N,N′-二(间二甲胺基苯基)-3,6-二甲基-1,4-二氢-1,2,4,5-四嗪-1,4-二甲酰胺的合成及其抗肿瘤活性

由3,6-二甲基-1,6-二氢-1,2,4,5-四嗪、双光气和间-(N,N-二甲胺基)苯胺反应生成的新化合物N,N′-二(间二甲胺基苯基)-3,6-二甲基-1,4-二氢-1 ,2,4,5-四嗪-1,4-二甲酰胺对P388和A-549肿瘤细胞的生长具有明显的抑制作用. 同时分离得到未见文献报道的副产物N,N′-二(间二甲胺基)苯基脲.     

—N,N‘—二（间二甲胺基苯基）—3,6—二甲基—1,4二氢 …

由３,６－二甲基－１,６二氢－１２,４,５－四嗪、双光气和间－（Ｎ,Ｎ－二甲胺基）苯胺反应生成的新化合物Ｎ,Ｎ’－二（间二甲胺基苯基）－３,６－二甲基－１,４－二氢－１,２,４,５－四嗪－１,４－二甲酰胺对Ｐ３８８和Ａ－５４９肿瘤细胞的生长具有明显的抑制作用。同时分离得到未见文献报道的副产物Ｎ,Ｎ’－二（间二甲胺基）苯基脲。     

1,4-二氢-s-四嗪-3,6-二甲酸衍生物的合成研究

自从1900年Hautgsh首次合成了s-四嗪以来,对四嗪类化合物的研究已经引起了人们的兴趣[1,2],并被应用于医药、农药、炸药和液晶材料等方面[3,4,5],其中1,4-二氢-s-四嗪及其一些衍生物还表现出了较好的抗癌活性[6,7],有望发展成一类新型的抗癌药物.     

左旋氧氟沙星衍生物(YH54,YH57)体外抗菌活性

ＹＨ5 4、ＹＨ5 7是以左旋氧氟沙星为先导化合物合成的新氟喹诺酮[1] 。其化学名分别为 :(Ｓ) 9 氟 2 ,3 二氢 3 甲基 8 氨基 10 (4 甲基 1 哌嗪基 ) 7 氧代 7Ｈ 吡啶并 [1,2 ,3 ｄｅ][1,4]苯并 口恶嗪 6 羧酸、(Ｓ) 9 氟 2 ,3 二氢 3 甲基 8 氨基 10 (3 甲基 1 哌嗪基 ) 7 氧代 7Ｈ 吡啶并 [1,2 ,3 ｄｅ][1,4]苯并口恶嗪 6 羧酸。本文研究其抗菌活性。1　材料与方法1.1　细菌来源　 1998年至 1999年从上海、南通等地医院门诊及住院患者经常规分离获得的临床致病菌株 (Ｔａｂ 1)。1.2　培养基与药物　选用ＭＨ培养基。Ｙ…     

1,4-二［3-(氨基硫代甲酰硫基)丙酰基］哌嗪类化合物的合成及其抗肿瘤活性

目的　寻找并合成低毒、有较强抗肿瘤活性的哌嗪类化合物。方法和结果　以1,4-二(3-溴丙酰基)哌嗪为先导物,合成了一系列1,4-二［3-(氨基硫代甲酰硫基)丙酰基］哌嗪类新化合物,并测试了这些化合物(4a-j)对8种瘤细胞株的体外抗肿瘤活性。结论　体外抗肿瘤活性试验结果表明,大多数化合物显示一定的抗肿瘤活性,尤其是化合物4c,4d和4e,浓度在10μmol.L^-1时,对HL-60细胞抑制率分别为44%,90%和70%。     

新法合成1,4-苯并二氮杂化合物

1,2-乙二亚胺盐1与亚氨基化合物2环合成1,4-苯并二氮杂3。R=CH_3系列化合物非常稳定;R=H时,C-2上氨基易消除成3-氨基-3 H-1,4-苯并二氮杂化合物4,此种特点又与苯核上X取代基性质密切相关。     

3-取代-5-羧苯基-四氢-1,3,5-噻二嗪-2-硫酮类化合物的合成

报道了6个新的具抗菌活性的3-取代-5-羧苯基-四氢-1,3,5-噻二嗪-2-硫酮化合物的合成,即用不同的伯胺与氢氧化钾和二硫化碳反应,再与甲醛和对氨基苯甲酸作用而得.     

