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1.
目的:研究7-取代-1-(2-氟乙基)-6,8-二氟-1,4-二氢-4-氧-3-喹啉羧酸的合成及其抗菌活性。方法:通过高温下缩合、环化、亲核取代得到关键中间体,然后通过反应制得目标化合物。选用临床常见的6株致病菌的标准菌株进行体外抗菌活性测定。结果:设计合成11个化合物,均为首次报道。通过IR,^1HNMR和元素分析来确证化合物的结构。体外抗菌活性实验以氟罗沙星为对照品,其中化合物Ⅰ1,Ⅰ2,Ⅱ4的抗菌活性较强。结论:合成的11个化合物中有一些化合物显示较子的抗菌活性,值得进一步深入研究。  相似文献   

2.
目的 合成4-取代的1-[二-(4-氟苯基)甲基]哌嗪化合物。寻找优良的抗偏头痛药物。方法 以盐酸洛美利嗪为先导物,对其哌嗪4位取代基进行修饰。结果和结论 合成了11个未见文献报道的4-取代的合成 1-[二-(4-氟苯基)甲基]哌嗪化合物,结构经IR,^1HNMR,MS及元素分析确证,初步药理筛选结果显示,化合物I1-2,I6-11均有不同程度的钙拮抗活性,其中I2的活性与阳性对照药盐酸洛美利嗪接近。  相似文献   

3.
目的:设计合成6-[4-(4-取代乙酰胺基哌嗪基)苯基]-4,5-二氢-3(2H)-哒嗪酮和6-[4-(4-取代酰胺基哌嗪基)苯基]-5-甲基-4,5-二氢-3(2H)-哒嗪酮两类化合物,寻找作用更强的血小板聚集抑制剂。方法:以乙酰苯胺为原料,经傅克反应、满尼希反应、环合反应、酰化反应合成两类中间体(M)和(N),再经缩合和取代反应得到两类目标化合物,参考Bonn方法进行体外抑制血小板聚集实验。结果:共合成目标化合物12个,其中10个属首次报道,通过元素分析,^1H-NMR确证结构。其中化合物(9)抑制血小板聚集作用的活性最强,为对照物CCI-17810的60多倍;化合物(6)、(7)、(10)、(11)、(12)的活性也优于CCI-17810.结论:目标化合物具有较强的抑制血小板聚集活性。  相似文献   

4.
目的:研究不同含硫侧链的引入对三唑醇类化合物抗真菌活性的影响。方法:设计合成了15个含硫侧链取代三唑醇类化合物,其中13个为新化合物;选择了8种真菌为实验菌株,进行体外抑菌活性测试。结果:目标化合物对所选菌株均有一定的抑制活性,其中化合物2对白色念珠菌的MIC80值为2ug/ml,与氟康唑的活性相当;化合物7和10对白色念珠菌的MIC780值为0.5和0.25ug/ml ,分别为氟康唑活性的4倍和8倍。结论:适当的脂水分配系数对该类化合物体外抑菌活性的影响可能大于立体化学因素的影响。  相似文献   

5.
根据电子等排原理用—NH—代替2,4-二氨基-5-取代苄基嘧啶结构中—CH_2—,合成了10个2,4-二氨基-5-取代苯胺基嘧啶类化合物。测定了它们对大肠杆菌1515的抗菌活性,其中化合物Ⅲ_6(X=3—OC_5H_(11))、Ⅲ_7(X=4—OC_5H_(11))、Ⅲ_8(X=3—OC_6H_(13))、Ⅲ_9(X=4—OC_6H_(13))的体外抗菌活性比TMP稍高。与第一报的10个化合物一起进行定量构效关系的研究,抑制活性与MR_(2,3,4,5)成线性相关。  相似文献   

6.
目的研究具有正丁基和三氮唑侧链结构的三唑醇类化合物的抗真菌活性。方法设计合成了16个1-(1H-1,2,4-三唑-1-基)-2-(2,4-二氟苯基)-3-取代-2-丙醇类化合物,其结构都经过1HNMR和LC-MS确证。选择8种临床常见的真菌为实验菌株,进行体外抑菌活性测试。结果初步的体外抗真菌测试结果表明,所合成的化合物都有一定的抗真菌活性,其中化合物7b、7d、7 e和7 i对除薰烟曲霉菌外7种菌株的抑菌活性优于对照药氟康唑,与伊曲康唑相当。结论引入正丁基和三氮唑侧链的目标化合物都具有一定的抗真菌活性。  相似文献   

7.
为了探索单胺菌素4位甲基上引入电负性不同的吸电子取代基对于抗菌活性的影响,我们合成了四个未见文献报道的单胺菌素化合物(U-1 ̄U-4)。初步体外抑菌试验表明:上述化合物的抗菌活性低于对照品氨曲南。  相似文献   

8.
目的:寻找有-β-受体阻滞活性,且高效低毒的化合物。方法:以β-受体阻滞剂咔唑洛尔为先导化合物,根据药物设计中的结构拼合原理,对其内醇胺侧链进行结构修饰,设计并合成了10个1-(9H-卟唑-4-氧)-3-取代氨基-2-丙醇类化合物V1-V10。结果和结论:所合成的目的物均未见文献报道,结构经红外光谱、核磁共振氢谱、质谱、元素分析或高分辨质谱确证。初步药理筛选结果显示,10个化合物均能够不同程度地拮抗异丙肾上腺素引起的心支过速,其中化合物V1、V3、V4的活性与先导化合物相似。  相似文献   

