4-氨基-2-三氟甲基喹唑啉衍生物的合成及其体外抗肿瘤活性研究

目的 基于喹唑啉为母核设计发现新型抗肿瘤活性化合物。方法 以邻氨基苯甲酰胺和三氟乙酸酐为起始原料采用缩合、环化、氯代和偶联反应等合成了一系列4-氨基-2-三氟甲基喹唑啉衍生物(5a~5u)。采用四甲基偶氮唑盐(MTT)法评价所得目标化合物对人肺癌细胞A549、人宫颈癌细胞Hela、人白血病细胞K562、人前列腺癌细胞PC-3、人前列腺癌细胞LNCaP这5种肿瘤细胞的体外增殖抑制活性。结果 化合物5c在5 μmol·L^-1时对PC-3肿瘤细胞的抑制率为49.3%,化合物6a对LNCaP和K562、以及6b对PC-3的抑制率超过了50.0%。结论 本实验设计合成的4-氨基-2-三氟甲基喹唑啉类化合物多数具有一定的抗肿瘤活性,特别是4-氨基的N-甲基化产物6a、6b的体外抗肿瘤活性较原型化合物(5n与5u)显著增强,为该类化合物的进一步研究提供参考。     

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??OBJECTIVE To synthesize the derivatives of 8-amino benzofuran[3,2-d]pyrimidine and study their anticancer activities.METHODS The target compounds were synthesized through a series of reactions, and their anticancer activities in vitro were evaluated against COLO205, MCF-7 and K562 cell lines by MTT as assay. RESULTS Nine title compounds were synthesized and confirmed by EI-MS,¹H-NMR and ¹³C-NMR.Compounds 2, 3d and 5c had good inhibition effect against COLO205, MCF-7 and K562 cells.The inhibition rates of compound 5c against COLO205, MCF-7 and K562 cells were 99.58%,78.75% and 98.68% respectively at 10^-4 mol??L^-1. CONCLUSION The anticancer activity of benzofuran[3,2-d] pyrimidine derivatives is worthy of further study.     

Antiproliferative activity of three methoxylated flavonoids isolated from Zeyheria montana Mart. (Bignoniaceae) leaves

The present study isolated three major active flavonoids, two flavones named 4',5,7-trimethoxy-luteolin (1) and 6-hydroxy-5,7-dimethoxyflavone (2) and the flavanone 5-hydroxy-6,7-dimethoxyflavanone (3) from Zeyheria montana dichloromethane leaf extract. Isolation and purification were conducted with the application of column chromatography and structures were assigned by spectral analysis. All compounds were evaluated for cytotoxic activities against human tumor cell lines UACC-62 (melanoma), MCF-7 (breast), NCI-ADR/RES (breast expressing phenotype multiple drug resistance), 786-0 (renal), NCI-H460 (lung, non-small cells), PC-3 (prostate), OVCAR-3 (ovarian), HT-29 (colon) and K562 (leukemia) in vitro. All compounds were active in different degrees on several tumor cell lines and flavanone 3 showed cytotoxicity against almost all cell lines, particularly against human NCI-ADR/RES and K562 cell lines. In conclusion, three antiproliferative compounds were isolated for the first time from Zeyheria montana and its leaves were characterized as an important source of methoxylated flavones and flavanone as potential antitumor compounds.     

Triterpenoids from the floral spikes of Betula platyphylla var. japonica and their reversing activity against multidrug-resistant cancer cells

Four new triterpenes, together with 16 known triterpenes, were isolated from the floral spikes of Betula platyphylla var. japonica in a search for compounds capable of reversing multidrug resistance in cancer cells. The structures of the new triterpenes were elucidated as 3,4-seco-olean-4(23),13(18)-dien-3-oic acid (1), 3,4-seco-urs-4(23),20(30)-dien-3-oic acid (2), 3-O-methylmalonylepiocotillol II (6), and 3-O-methylmalonylcabraleahydroxylactone (16) by spectroscopic examination. The cytotoxicity of the isolated triterpenes against human cancer cell lines as well as multidrug-resistant cancer cell lines was evaluated. Most of the isolated triterpenes showed very weak cellular toxicities. Although no discernible differences were found in the cytotoxicities for the tested compounds against sensitive and resistant cell lines, the cytotoxicities for several triterpenes against multidrug-resistant cancer cell lines (KB-C2 or K562/Adr) were enhanced in the presence of nontoxic concentrations of colchicine or doxorubicin. Compound 10 reversed the cytotoxicity of colchicine against KB-C2 cells at 8.1 microM and showed comparable potency to 5 microM verapamil.     

