stronger influence on the activity of P-glycoprotein of cell cultures resistant to doxorubicin than doxorubicin. Tested compounds have more lipophilic character than doxorubicin, which determines their affinity for the molecular target and passive transport through biological membranes. Moreover, the inhibitory potential against topoisomerase II and DNA intercalating properties of synthesized compounds were analyzed via molecular docking.     

新型嘧啶类化合物的合成及抗肿瘤活性

基于已报道的ALK激酶抑制剂，对NVP-TAE684进行结构改造，将起始化合物1经过胺化引入吡嗪氮杂环（2），再脱Boc反应获得胺中间体（3），最后3与亲电试剂6通过钯催化C-N偶联反应合成了2个吡嗪氮杂环修饰的嘧啶衍生物（7a，7b）。中间体2，3和目标化合物7未见文献报导，6个新化合物结构均经¹H NMR、¹³C NMR和HRMS-ESI确定。采用MTT法考察了目标化合物对肿瘤细胞NCI-H460和NCI-H520的体外抑制活性。结果表明，化合物7a和7b对肿瘤细胞均具有明显的抑制活性，其中7a的抑制活性IC₅₀=52.10（±0.10） nM。     

3-乙酰基香豆素肟衍生物的合成及抗肿瘤活性

以水杨醛为起始原料,经Knoevenagel反应得到3-乙酰基香豆素,将其酮羰基与盐酸羟胺反应得到肟,利用肟羟基与不同碳数的二溴烷烃反应得到相应的溴代肟醚,再与硝酸银反应得到5个3-乙酰基香豆素肟硝酸酯杂合物.目标化合物的结构经红外光谱、核磁共振氢谱和质谱确证.用检测灵敏度高的CCK-8法评价了目标化合物对人肝癌Hep...     

Synthesis of New Biscoumarin Derivatives,In Vitro Cholinesterase Inhibition,Molecular Modelling and Antiproliferative Effect in A549 Human Lung Carcinoma Cells

A series of novel C4-C7-tethered biscoumarin derivatives (12a–e) linked through piperazine moiety was designed, synthesized, and evaluated biological/therapeutic potential. Biscoumarin 12d was found to be the most effective inhibitor of both acetylcholinesterase (AChE, IC₅₀ = 6.30 µM) and butyrylcholinesterase (BChE, IC₅₀ = 49 µM). Detailed molecular modelling studies compared the accommodation of ensaculin (well-established coumarin derivative tested in phase I of clinical trials) and 12d in the human recombinant AChE (hAChE) active site. The ability of novel compounds to cross the blood–brain barrier (BBB) was predicted with a positive outcome for compound 12e. The antiproliferative effects of newly synthesized biscoumarin derivatives were tested in vitro on human lung carcinoma cell line (A549) and normal colon fibroblast cell line (CCD-18Co). The effect of derivatives on cell proliferation was evaluated by MTT assay, quantification of cell numbers and viability, colony-forming assay, analysis of cell cycle distribution and mitotic activity. Intracellular localization of used derivatives in A549 cells was confirmed by confocal microscopy. Derivatives 12d and 12e showed significant antiproliferative activity in A549 cancer cells without a significant effect on normal CCD-18Co cells. The inhibition of hAChE/human recombinant BChE (hBChE), the antiproliferative activity on cancer cells, and the ability to cross the BBB suggest the high potential of biscoumarin derivatives. Beside the treatment of cancer, 12e might be applicable against disorders such as schizophrenia, and 12d could serve future development as therapeutic agents in the prevention and/or treatment of Alzheimer’s disease.     

含亚胺结构片段的喹唑啉酮衍生物的合成与抗肿瘤活性研究

设计并合成了一系列含亚胺结构片段的新型喹唑啉酮衍生物,最终的15个化合物结构经¹HNMR、¹³CNMR和HR-MS确证,并评价了它们对野生型表皮生长因子受体酪氨酸激酶(EGFR^wt)和两种人癌细胞株(A549、HepG2)的体外抗肿瘤活性。结果表明,部分化合物具有良好的活性,特别是化合物(E)-2-((4-((3,4-二氟亚苄基)氨基)苯氧基)甲基)-3-甲基喹唑啉-4(3 H)-酮对EGFR^wt激酶的IC₅₀达到0.037μmol/L,对A549和HepG2两种肿瘤细胞的IC₅₀值优于吉非替尼。     

