噻唑并[3,2-b][1,2,4]三唑酮衍生物的合成及抗癌活性研究

以3,4,5-三甲氧基苯甲酸为原料,经过Claisen缩合等反应设计合成一系列新的噻唑并[3,2-b][1,2,4]三唑-6-酮稠杂环衍生物并测定其体外抗肿瘤活性。目标化合物经~1HNMR、~(13)CNMR和高分辨质谱等表征后,在He La、HCT116、BEL-7402及L-02细胞中用MTT法测定其抑制细胞增殖的程度,并初步判断化合物的体外抗癌活性。结果表明,与临床常用药顺铂(DDP)相比,多数化合物具有抑制肿瘤细胞增殖活性。其中,5-(4-苄氧基苯亚甲基)-2-(3,4,5-三甲氧基苯基)噻唑并[3,2-b][1,2,4]三唑-6(5H)-酮、5-(4-乙酰氧基苯亚甲基)-2-(3,4,5-三甲氧基苯基)噻唑并[3,2-b][1,2,4]三唑-6(5H)-酮、5-(α-呋喃亚甲基)-2-(3,4,5-三甲氧基苯基)噻唑并[3,2-b][1,2,4]三唑-6(5H)-酮和5-(α-噻吩亚甲基)-2-(3,4,5-三甲氧基苯基)噻唑并[3,2-b][1,2,4]三唑-6(5H)-酮对HCT116等3种癌细胞的抑制率高于正常细胞L-02,且对癌细胞有选择性抑制作用,而对正常细胞无毒性,具有良好的后续研究价值。5-(4-氟苯亚甲基)-2-(3,4,5-三羟苯基)噻唑并[3,2-b][1,2,4]三唑-6(5H)-酮对BEL-7402等细胞的抑制率有大幅度提高,但对L-02正常细胞的毒性更大。     

新型Combretastatin A-4衍生物的合成及生物活性研究

Combretastatin A-4是一类结构独特的天然产物,具有较好的抗肿瘤活性。为了进一步研究该类化合物的构效关系,以3,4,5-三甲氧基苯甲醛和3-羟基-4-甲氧基苯乙酸为原料,在碱性条件下经缩合、酰化反应合成了5个未见文献报道的Combretastatin A-4衍生物。并通过~1HNMR、~(13)CNMR和MS对其结构进行确证。采用MTT法对合成的目标产物体外抗肿瘤活性进行了初步测定。结果表明,(E)-N-(2-(二甲氨基)乙基)-2-(3-羟基-4-甲氧基苯基)-3-(3,4,5-三甲氧基苯基)丙烯酰胺和(E)-2-(3-羟基-4-甲氧基苯基)-N-(2-(吡咯烷-1-基)乙基)-3-(3,4,5-三甲氧基苯基)丙烯酰胺对K562肿瘤细胞有较弱的抑制作用。     

一种SGLT1/2抑制剂的合成工艺

阐述了一种SGLT1/2抑制剂1,6-脱水-1-C-[4-氯-3-[(4-三氟甲氧基苯基)甲基]苯基]-5-C-(羟甲基)-β-L-艾杜吡喃糖(1)的合成方法。该方法以[(3S,4S,5R,6S)-3,4,5-三苄氧基-6-[4-氯-3-[[4-(三氟甲氧基)苯基]甲基]苯基]-2-羟甲基-6-甲氧基-四氢吡喃-2-基]甲醇(2)为原料,经过成环反应得到[(1R,2S,3S,4R,5R)-2,3,4-三苄氧基-5-[4-氯-3-[[4-(三氟甲氧基)苯基]甲基]苯基]-6,8-二氧杂双环并[3.2.1]辛烷-1-基]甲醇(3),化合物3经过氢化脱苄得到化合物(1)。该工艺路线操作简单,可操作性强,副反应少,反应收率高,适合工业化生产。     