2-咪唑基-戊-1,4-二烯-3-酮类衍生物的合成及其抗菌活性研究

目的设计合成2-咪唑基-戊-1,4-二烯-3-酮类衍生物,并进行抗菌活性测试。方法以不同取代的苯甲醛为起始原料,经过Aldol缩合、溴代、亲核取代和Knoevenagel缩合四步反应合成目标化合物;采用微量稀释法测定化合物最低抑菌浓度(MIC)值。结果合成了30个未见文献报道的新化合物,其结构均经1H-NMR、MS谱测定。结论目标化合物均表现出一定的抗菌活性,可作为先导化合物做进一步改造和修饰。     

氨基吡咯里嗪酮的制备和异构体的结构鉴定

对1,2-二氢-1-吡咯里嗪酮(1)进行硝化,得到其5,6和7位3种硝基取代物(2)。确证了该3种硝基取代物的结构。经还原,制得了相应的3种氨基-1,2-二氢-1-吡咯里嗪酮类化合物。     

1-乙基-1,4-二氢-7-硝基-4-氧-6-(1-哌嗪基)喹啉-3-羧酸的合成

氟哌酸(Norfloxacin,8)为吡酮酸类抗菌药物的优秀代表之一,由7-氯-1-乙基-6-氟-1,4-二氢-4-氧喹啉-3-羧酸同无水哌嗪缩合而得,由于氯、氟对亲核取代相竞争,在一般条件下有25％左右的氟被哌嗪取代了的副产物生成(J Med Chem 1980,23:1358)。基于芳香硝基对亲核试剂的敏感性高于氯(化学通报 1983,(5):38),我们设想把7-位氯改为硝基,即用1-乙基-1,4-二氢-7-硝基-4-氧-6-氟喹啉-3-羧酸乙酯(1)与无水哌嗪反应、有可能减少     

Pyrrolobenzodiazepine and related systems. I. Synthesis and pharmacological evaluation of new 5,6-dihydro-4H-pyrrolo[1,2-a][1,4]benzodiazepine derivatives

Some new 5,6-dihydro-4H-pyrrolo[1,2-a][1,4]benzodiazepine derivatives substituted at the 5 position have been synthesized and tested to evaluate their antidepressant and neuropsychopharmacological activities. The antinociceptic action of these compounds has been also assayed. The introduction of an ethoxycarbonyl group at the 4 position generally decreased the antidepressant effect.     

Permanently charged chiral 1,4-dihydropyridines: molecular probes of L-type calcium channels. Synthesis and pharmacological characterization of methyl(omega-trimethylalkylammonium) 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylate iodide, calcium channel antagonists

We report the synthesis of the single enantiomers of permanently charged dihydropyridine derivatives (DHPs with alkyl linker lengths of two and eight carbon atoms) and their activities on cardiac and neuronal L-type calcium channels. Permanently charged chiral 1,4-dihydropyridines and methyl (omega)-trimethylalkylammonium) 1,4-dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylate iodides were synthesized in high optical purities from (R)-(-) and (S)-(+)-1,4-dihydro-2,6-dimethyl-5-methoxycarbonyl-4-(3-nitrophenyl)-3-+ ++pyridinecarboxylic acid, obtained by resolution of racemic 1,4-dihydro-2,6-dimethyl-5-methoxycarbonyl-4-(3-nitrophenyl)-3-pyridi necarboxylic acid. Competition binding experiments with radioligand [3H]-(+)-PN200-110 and the block of whole cell barium currents through L-type calcium channels in GH4C1 cells show that the compounds with the eight-carbon alkyl linker optimally block the L-type Ca2+ channels, and that the S-enantiomer is more potent than the R-enantiomer.     