9.
目的:研究具有正丁基和取代苄基侧链结构的三唑醇类化合物的抗真菌活性。方法:设计并合成了14个1-(1H-1,2,4-三唑-1-基)-2-(2,4二氟苯基)-3-(N-正丁基-N-取代苄基氨基)-2-丙醇化合物,其结构都经过 1H NMR、IR和LC-MS确证。选择8种临床常见的真菌为实验菌株,进行体外抑菌活性测试。结果:体外抑菌测试结果表明,所有化合物对除熏烟曲霉菌外的所有菌株均有一定程度的抑制活性,对深部真菌的抑制活性明显优于浅部真菌。其中化合物6a、6d 和 6j 对石膏样小孢子菌的抑制活性(MIC80 0.015 6 μg/ml)是氟康唑的16倍;化合物6m和6n对白念珠菌的抑制活性(MIC80 0.003 9 μg/ml)是氟康唑的128倍,比其他对照药活性都高。结论:引入正丁基和取代苄基侧链的目标化合物都具有一定的抗真菌活性。  相似文献   

10.
目的:寻找活性强、毒性低的新抗肿瘤化合物。方法:以哌嗪为起始原料,通过与[二-(4-氟苯)]甲基氯反应得到 1-[二-(4-氟苯)甲基]哌嗪Ⅰ,Ⅰ分别通过烷基化、烷基二硫代甲酰化、酰基化和Mannich反应在哌嗪的4-位引入具有抗肿瘤活性的基团,得到 9 个未见文献报道的 1-[二-(4-氟苯)甲基]-4-取代哌嗪衍生物Ⅱa-i。通过SRB法和MTT法测试了它们对 8 种瘤株生长的抑制率。结果:改进了关键中间体Ⅰ的制备方法,使收率由文献的54%提高到74%。初步生物活性实验结果表明, 该类化合物对瘤株 Skov3(人体卵巢癌)较对其它瘤株有较强的抑制率;比较化合物Ⅱc和Ⅱg的结构和活性,可以发现二硫代酯基的存在与否对不同瘤株生长的抑制率有明显影响;4-位引入苄基可使活性有所提高。结论:1-[二-(4-氟苯)甲基]-4-取代苄基哌嗪类化合物值得进一步深入研究。  相似文献   

11.
[目的]设计合成一系列8-烷氧基-6-苯基-[1,2,4]三唑并[4,3-b]哒嗪类化合物(3a3h)和8-苯氧基-6-苯基-[1,2,4]三唑并[4,3-b]哒嗪类化合物(5a3h)和8-苯氧基-6-苯基-[1,2,4]三唑并[4,3-b]哒嗪类化合物(5a5j),并评价其抗惊厥活性.[方法]以4-氨基-[1,2,4]-三唑为起始原料,在160℃条件下与苯甲酰乙酸乙酯熔融环合,而后经过氯代、烷基化等反应合成一系列三唑并[4,3-b]哒嗪类衍生物.应用最大电惊厥实验测定目标化合物的抗惊厥活性.[结果]合成了18个未见文献报道的新型化合物,所有化合物的化学结构均经IR,1 H-NMR和MS方法确证.部分所合成化合物在100mg/kg时表现出一定的抗惊厥活性,其中化合物3c(8-正丁氧基-6-苯基-[1,2,4]三唑并[4,3-b]哒嗪)的抗惊厥活性最强.  相似文献   

12.
三氮唑醇苄胺类化合物的合成及其抗真菌活性   总被引:3,自引:0,他引:3  
依据三氮唑醇类和烯丙胺类化合物的构效关系,合成高效、低毒,广谱的新型抗真菌化合物。方法:设计合成方法并对所合成的化合物用沙氏液法测定其体外最低抑菌浓度。结果:合成了8个新的三氮唑醇苄胺类化合物,8个目标化合物对选用7种病真菌都显示不同程度的抗 力活性,抗深部真菌效果均较好。  相似文献   

13.
Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P < 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (>0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P <0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P < 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.  相似文献   

14.
Objective: To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods: SD rats served as both donors and recipients. 4℃ sodium lactate Ringer's was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava (IVC) inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results: Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion: This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.  相似文献   

15.
目的:评价使用安心颗粒对急诊经皮冠状动脉介入术(PPCI)术后生活质量的影响.方法:将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组(术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次)和对照组(仅接受基础药物治疗).所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表(MIDAS)、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果:入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异(P>0.05);出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低(P<0.05);组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低(P<0.05).两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血(P>0.05).两组发生轻度血小板减少症的患者数比较无差异(P>0.05).结论:PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.  相似文献   

16.
Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P<0.01);the MAP decreased(P<0.01)and the HR increased drastically(P<0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.  相似文献   

17.
Objective:To investigate the gene expression of osteoprotegerin(OPG) and osteoclast differentiation factor(ODF) in the bone tissue of patients with hip fracture due to osteoporosis. Methods:OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers(over 50 years old) with hip fracture(Observer Group) and 30 cases of hip facture sufferers with no osteoporosis(Control group) were analyzed with the Semi-Quantitative RT-PCR method. Results:The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion:Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.  相似文献   

18.
Objective:To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas(SPTP). Methods:Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin(HE) staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results:Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin(9/9 cases), AAT(9/9 cases), NSE(9/9 cases), ACT(7/9 cases), CK20(2/9 cases), CgA(1/9 cases), S-100(3/gcases), PR(4/gcases), Syn(3/9 cases) and CD56(5/9cases), negative in CEA and ER. Conclusion:SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.  相似文献   

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