一种四氢苯并噻唑-2-丙酮肟衍生物及其制备方法和应用

正本发明公开了一种四氢苯并噻唑-2-丙酮肟衍生物及其制备方法和应用,结构通式为R为以下基团中任意一种:4-甲基苯基、苯基、2-甲基苯基、3-甲基苯基、2,5-二甲基苯基、3,5-二甲基苯基、4-正丙基苯基、4-叔丁基苯基、4-甲氧基苯基、3-甲氧基苯基、3,4,5-三甲氧基苯基、3-联苯基、4-三氟甲氧     

茚虫葳中间体N-氯甲酰基-N-[4-(三氟甲氧基)苯基]氨基甲酸甲酯的合成

[目的]研究杀虫剂茚虫葳中间体N-氯甲酰基-N-[4-(三氟甲氧基)苯基]氨基甲酸甲酯适合于工业化生产的合成方法。[方法]以4-(三氟甲氧基)苯胺为启始原料,采用无缚酸剂的均相甲酰化法合成(4-(三氟甲氧基)苯基)氨基甲酸酯。再通过反应精馏的方法与甲醇钠/钾反应得到(4-(三氟甲氧基)苯基)氨基甲酸酯铵钠/钾盐,直接与三光气反应得到N-(氯甲酰基)-N-(4-三氟甲氧基)苯甲酸甲酯粗品,经过重结晶得到精品。[结果]以4-(三氟甲氧基)苯胺为原料经该法合成中间体N-氯甲酰基-N-[4-(三氟甲氧基)苯基]氨基甲酸甲酯,中间体含量在98%以上,收率达96%以上(以4-三氟甲氧基苯胺计)。[结论]采用该合成方法生产茚虫葳中间体N-氯甲酰基-N-[4-(三氟甲氧基)苯基]氨基甲酸甲酯工艺简单,三废少,安全性更高,成本更低。     

3,4,5-三甲氧基苯甲酸化学研究进展

介绍了3,4,5-三甲氧基苯甲酸的合成方法、化学反应和在药物合成中的应用等研究进展,叙述了甲基化法、酯水解法和醛氧化法的优缺点,在化学反应中对3,4,5-三甲氧基苯甲酸的羧基、苯环和甲氧基3个不同反应部位发生的反应进行了总结;叙述了3,4,5-三甲氧基苯甲酸作为药物中间体的用途。认为目前3,4,5-三甲氧基苯甲酸的来源比较单一,合成方法和生产工艺需要进一步探索和改进,对其衍生物作为一个合成砌块没有得到充分发挥。     

2-(4-(4,6-二甲氧基嘧啶-2-氧基)-2-甲基苯基)-2-(取代苯胺)乙腈类衍生物的合成与表征

为了寻求具有除草活性的化合物,以3-甲基苯酚为起始原料,通过酰化反应及取代反应合成了中间体4-(4,6-二甲氧基嘧啶-2-氧基)-2-甲基苯甲醛(Ⅲ),运用中间体(Ⅲ)通过三组分一锅法合成了12个2-[4-(4,6-二甲氧基嘧啶-2-氧基)-2-甲基苯基]-2-(取代苯胺)乙腈类衍生物,三组分反应具有良好的收率,为64%～96%。所合成化合物的结构经核磁共振氢谱、质谱和元素分析进行了表征。     

两个α,β-不饱和酮药物的合成与活性研究

本论文以2-甲氧基苯甲醛、4-甲氧基苯甲醛分别与4-三氟甲基苯甲醛、N-甲基-4-哌啶酮通过Claisen-Schmidt缩合反应得到两个不对称的α,β-不饱和酮化合物3-(4-三氟甲基苯亚甲基)-5-(2-甲氧基苯亚甲基)-N-甲基-4-哌啶酮(A)和3-(4-三氟甲基苯亚甲基)-5-(4-甲氧基苯亚甲基)-N-甲基-4-哌啶酮(B),并通过1H NMR、FTIR、元素分析等进行了充分的结构表征。MTT法评价其对人白血病细胞K562、人单核巨噬细胞THP-1等肿瘤细胞系的抗肿瘤活性及对人正常肝细胞LO2的细胞毒性。研究显示,A和B对K562、THP-1均具有较好的抑制活性。     