Chiral salicyl diamines: potent anticancer molecules

A set of 12 enantiomeric diamine-based small molecules was synthesized and screened for anticancer activity against five human cancer cell lines: NCI-H460, A549, MCF-7, SK-BR-3, and T-47D. The salicyl diamino compounds (1-6) were found to induce inhibition of the growth of cancer cells at submicromolar concentrations. The lead compound, N,N'-bis-salicyl-(1R,2R)-diaminocyclohexane (1) displayed single-reagent anticancer activity with an IC(50) value equal to or less than 2.0 microM in H460 and A-549 cancer cells. SRB and colony formation assays indicated that compound 1 shows greater cytotoxic activity toward MCF-7 cells than MCF-10A cells. Real-time RT-PCR analysis demonstrated that compound 1, is an extremely efficient regulator of antiapoptotic genes, Bcl-xL, Bcl-2, and the cell cycle related gene, cyclin D1. This study provides a new insight into the development of novel small molecules in the treatment of human breast cancers.     

One-Pot Synthesis and Antiproliferative Activity of Highly Functionalized Pyrazole Derivatives

A series of highly functionalized pyrazole derivatives has been prepared by a one-pot, versatile and regioselective procedure. Pyrazoles 1 – 29 were tested in cell-based assay to assess their antiproliferative activity against a panel of tumour cells. Additionally, the cytotoxicity of prepared compounds was evaluated against normal human fibroblasts. The antiproliferative activity of the synthesized molecules emerged to be affected by the nature of the substituents of the pyrazole scaffold and derivatives 21 – 23 proved to inhibit the growth of melanoma and cervical cancer cells. Compound 23 was identified as the most active derivative and docking simulations predicted its ability to interact with estrogen receptors.     

2-芳醛腙噻唑类化合物的合成及其抗肿瘤活性

噻唑环和腙键结构均具有一定的生物活性,采用活性结构拼接法,将噻唑环与腙键相结合,设计并合成了16个2-芳醛腙噻唑类化合物,并采用MTT法对目标化合物进行体外抗肿瘤活性筛选。测试结果表明,该类新化合物对乳腺癌细胞株(MDA-MB-231、MDA-MB-468、MCF-7)具有一定的抗增殖活性。其中,N-(2-吡啶)甲醛-2-(4-苯基)噻唑腙的抗增殖活性最好,其IC50值分别为(0.21±0.11)、(0.18±0.10)、(0.17±0.08)μmol/L;而该化合物对其他肿瘤细胞亦具有一定的抗增殖活性,且相对乳腺癌细胞株的生物活性均在10倍及以上,说明其对乳腺癌细胞具有较好的生物活性和选择性,且毒副作用小,值得作为抗乳腺癌先导化合物进行进一步研究。     

Design,Synthesis, and Biological Evaluation of Unconventional Aminopyrimidine,Aminopurine, and Amino‐1,3,5‐triazine Methyloxynucleosides

Herein we describe a class of unconventional nucleosides (methyloxynucleosides) that combine unconventional nucleobases such as substituted aminopyrimidines, aminopurines, or aminotriazines with unusual sugars in their structures. The allitollyl or altritollyl derivatives were pursued as ribonucleoside mimics, whereas the tetrahydrofuran analogues were pursued as their dideoxynucleoside analogues. The compounds showed poor, if any, activity against a broad range of RNA and DNA viruses, including human immunodeficiency virus (HIV). This inactivity may be due to lack of an efficient metabolic conversion into their corresponding 5′‐triphosphates and poor affinity for their target enzymes (DNA/RNA polymerases). Several compounds showed cytostatic activity against proliferating human CD4⁺ T‐lymphocyte CEM cells and against several other tumor cell lines, including murine leukemia L1210 and human prostate PC3, kidney CAKI‐1, and cervical carcinoma HeLa cells. A few compounds were inhibitory to Moloney murine sarcoma virus (MSV) in C3H/3T3 cell cultures, with the 2,6‐diaminotri‐O‐benzyl‐D ‐allitolyl‐ and ‐D ‐altritolyl pyrimidine analogues being the most potent among them. This series of unconventional nucleosides may represent a novel family of potential antiproliferative agents.