3,4-Dihydro-1H-1,4-oxazino[4,3-a]indoles as potential antidepressants.

A series of 3,4-dihydro-1H-1,4-oxazino[4,3-a]indoles bearing basic side chains has been synthesized by a novel chemical process. These compounds have been screened for potential antidepressant activity. One of these derivatives, 3,4-dihydro-1,10-dimethyl-1-(3-methylaminopropyl)-1H-1,4-oxazino[4,3-a]indole (AY-23,673), was particularly potent in the prevention of reserpine ptosis test in mice, with an ED50 of 0.5 mg/kg ip.     

Synthesis and antimicrobial evaluation of new 1,4-dihydro-4-pyrazolylpyridines and 4-pyrazolylpyridines

ABSTRACT: BACKGROUND: Dialkyl 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylates (1,4-DHP) have now been recognized as vital drugs. Some of these derivatives such as amlodipine, felodipine, isradipine, etc. have been commercialized. In view of wide range of biological properties associated with 1,4-DHP and owing to the biological importance of the oxidation step of 1,4-DHP, we carried out the synthesis and antimicrobial evaluation of new diethyl 1,4-dihydro-2,6-dimethyl-4-(3-aryl-1-phenyl-4-pyrazolyl)pyridine-3,5-dicarboxylates (2a-g) and diethyl 2,6-dimethyl-4-(3-aryl-1-phenyl-4-pyrazolyl)pyridine-3,5-dicarboxylates (3a-g). RESULTS: Synthesis of a series of new diethyl 1,4-dihydro-2,6-dimethyl-4-(3-aryl-1-phenyl-4-pyrazolyl)pyridine-3,5-dicarboxylates (2a-g) has been accomplished by multicomponent cyclocondensation reaction of ethyl acetoacetate, 3-aryl-1-phenyl pyrazole-4-carboxaldehyde (1a-g) and ammonium acetate. The dihydropyridines 2a-g were smoothly converted to new diethyl 2,6-dimethyl-4-(3-aryl-1-phenyl-4-pyrazolyl)pyridine-3,5-dicarboxylates (3a-g) using HTIB ([Hydroxy (tosyloxy)iodo]benzene, Koser's reagent) as the oxidizing agent. The antimicrobial studies of the title compounds, 2a-g &3a-g, are also described.     

Synthesis and antiproliferative activity of 1,4-bis(dimethylamino)-9,10-anthraquinone derivatives against P388 mouse leukemic tumor cells

A series of 2-substituted-1,4-bis(dimethylamino)-9,10-anthraquinone derivatives were synthesized and their in vitro antiproliferative activities against p388 mouse leukemic tumor cells were evaluated. In addition, the effect of substituents on the phenyl ring was investigated. Among the derivatives tested, seven showed a high antiproliferative effect and three showed a moderate effect. In addition, introduction of a series of substituted phenyl groups into 1,4-bis(dimethylamino)-9,10-anthraquinone at 2-position were shown to enhance its antiproliferative activity. The antiproliferative activity also increased upon substitution of the benzene ring by an electron donating group such as an amine or methoxyl group.     

Synthesis and biological evaluation of some novel 1,4-dihydropyridines as potential antitubercular agents

Recent studies showed that 1,4-dihydropyridine-3,5-dicarbamoyl derivatives with lipophilic groups have significant antitubercular activity. In this study, we have synthesized new derivatives of 1,4-dihydropyridines bearing carbmethoxy and carbethoxy group at C-3 and C-5 of the 1,4-dihydropyridine ring. In addition, 1H-pyrazole ring is substituted at C-4 position. These analogues were synthesized by multi-component Hantzsch reaction. The in vitro antitubercular activity of compounds against Mycobacterium tuberculosis H(37) Rv was evaluated. The lowest minimum inhibitory concentration value, 0.02 μg/mL and SI > 500, was found for dimethyl 1,4-dihydro-4-(3-(4-nitrophenyl)-1-phenyl-1H-pyrazol-4-yl)-2,6-dimethylpyridine-3,5-dicarboxylate 3f, diethyl 1,4-dihydro-4-(3-(4-fluorophenyl)-1-phenyl-1H-pyrazol-4-yl)-2,6-dimethylpyridine-3,5-dicarboxylate 4c and diethyl 1,4-dihydro-4-(3-(4-bromophenyl)-1-phenyl-1H-pyrazol-4-yl)-2,6-dimethyl pyridine-3,5-dicarboxylate 4e, making them more potent than first-line antitubercular drug isoniazid. In addition, these compounds exhibited relatively low cytotoxicity.     