Synthesis of A-seco derivatives of betulinic acid with cytotoxic activity

In this study, the relationships between the chemical structure and cytotoxic activity of betulinic acid (1) derivatives were investigated. Eight lupane derivatives (1-8), one of them new (6), five diosphenols (9-13), four of them new (10-13), two new norderivatives (14 and 15), five seco derivatives (16-20), four of them new (16, 17, 19, and 20), and three new seco-anhydrides (21-23) were synthesized from 1, and their activities were compared with the activities of known compounds. The effects of substitution on the A-ring and esterification of the carboxyl group in position 28 on cytotoxicity were of special interest. Significant cytotoxic activity against the T-lymphoblastic leukemia cell line CEM was found in diosphenols 9 and 13 (TCS(50) 4 and 5 micromol/L) and seco-anhydrides 22 and 23 (TCS(50) 7 and 6 micromol/L). All compounds were also tested on cancer cell lines HT 29, K562, K562 Tax, and PC-3, and these confirmed activity of diosphenols 9, 10, and 11 and anhydride 22. Diosphenols, as the most promising group of derivatives, were further tested on four more lines (A 549, DU 145, MCF 7, SK-Mel2).     

Cytotoxic principles from Ventilago leiocarpa

Three new anthraquinones, islandicin 4-methyl ether (1), 1,2,6-trihydroxy-7,8-dimethoxy-3-methylanthraquinone (2), and 2-hydroxyemodin 1-methyl ether (3) as well as two known triterpenoids [taraxerol (4), lupeol (5)], six anthraquinones [chrysophanol (6), islandicin (8), parietin (9), emodin (10), catenarin (11), skyrin (15)], a 2,3-dihydroflavonol [(+)-aromadendrin (12)], two benzisochromanquinones [ventiloquinone K (13) and ventiloquinone I (14)], and stigmasterol (7) were isolated from Ventilago leiocarpa. The cytotoxicity of these compounds to various tumor cell lines was evaluated, and compound 15 significantly suppressed growth of HeLa, Vero, K562, Raji, Wish, and Calu-1 tumor cell lines. With the exception of K562 cells, the proliferation of other tumor cell lines was inhibited by compounds 3 and 10.     

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??OBJECTIVE To study the anti-cancer components of Calotropis gigantean L.METHODS The powdered whole plants of C. gigantea were extracted with 95% alcohol. After removal of the solvent, the residue was extracted with petroleum ether and chloroform, and the compounds in the chloroform extract were isolated and purified by different column chromatograghies carried out on silica gel, RP-18, MCI, and Sephadex LH-20 and their structures were elucidated by spectral data. RESULTS Thirteen compounds were isolated and their structures were characterized as gofruside(1), uzarigenin(2), arjunolic acid(3), 3??-(1??-hydroxyethyl)-7-hydroxy-1-isobenzofuranone(4), daucosterol(5), syringaresinol(6),12-O-benzoyl-deacylmetaplexigenin(7), 3-hydroxy-4-methoxybenzoic acid(8), oleanolic acid(9),??-sitosterol(10), methyl 1-naphthaleneacetate(11), butylparaben(12),??-D-oleandropyranoside(13), and compounds 2-4,6-9, and 11-13 were isolated from this plant for the first time. Compounds 1 and 2 showed cytotoxicity against HLE, K562, RPMI8226, MCF7, MDA, and WM9 cell lines, with K562 and RPMI8226 being the most sensitive cells.CONCLUSION Compounds 1 and 2 are premilinarily judged as the anti-cancer components in C. gigantean.     