新型杀螨剂丁氟螨酯的合成

以对叔丁基苯乙腈为原料,经酯化、酯交换得到中间体2-（4-叔丁基苯基）-氰基乙酸（2-甲氧基）乙基酯（Ⅰ）;邻三氟甲基氯苯发生格氏反应后,通入二氧化碳得到邻三氟甲基苯甲酸,经氯化亚砜氯化得到中间体邻三氟甲基苯甲酰氯（Ⅱ）。中间体2-（4-叔丁基苯基）．氰基乙酸（2．甲氧基）乙基酯（Ⅰ）在碳酸钠催化下与中间体邻三氟甲基苯甲酰氯（Ⅱ）在相转移催化下得到目的产物丁氟螨酯,总收率43．1％（以对叔丁基苯乙腈计）。     

异噁唑类杀虫剂氟噁唑酰胺合成工艺研究

优化合成路线和工艺，合成目的产物氟噁唑酰胺。以3,5-二氯溴苯为原料，经格氏化，与三氟乙酸甲酯反应得到3’,5’-二氯-2,2,2-三氟苯乙酮；在月桂酸钠的催化下，2-甲基-4-乙酰基苯甲酸与3’,5’-二氯-2,2,2-三氟苯乙酮缩合，脱水，再与盐酸羟胺环化得到关键中间体4-[5-(3,5-二氯苯基)-5-三氟甲基-4,5-二氢异噁唑-3-基]-2-甲基苯甲酸；关键中间体经酰氯化后氨解得到4-[5-(3,5-二氯苯基)-5-三氟甲基-4,5-二氢异噁唑-3-基]-2-甲基苯甲酰胺；然后与原甲酸三甲酯，甲氧基胺盐酸盐反应得到目的产物氟噁唑酰胺。产物结构经核磁共振氢谱确证。该工艺简单经济，条件温和，具有工业化应用前景。     

血管阻断剂(Z)-2-甲氧基-5-[2-(3,4,5-三甲氧基苯基)乙烯基]-苯胺的合成

对(Z)-2-甲氧基-5-[2-(3,4,5-三甲氧基苯基)乙烯基]-苯胺(AVE-8063)的合成进行了研究。采用两条路线得到AVE-8063,均以对甲氧基苯乙酸为起始原料,经硝化、Perk in缩合、还原得到(E)-2-(3-氨基-4-甲氧基苯基)-3-(3,4,5-三甲氧基苯基)-丙烯酸(Ⅳ),直接脱羧得到目标化合物(路线1);为改善后处理操作条件,还将化合物Ⅳ的氨基保护、再经脱羧及去保护得到目标化合物(路线2)。路线1和路线2的总收率分别为20.4%和17.1%,均高于文献报道的W ittig反应路线,各中间体及产物结构经MS、IR以及1HNMR确证。     

血管阻断剂活性化合物AVE-8063的合成

对血管阻断剂活性分子(Z)-3'-氨基-3,4,4',5-四甲氧基二苯乙烯(AVE-8063)的合成进行了研究。以对甲氧基苯乙酸(Ⅰ)为原料,经溴代及Perkin反应得到(E)-2-(3-溴-4-甲氧基苯基)-3-(3,4,5-三甲氧基苯基)丙烯酸(Ⅲ),再经芳环上溴的氨基取代得到(E)-2-(3-氨基-4-甲氧基苯基)-3-(3,4,5-三甲氧基苯基)丙烯酸(Ⅳ),最后在Cu/1,10-Phen/PEG-400体系微波辅助下反应6 min即脱羧得到目标化合物(Ⅴ),总收率为60.1%。产物结构经IR、MS和1HNMR确证。     