四嗪二甲酰胺抑制肝癌细胞株HepG2增殖并诱导细胞凋亡的研究

目的观察四嗪二甲酰胺(ZGDHu-1)体外抑制肝癌细胞株HepG2增殖并诱导细胞凋亡作用。方法将不同浓度的ZGDHu-1与HepG2细胞在体外培养,用台盼蓝染色、MTT法、5′-溴-2′脱氧尿苷(B rdu)-ELISA法观察ZGDHu-1对HepG2细胞增殖的抑制作用;用细胞形态学、DNA凝胶电泳、DNA含量及细胞周期分析、Annexin-V/PI双标记、Ho-echst33258荧光染色和ELISA法测定DNA片段等技术检测细胞凋亡。结果ZGDHu-1能抑制HepG2细胞增殖和活力,呈现作用时间和剂量的量效关系。HepG2细胞与ZG-DHu-1作用后,大部分细胞阻滞于G2-M期;出现典型的细胞形态改变,DNA片断化,亚G1峰检出并增加,Annexin V+/PI-表达升高,细胞内DNA片段含量增加,Hoechst33258荧光染色后出现凋亡细胞的特征性改变等均证实ZGDHu-1能诱导HepG2细胞凋亡。结论ZGDHu-1能抑制HepG2细胞增殖,并可诱导其细胞凋亡。     

Novel Steroidal 1,4-Diketones and Pyridazine Derivatives as Potential Antiestrogens

A series of steroidal 1,4-diketone derivatives was synthesized by acid-catalyzed condensation of 2-acetylestradiol-17β-acetate with substituted phenylglyoxals. Conversion of the products into the corresponding pyridazine derivatives was achieved by reaction with hydrazine hydrate. The synthesized compounds were evaluated for their uterotrophic, antiuterotrophic, and antifertility activities in mature female albino rats. Among the compounds tested, the phenyl 2 , p-bromophenyl 3 , and p-methoxyphenyl 5 diketone derivatives displayed uterotrophic activity of 72%, 72%, and 91%, respectively. The gradation of antiestrogenic activity was assessed in vivo by the inhibition of the estrone-stimulated uterine growth. Compounds 2–5 showed moderate antiestrogenic activity of 53–56%. None of the tested compounds elicited antifertility activity as assessed by the post-coital antiimplantation activity test.     

Synthesis and cardiovascular properties of furazanyl-1,4-dihydropyridines and of furoxanyl analogues.

A series of furazanyl- and furoxanyl-1,4-dihydropyridines has been synthesized and tested for their cardiovascular activity. The new compounds showed a modest activity in comparison with nifedipine and some selectivity for the myocardial muscle. The most active compound was diethyl 1,4-dihydro-2,6-dimethyl-4-(3-phenyl-4-furoxanyl)-3,5-pyridine dicarboxylate, 4d.     

Synthesis and structure-activity relationships of new arylfluoronaphthyridine antibacterial agents

Novel arylfluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acids have been prepared and their antibacterial activity evaluated. These derivatives are characterized by having a fluorine atom at the 6-position, substituted amino groups at the 7-position, and substituted phenyl groups at the 1-position. The in vitro antibacterial potency is greatest when the 1-substituent is either p-fluorophenyl or o,p-difluorophenyl and the 7-substituent is a 3-amino-1-pyrrolidinyl group. 1-(2,4-Difluorophenyl)-6-fluoro-7-(3-amino-1-pyrrolidinyl)-1,4-dihydro- 4-oxo-1,8-naphthyridine-3-carboxylic acid (38) was found to possess excellent in vitro potency and in vivo efficacy.