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1.
In searching for new antimalarial agents ten new compounds of 2,4-diamino-6-[N-(substituted benzyl)-N-(substituted aminomethyl)-amino]-quinazoline have been synthesized. Preliminary screening results showed that only one (Ⅳ6) of these compounds displayed a slight degree of antimalarial activity against plasmodium berghei in mice. The intermediate compound (Ⅰ2) showed suppressive effect on plasmodium berghei in mice and prophylactic activity against plasmodium gallinaceum in chicken. 相似文献
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A series of bis(2,4-diamino-quinazol-6-yl-substituted aminomethyl) aromatic derivatives were synthesized. Compounds Ⅱ1~5 were synthesized by two ways. In the first, 2,4,6-triaminoquinazoline was condensed with the corresponding aryl dialdehydes to form Schiff bases which were reduced with sodium borohydride; the second used a new method in which 2,4,6-triaminoquinazoline was directly condensed with the corresponding aralkyl dihalides to afford the same products. The derivatives Ⅱ6~16 were prepared by formylation, nitrosation or methylation respectively.The inhibition activities of the title compounds on dihydrofolate reductase in rat liver were assayed. The activities of formylated or nitrosated products were 6-9 times, and of methylated products were twofold as active as that of the parent compounds. Ⅱ6, Ⅱ9, Ⅱ10 and Ⅱ14 were nearly as potent as pyrimethamine. Primary antimalarial screening in mice showed that no one possessed significant activity. 相似文献
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Seventeen compounds having the structure of 2,3-diacetoxy-1,4-bis(3′,5′- dioxo-N4′-substituted piperazinyl methyl)benzene were designed and synthesized based on chelation hypothesis. Their antitumor activities on P388 cells,Hep cells and SGC 7901 cells in vitro were tested. Preliminary results showed that compound 4e has potent antitumor effect against P388 cells and.Hep cells in vitro. 相似文献
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In order to search for effective antimyocardial ischemic agents, fourteen new 3 4-[(3-alkylamino-2-hydroxy)propoxy] phenyl(benzyl)]-substituted 4(3H)-quin zolinones (Ⅱ) were synthesized. Substituted o-aminobenzoic acids used as the starting materials were allowed to react with acetic anhydride and then p-aminophenol (method A), or with N- (4- hydroxyphenyl)formamide (method B), or with thionyl chloride and then N - (4 - hydroxybenzyl) formamide (methode C) to form 3-[(4-hydroxyphenyl(benzyl)]-substituted 4(3H)-quinazolinones (Ⅲ). The intermediate Ⅲ reacted with epichiorohydrin to form the epoxides (Ⅳ). The reaction of Ⅳ with an excess of isopropylamine or tert-butylamine in boiling chloroform gave the desired products. Of all the compounds synthesized, Compounds Ⅱ3~5 and Ⅱ13 were found to increase the tolerance of mice to hypoxia. Further evaluation is in progress. 相似文献
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In searching for new chelation therapy drugs against uranium intoxication, a series of N-carboxymethyl-N-(substituted carbamoylmethyl)-2, 3-dihydroxy-5-carboalkyloxybenzylamine was synthesized starting with 2, 3-dihydroxy-5-carboalkyloxybenzylamine diacetic acid. The effect on the elimination of uranium salts from animal bodies was tested. Four of them (Ⅳn, Ⅳq, Ⅳu and Ⅳv) were shown to be more effective than tiron or phosphicine in accelerating uranium excretion in rats. 相似文献
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Synthesis of 35 new compounds of α-chloro-β-(5-nitro-2-furyl) acrylamides and 5-[α-chloro-β-(5-nitro-2-furyl ) vinyl]-oxadiazoles by known methods are reported. In preliminary test in mice 10 compounds were found to possess pronounced activity against Schistosomiasis japonica. Among these Ⅰ12, Ⅰ13, Ⅰ14, Ⅰ20, Ⅱ1 and Ⅱ8 were shown to be the most effective. 相似文献
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1-氨基-6-氟-1,4-二氢-4-氧代-7-(取代)哌嗪基-3-喹啉羧酸及其衍生物的合成与抗菌活性 总被引:1,自引:0,他引:1
The title compounds 6~24 were obtained by the reaction of 5 with corresponding benzaldehydes. 5 wes prepared with ethyl 7-chloro-6-fluoro-1, 4-dihydro-4-oxo-3-quinolinecarboxylate by hydrolysis, amination and condensation with piperazine. Anti—bacterical activities of 5~24 were tested in vitro. 相似文献
8.