Design,Synthesis and Evaluation of Novel Derivatives of Curcuminoids with Cytotoxicity

Curcumin and curcuminoids have been discussed frequently due to their promising functional groups (such as scaffolds of α,β-unsaturated β-diketone, α,β-unsaturated ketone and β′-hydroxy-α,β-unsaturated ketone connected with aromatic rings on both sides) that play an important role in various bioactivities, including antioxidant, anti-inflammatory, anti-proliferation and anticancer activity. A series of novel curcuminoid derivatives (a total of 55 new compounds) and three reference compounds were synthesized with good yields using three-step organic synthesis. The anti-proliferative activities of curcumin derivatives were examined for six human cancer cell lines: HeLaS3, KBvin, MCF-7, HepG2, NCI-H460 and NCI-H460/MX20. Compared to the IC₅₀ values of all the synthesized derivatives, most α,β-unsaturated ketones displayed potent anti-proliferative effects against all six human cancer cell lines, whereas β′-hydroxy-α,β-unsaturated ketones and α,β-unsaturated β-diketones presented moderate anti-proliferative effects. Two potent curcuminoid derivatives were found among all the novel derivatives and reference compounds: (E)-5-hydroxy-7-phenyl-1-(3,4,5-trimethoxyphenyl)hept-1-en-3-one (compound 3) and (1E,4E)-1,7-bis(3,4,5-trimethoxyphenyl)hepta-1,4-dien-3-one (compound MD12a). These were selected for further analysis after the evaluation of their anti-proliferative effects against all human cancer cell lines. The results of apoptosis assays revealed that the number of dead cells was increased in early apoptosis and late apoptosis, while cell proliferation was also decreased after applying various concentrations of (E)-5-hydroxy-7-phenyl-1-(3,4,5-trimethoxyphenyl)hept-1-en-3-one (compound 3) and (1E,4E)-1,7-bis(3,4,5-trimethoxyphenyl)hepta-1,4-dien-3-one (compound MD12a) to MCF-7 and HpeG2 cancer cells. Analysis of the gene expression arrays showed that three genes (GADD45B, SESN2 and BBC3) were correlated with the p53 pathway. From the quantitative PCR analysis, it was seen that (1E,4E)-1,7-bis(3,4,5-trimethoxyphenyl)hepta-1,4-dien-3-one (compound MD12a) effectively induced the up-regulated expression of GADD45B, leading to the suppression of MCF-7 cancer cell formation and cell death. Molecular docking analysis was used to predict and sketch the interactions of the GADD45B-α,β-unsaturated ketone complex for help in drug design.     

新型杀菌剂噻氟菌胺的合成研究

以三氟乙酰乙酸乙酯为原料,经氯气氯化得到2-氯-3-三氟乙酰乙酸乙酯,然后与硫代乙酰胺发生环化反应,反应产物水解得到2-甲基-4-三氟甲基-噻唑-5-甲酸.其经酰化后再以甲苯为溶剂,在碱性条件下与2,6-二溴4三氟甲氧基苯胺反应得到噻氟菌胺.总收率55.4％.     

Synthesis of Combretastatin-A4 Carboxamidest that Mimic Sulfonyl Piperazines by a Molecular Hybridization Approach: in vitro Cytotoxicity Evaluation and Inhibition of Tubulin Polymerization