Cytotoxic and apoptosis-inducing activities of triterpene acids from Poria cocos

Six lanostane-type triterpene acids (1a-6a), isolated from Poria cocos , and their methyl ester (1b-6b) and hydroxy derivatives (1c-6c) were prepared. Upon evaluation of the cytotoxic activity of these compounds against leukemia (HL60), lung (A549), melanoma (CRL1579), ovary (NIH:OVCAR-3), breast (SK-BR-3), prostate (DU145), stomach (AZ521), and pancreas (PANC-1) cancer cell lines, 11 compounds (5a, 6a, 2b-5b, 1c, and 3c-6c) exhibited activity with single-digit micromolar IC(50) values against one or more cell lines. Poricotriol A (1c), a hydroxy derivative of poricoic acid A (1a), exhibited potent cytotoxicities against six cell lines with IC(50) values of 1.2-5.5 μM. Poricotriol A induced typical apoptotic cell death in HL60 and A549 cells on evaluation of the apoptosis-inducing activity by flow cytometric analysis. Western blot analysis in HL60 cells showed that poricotriol A activated caspases-3, -8, and -9, while increasing the ratio of Bax/Bcl-2. This suggested that poricotriol A induced apoptosis via both mitochondrial and death receptor pathways in HL60. On the other hand, poricotriol A did not activate caspases-3, -8, and -9, but induced translocation of apoptosis-inducing factor (AIF) from mitochondria and increased the ratio of Bax/Bcl-2 in A549. This suggested that poricotriol A induced apoptosis via the mitochondrial pathway mostly by translocation of AIF, independent from the caspase pathway in A549. Furthermore, poricotriol A was shown to possess high selective toxicity in lung cancer cells since it exhibited only weak cytotoxicity against a normal lung cell line (WI-38).     

Nitrogen-containing compounds from Salvia miltiorrhiza

Five new N-containing compounds, neosalvianen (1), salvianen (2), salvianan (3), salviadione (4), and 5-(methoxymethyl)-1H-pyrrole-2-carbaldehyde (5), were isolated from Salvia miltiorrhiza. Their structures were mainly established by spectroscopic methods. Neosalvianen (1) and its analogues (6a, 6b) were synthesized for spectroscopic data comparison. Compounds 1, 2, 4, and 6a were evaluated for their cytotoxic activities against selected cancer cell lines. Among these components, salvianen (2) exhibited the most potent cytotoxicity with a CD50 range of 30.4-39.5 microM against HeLa (cervical epitheloid carcinoma), HepG2 (hepatocellular carcinoma), and OVCAR-3 (ovarian adenocarcinoma) cell lines in a dose-dependent manner. The cytotoxicities of the tested compounds were not specific and showed similar activities to the selected cancer cell lines.     

In vitro antileishmanial and antimalarial activities of tetrahydrofuran lignans isolated from Nectandra megapotamica (Lauraceae)

Seven tetrahydrofuran lignans, isolated from Nectandra megapotamica (Lauraceae), were evaluated for their in vitro antileishmanial and antimalarial activities. Among the evaluated compounds, machilin-G (1a) and veraguensin (2a) showed the highest antileishmanial activities, displaying for both compounds an IC(50) value of 18 microg/mL and an IC(90) value of 36 microg/mL, while galgravin (1b), nectandrin-A (1c), nectandrin-B (1d), calopeptin (2b) and ganshisandrine (3) were inactive against Leishmania donovani. In the antimalarial assay against Plasmodium falciparum, it was observed that calopeptin (2b) displayed moderate activity, with IC(50) values of 3800 ng/mL (D6 clone) and 3900 ng/mL (W2 clone), while the lignans 1a-1d, 2a and 3 were inactive. In order to compare the effect on the parasites with toxicity to mammalian cells, the cytotoxic activity of the isolated compounds were evaluated against the Vero cells, showing that all evaluated tetrahydrofuran lignans exhibited no cytotoxicity at the maximum dose tested.     

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??OBJECTIVE To synthesize 5-substituted indole-3-deoxypodophyllotoxin derivatives and study their antitumor activity. METHODS The target compounds were synthesized through a series of reactions and their anti-tumor activity in vitro were evaluated against Hela, K562 and K562/A02 cell lines by MTT as assay. RESULTS Ten target compounds were synthesized and confirmed by ¹H-NMR, ¹³C-NMR, and HR-ESI-MS. All the target compounds had different degrees of cytotoxic activity in vitro. Most of the compounds had significant anti-MDR activity in vitro. CONCLUSION 5-Substituted indole-3-deoxypodophyllotoxin derivatives have good antitumor activity and worth of further study.     