2,4-Diamino-6-substituted amino sulfonyl quinazolines generally were prepared by refluxing 2,4-diamino-6-chloro-sulfonylquinazoline sulfate with suitable amines in dilute ethanol. For 2,4-diamino-6-(2-pyridy) amino sulfonyl quinazoline, it was prepared in dry pyridine. Compounds Ⅰ2, Ⅰ9 and Ⅰ10 were shown to be more active against chloroquine resistant strain of P. berghei than sensitive strain. Compounds Ⅰ2, Ⅰ12 and Ⅰ13 showed prophylactic action against P. yoelii. 相似文献
9.
Four stereoisomers of 2-amino-3-(1,2-dicarboxyethylthio) propanoic acid were prepared by reaction of L- and D-cysteine with fumaric acid. The absolute configuration of the diastereoisomer of 2-amino-3-(1,2-dicarboxyethylthio) propanoic acid from Amanita pantherina were assigned as (2R, 1'R) and (2R, 1'S) by analysis of the optical properties. Pharmacological tests showed that all of the four stereoisomers inhibited the depolarization of NMDA on spinal motorneurones in newborn rats, The inhibition intensity of L-A,D-A and D-B were higher than that of L-B. 相似文献
10.
Ten 4-nitrodiphenylether-4′-thiocarbamides were synthesized from 4-nitro-4′-thiocyanodiphenylether and corresponding amines. Preliminary screening data in table 1 showed that most of them exhibited insignificant or low activity against schistosoma japonicnm in mice, while V9 with a diethyl substituted nitrogen in thiocarbamide structure was found to possess antischistosomal activity as high as that of nithiocyamine (Amoscanatec9333 GO/COP 4540). 相似文献
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In the present investigation, 4-hydroxy-3-methylacetophenone, on condensation with appropriate aldehydes in methanolic potassium
hydroxide solution, yielded the corresponding chalcones (CI-XI). These corresponding chalcones were reacted with phenyl hydrazide in glacial acetic acid, which led to the formation of
novel 4-[5-(substituted phenyl)-1-phenyl-4,5-dihydro-1H-3-pyrazolyl]-2-methylphenol derivatives. All newly synthesized compounds were evaluated for their antimycobacterial activities
against isoniazid-resistant Mycobacterium tuberculosis using agar dilution. 4-[5-(4-Fluoro phenyl)-1-phenyl-4,5-dihydro-1H-3-pyrazolyl]-2-methylphenol showed good antimycobacterial activity, with a minimum inhibitory concentration of 0.62 μg/ml. 相似文献
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前报报道在“催醒安”的对位异构体的苯环上引入烷基,可以增强对胆碱酯酶的抑制作用。为了探索在邻位异构体(Ⅰ)的苯环上引入烷基对生理活性的影响,合成了二甲氨基甲酸-[2-(2-二甲氨基)乙氧基-4(或5)-特丁基]苯酯(Ⅱ)。 相似文献
17.
Y. W. Kim Y. K. Kim J. Y. Lee K. T. Chang H. J. Lee D.-K. Kim 《Xenobiotica; the fate of foreign compounds in biological systems》2013,43(3):325-339
The authors investigated the pharmacokinetics and metabolism of 3-((5-(6-methylpyridin-2-yl)-4-(quinoxalin-6-yl)-1H-imidazol-2-yl)methyl)benzamide (IN-1130), a novel ALK5 inhibitor, which suppresses renal and hepatic fibrosis, and also exerts anti-metastatic effects on breast cancer-bearing MMTV-cNeu mice model. Plasma half-lives of orally administered IN-1130 were 62.6 min in mice, 76.6?±?10.6 min in dogs, 156.1?±?19.3 min in rats, and 159.9?±?59.9 min in monkeys. IN-1130 showed a high apparent permeability coefficient (Papp) of (45.0?±?2.3)?×?10?6 cm s?1 in in vitro permeability tests in a Caco-2 cell monolayer model. The bioavailability of orally administered IN-1130 was 84.9% in dogs and 34.4% in monkeys (oral dose, 5.5 mg kg?1), 11.4% in rats and 8.95% in mice (oral dose, 50.3 mg kg?1), respectively. Orally given IN-1130 was readily distributed into liver, kidneys and lungs. The major metabolite of IN-1130 (M1) was detected in the systemic circulation of rat and mouse and was purified and tentatively identified as 3-((4-(3-hydroxyquinoxaline-6-yl)-5-(6-methylpyridine-2-yl)-1H-imidazol-2-yl)methyl)benzamide or 3-((4-(2-hydroxyquinoxalin-6-yl)-5-(6-methylpyridine-2-yl)-1H-imidazol-2-yl)methyl)benzamide. The highest levels of M1 were found in liver. The results of this study suggest that IN-1130 has the potential to serve as an effective oral anti-fibrotic drug. 相似文献
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Sasikala R Thirumurthy K Mayavel P Thirunarayanan G 《Organic and medicinal chemistry letters》2012,2(1):1-13