Molecular hybridization approach is a promising structural modification tool to design new chemical entities (NCEs) by mimicking two different pharmacophoric units into one scaffold to enhance the biological properties. With this aim, combretastatin-A4 acids were integrated with sulfonyl piperazine scaffolds as a one molecular platform and evaluated for their in vitro antiproliferative activity against a panel of human cancer lines cell lines namely, lung (A549), mouse melanoma (B16F10), breast (MDA MB-231and MCF-7) and colon (HCT-15) by MTT assay. Amongst which the compound (E)-3-(4-Chlorophenyl)-1-(4-((4-chlorophenyl)sulfonyl)piperazin-1-yl)-2-(3,4,5-trimethoxyphenyl)prop-2-en-1-one ( 5 ab ) displayed significant IC₅₀ values in the range of 0.36 to 7.08 μm against the selected cancer cell lines. Moreover, 5 ab was found to be the most potent member of this series with IC₅₀ 0.36±0.02 μm . Further investigations revealed that the compound 5 ab displayed significant inhibition of tubulin assembly with IC₅₀ 5.24±0.06 μm and molecular docking studies also disclosed the binding of 5 ab effectively in CA4 binding space at the colchicine binding site. The flow cytometric analysis demonstrated that the compound 5 ab caused cell cycle arrest at G2/M phase in A549 cells. Compound 5 ab induced apoptosis in A549 cells which was further evaluated by different staining assays such as DAPI and AO which undoubtedly speculated, the induction of apoptosis. To study the anti-migration with 5 ab , cell migration/scratch wound assay was performed and the extent of apoptosis was studied by Annexin-V, including mitochondrial potential by JC-1 staining.     

Identification of 4-Anilinoquin(az)oline as a Cell-Active Protein Kinase Novel 3 (PKN3) Inhibitor Chemotype**

Deep annotation of a library of 4-anilinoquin(az)olines led to the identification of 7-iodo-N-(3,4,5-trimethoxyphenyl)quinolin-4-amine 16 as a potent inhibitor (IC₅₀=14 nM) of Protein Kinase Novel 3 (PKN3) with micromolar activity in cells. Compound 16 is a potential tool compound to study the cell biology of PKN3 and its role in pancreatic and prostate cancer and T-cell acute lymphoblastic leukemia. These 4-anilinoquin(az)olines may also be useful tools to uncover the therapeutic potential of PKN3 inhibition in a broad range of diseases.     

Divergent Synthesis and Evaluation of the in vitro Cytotoxicity Profiles of 3,4-Ethylenedioxythiophenyl-2-propen-1-one Analogues

A new series of 3,4-ethylenedioxythiophene (EDOT)-appended propenones were prepared by condensation reaction and their in vitro cytotoxicity effects were evaluated against five human cancer cell lines. Preliminary structure–activity relationships of EDOT-incorporated 2-propenone derivatives were also established. The EDOT-appended enones demonstrated significant cytotoxicity against human cancer cell lines. The most active analogue, (E)-3-(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-1-(3,4,5-trimethoxyphenyl)prop-2-en-1-one ( 3 p , GI₅₀=110 nm ), severely inhibited the clonogenic potential of cancer cells, and induced cell-cycle arrest in the G2/M phase and caused an accumulation of HCT116 colon cancer cells with >4 N DNA content. Also, 3 p exhibited weak inhibition of the enzymatic activity of human topoisomerase I. Molecular docking studies indicated preferential binding of the compounds to the ATP-binding pocket of the human checkpoint 2 kinase (Chk2) catalytic domain, thus, identifying a novel diaryl 2-propenone chemotype for the development of potent inhibitors of Chk2.     

Experimental and Quantum Chemical Studies on Corrosion Inhibition Performance of Thiazolidinedione Derivatives for Mild Steel in Hydrochloric Acid Solution