Sesterterpenoids from the sponge Sarcotragus sp

Nineteen new sesterterpenoids and eight known compounds were isolated from the sponge Sarcotragus sp. collected from Soheuksan Island, Korea. The structures of these compounds were determined to be linear sesterterpenoids containing furan or related oxygenated functionalities on the basis of combined chemical and spectroscopic analyses. In addition, the configurations of several previously undetermined compounds were assigned. Several compounds exhibited moderate to major antibacterial activity (compounds 1- 3, 17, 18) and cytotoxicity ( 3, 11, 12) against the K562 cell line and inhibitory activity against isocitrate lyase ( 6, 13).     

西松烷型二萜衍生物的合成及抗肿瘤活性研究

目的基于西松烷型二萜天然产物新巴豆瑞士松酸进行结构修饰,并对得到的衍生物进行体外抗肿瘤活性评价。方法以新巴豆瑞士松酸为起始原料,通过缩合反应、点击化学反应得到目标化合物。采用噻唑蓝(MTT)法考察所合成的目标化合物对HeLa、K562和K562A/02肿瘤细胞的抗增殖活性。结果合成了11个文献未报道的新巴豆瑞士松酸衍生物,其结构经~1H-NMR、~(13)C-NMR及HR-MS确定。活性测试结果表明,部分衍生物表现出一定的抗肿瘤活性,其中,化合物2f对HeLa细胞表现出良好活性,化合物2e对K562和耐药的K562A/02细胞表现出良好活性。结论部分衍生物对耐药的K562A/02细胞表现出抗肿瘤活性,具有进一步研究价值。     

抗肿瘤氟喹诺酮C-3(稠)杂环化合物双NFDE6二唑甲硫醚及其碘甲烷盐衍生物的合成(Ⅰ)

目的 寻找由抗菌氟喹诺酮向抗肿瘤氟喹诺酮转化的有效结构修饰途径。方法 以抗菌氟喹诺酮药物氧氟沙星1为原料,其相应的酰肼2与二硫化碳缩环合得C-3NFDE6二唑硫醇3中间体,然后分别与5-取代苯基-2-氯甲基-1,3,4-NFDE6二唑4a~4g缩合得含氟喹诺酮骨架的双NFDE6二唑甲硫醚5a~5g,接着用碘甲烷进行季铵化反应得相应的季铵盐6a~6g。用MTT方法评价了目标化合物5a~5g和6a~6g体外对肿瘤细胞的生长抑制活性。结果 合成了14个新的目标化合物,体外均显示潜在的抗癌活性（IC₅₀＜25 μmol·L）,其中季铵盐6a~6g的活性高于相应游离碱5a~5g的活性。结论 基于抗菌氟喹诺酮C-3杂环的抗肿瘤氟喹诺酮的设计值得进一步研究。     

旱生香茶菜中的三萜成分(英文)

目的:研究旱生香茶菜的化学成分。方法:采用多种色谱技术和方法进行分离,通过波谱分析鉴定化合物结构。采用MTT法进行人体肿瘤细胞毒体外活性实验。结果:从旱生香茶菜叶中分离并鉴定了10个三萜类化合物:齐墩果酸(1),乌苏酸(2),maslinicacid(3),2α-羟基乌苏酸(4),hederagenin(5),3β,23-dihydroxy-urs-12-en-28-oicacid(6),arjunolicacid(7),asiaticacid(8),2α,3α,24-trihydroxyolean-12-en-28-oicacid(9),2α,3α,24-trihydroxyurs-12-en-28-oicacid(10)。测试了10个化合物对3种(K562,MKN45,HepG2)人体肿瘤细胞株的细胞毒活性。结论:化合物1-10均首次从该植物中分离得到,并讨论了它们的生源关系。所有三萜化合物对上述三种人体肿瘤细胞株都没有细胞毒活性。     

Indole alkaloids and other constituents of Rauwolfia serpentina

From the dried roots of Rauwolfia serpentina were isolated five new indole alkaloids, N(b)-methylajmaline (1), N(b)-methylisoajmaline (2), 3-hydroxysarpagine (3), yohimbinic acid (4), isorauhimbinic acid (5), a new iridoid glucoside, 7-epiloganin (6), and a new sucrose derivative, 6'-O-(3,4,5-trimethoxybenzoyl)glomeratose A (7), together with 20 known compounds. The structures of the new compounds were determined by spectroscopic and chemical means. The inhibitory activities of the selected alkaloids on topoisomerase I and II and their cytotoxicity against the human promyelocytic leukemia (HL-60) cell lines were assessed.     

Biological activity of Anthraquinones and Triterpenoids from Prismatomeris fragrans

A new 1,3-dihydroxy-2-methyl-5,6-dimethoxyanthraquinone (1); six known anthraquinones, nordamnacanthal (2), damnacanthal (3), rubiadin (4), rubiadin-1-methyl ether (5), lucidin-ω-methyl ether (6), and 1-hydroxy-2-hydroxymethyl-3-methoxyanthraquinone (7); a β-sitosterol (8); together with two known triterpenoids, β-acetylolean-12-en-28-olic acid (9), and 3β-O-acetyl-11,12-epoxyolean-28,13-olide (10) were isolated from the roots and stems of Prismatomeris fragrans. Their structures were established on the basis of spectral data. This is the first isolation of compounds 2, 6, 7, 9 and 10 from Prismatomeris genus. The isolated compounds were evaluated in antiplasmodial, antituberculosis, antifungal and anticancer cell lines tests. The bioactivity assays showed that only 9 exhibited moderate antimalarial activity, 2 and 3 exhibited antifungal activity while 2, 3, 4, 7 and 9 showed antituberculosis activity. In addition, compounds 2, 3 and 7 exhibited cytotoxicity to BC cell line while 1, 1a (the methyl ether derivative of 1), 2, 3, 4, 5, and 9 exhibited cytotoxicity to NCI-H187 cell line.     

ent-贝壳杉烯糖酯类衍生物的合成及其抗肿瘤活性的研究（英文）

目的：对含有exo-亚甲基环戊酮或α-亚甲基内酯药效团的ent-贝壳杉烯类化合物进行结构修饰,以改善其活性及水溶性。方法：以甜菊苷为原料,在4位羧基接入单糖而得到目标化合物,并使用MTT法对目标化合物进行抗肿瘤活性测试。结果：化合物1b对细胞株HepG2,Bel-7402,A549,MCF-7,MDA-MB-231均表现出了较好的抑制活性,IC50分别为0.12,0.91,0.35,0.08,0.07μmol·L–1。另外,化合物3c对HepG2（IC50=0.01μmol·L–1）具有较强的抑制作用。结论：化合物1b和3c可以作为潜在的抗肿瘤化合物进行深入研究。     

Cytotoxic and apoptosis-inducing activities of limonoids from the seeds of Azadirachta indica (neem)

Thirty-five limonoids, including 15 of the azadiradione type (1-15), five of the gedunin type (16-20), four of the azadirachtin type (21-24), nine of the nimbin type (25-33), and two degraded limonoids (34, 35), isolated from Azadirachta indica seed extracts, were evaluated for their cytotoxic activities against five human cancer cell lines. Seven compounds (3, 6, 7, 16, 18, 28, and 29) exhibited cytotoxic activity against one or more cell lines. Among these compounds, 7-deacetyl-7-benzoylepoxyazadiradione (7), 7-deacetyl-7-benzoylgeduin (18), and 28-deoxonimbolide (28) exhibited potent cytotoxic activity against HL60 leukemia cells with IC(50) values in the range 2.7-3.1 μM. Compounds 7, 18, and 28 induced early apoptosis in HL60 cells, observed by flow cytometry. Western blot analysis showed that compounds 7, 18, and 28 activated caspases-3, -8, and -9 in HL60 cells. This suggested that compounds 7, 18, and 28 induced apoptotic cell death in HL60 cells via both the mitochondrial- and the death receptor-mediated pathways. Futhermore, compound 7 was shown to possess high selective cytotoxicity for leukemia cells since it exhibited only weak cytotoxicity against a normal lymphocyte cell line (RPMI 1788).     

Aspochalasins I, J, and K: three new cytotoxic cytochalasans of Aspergillus flavipes from the rhizosphere of Ericameria laricifolia of the Sonoran Desert

Bioassay-guided fractionation of a cytotoxic EtOAc extract of Aspergillus flavipes occurring in the rhizosphere of Ericameria laricifolia resulted in the isolation of three new cytochalasans, namely, aspochalasins I (1), J (2), and K (3), and four known cytochalasans, aspochalasins C (4), D (5), and E (6) and TMC-169 (7). The structures of compounds 1-3 were established on the basis of extensive 1D and 2D NMR spectroscopic analysis. All compounds exhibited weak to moderate cytotoxicity against NCI-H460, MCF-7, and SF-268 cancer cell lines, but none showed significant selectivity.