In the present investigation, two thiazolidinedione derivatives, 5-[(2-(3,4,5-trimethoxyphenyl)-6-phenylimidazo[2,1-b][1,3,4]thiadiazol-5-yl)methylidene]-1,3-thiazolidine-2,4-dione (Inh I) and 5-[2-(3,4,5-trimethoxyphenyl)-6-(4-methoxylphenyl)-imidazo[2,1-b][1,3,4]thiadiazol-5-yl)methylidene]-1,3-thiazolidine-2,4-dione (Inh II) were synthesized and investigated as inhibitors for mild steel corrosion in 15% HCl solution using the weight loss, electrochemical polarization, and electrochemical impedance spectroscopy (EIS) techniques. It was found that the inhibition efficiency of these inhibitors increased with increasing concentration. The effect of temperature on the corrosion rate was investigated, and some thermodynamic parameters were calculated. Polarization studies showed that both studied inhibitors were of mixed type in nature. The adsorption of inhibitors on the mild steel surface in acid solution was found to obey the Langmuir adsorption isotherm. Scanning electron microscopy (SEM) was performed on inhibited and uninhibited mild steel samples to characterize the surface. The semi-empirical AM1 method was employed for theoretical calculation of highest (E _HOMO), and lowest unoccupied molecular orbital (E _LUMO) energy levels, energy gap (E _LUMO ? E _HOMO), dipole moment (μ), global hardness (γ), softness (σ), binding energy, molecular surface area, chemical potential (Pi), and the fraction of electrons transferred from the inhibitor molecule to the metal surface (ΔN). The results were found to be consistent with the experimental findings.     

固相法合成1-二茂铁基-3-(3′,4′,5′-三甲氧基苯基)-2-丙烯-1-酮

以没食子酸为原料合成3,4,5-三甲氧基苯甲醛(TMB),利用活性基团拼接原理,将TMB和乙酰基二茂铁通过固相缩合,制得1-二茂铁基-3-(3',4',5'-三甲氧基苯基)-2-丙烯-1-酮。目标化合物结构经元素分析、IR、1H NMR、13C NMR确认。     

Trifluoromethylcinnamanilide Michael Acceptors for Treatment of Resistant Bacterial Infections

A series of thirty-two anilides of 3-(trifluoromethyl)cinnamic acid (series 1) and 4-(trifluoromethyl)cinnamic acid (series 2) was prepared by microwave-assisted synthesis. All the compounds were tested against reference strains Staphylococcus aureus ATCC 29213 and Enterococcus faecalis ATCC 29212 and resistant clinical isolates of methicillin-resistant S. aureus (MRSA) and vancomycin-resistant E. faecalis (VRE). All the compounds were evaluated in vitro against Mycobacterium smegmatis ATCC 700084 and M. marinum CAMP 5644. (2E)-3-[3-(Trifluoromethyl)phenyl]-N-[4-(trifluoromethyl)phenyl]prop-2-enamide (1j), (2E)-N-(3,5-dichlorophenyl)-3-[3-(trifluoromethyl)phenyl]prop-2-enamide (1o) and (2E)-N-[3-(trifluoromethyl)phenyl]-3-[4-(trifluoromethyl)-phenyl]prop-2-enamide (2i), (2E)-N-[3,5-bis(trifluoromethyl)phenyl]-3-[4-(trifluoromethyl)phenyl]-prop-2-enamide (2p) showed antistaphylococcal (MICs/MBCs 0.15–5.57 µM) as well as anti-enterococcal (MICs/MBCs 2.34–44.5 µM) activity. The growth of M. marinum was strongly inhibited by compounds 1j and 2p in a MIC range from 0.29 to 2.34 µM, while all the agents of series 1 showed activity against M. smegnatis (MICs ranged from 9.36 to 51.7 µM). The performed docking study demonstrated the ability of the compounds to bind to the active site of the mycobacterial enzyme InhA. The compounds had a significant effect on the inhibition of bacterial respiration, as demonstrated by the MTT assay. The compounds showed not only bacteriostatic activity but also bactericidal activity. Preliminary in vitro cytotoxicity screening was assessed using the human monocytic leukemia cell line THP-1 and, except for compound 2p, all effective agents did show insignificant cytotoxic effect. Compound 2p is an interesting anti-invasive agent with dual (cytotoxic and antibacterial) activity, while compounds 1j and 1o are the most interesting purely antibacterial compounds within the prepared molecules.