共查询到20条相似文献,搜索用时 62 毫秒
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以6-氯-3-吡啶甲醛为原料, 通过多步反应合成了一系列3-(吗啉吡啶基)-5-取代异噁唑类化合物, 并用IR, 1H NMR, 13C NMR和MS进行了结构确证. 这些化合物均以异噁唑为母核, 具有近似的平面结构, 在异噁唑环的3-位引入吗啉吡啶基, 而在5-位引入酯基、取代氨基、三唑环和噁唑烷酮环. 研究了这些化合物对金黄色葡萄球菌、耐甲氧西林金黄色葡萄球菌、表皮葡萄球菌、粪肠球菌和大肠杆菌的抑制活性, 发现与噁唑烷酮类上市药物利奈唑胺相比, 目标化合物均显示出更低的抗菌活性, 最低抑制浓度(MIC)大于32 mg/L, 这些试验结果表明异噁唑母核的5-位缺乏sp3杂化结构, 可能会导致抗菌活性的显著降低. 相似文献
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利用丙酮和草酸二乙酯为原料,通过Claisen酯缩合、肟化环合与氨水氨解,合成磺胺甲基异噁唑的关键中间体——5-甲基-3-异噁唑甲酰胺。通过红外光谱、核磁共振、熔点测定等方法验证其结构。本实验综合运用有机合成、产物分离和结构鉴定中的多种操作单元,并训练红外光谱、核磁共振等常用仪器分析技术,适合学生进行综合有机化学实验。 相似文献
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穆赫塔尔·伊米尔艾山 《合成化学》2007,15(4):430-433
3-(1′,2′-二-O-环己叉二氧乙基)异噁唑啉盐(2)与MeMgBr(或在二异丙基胺和正丁基锂存在下与乙酸乙酯)进行亲核加成反应合成了2,3-二甲基-3-(1′,2′-二-O-环己叉二氧乙基)-4,5-二氢异噁唑(3)[或2-甲基-3-(乙氧羰甲基)-3-(1′,2′-二-O-环己叉二氧乙基)-4,5-二氢异噁唑(4)]。3和4经MPLC拆分得到了非对映体3a,3b,4a和4b,其结构经1HNMR,13C-NMR,IR和元素分析表征。 相似文献
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以邻苯二甲酰胺为原料,经4步反应合成了1-N-甲基哌嗪基-2-羟基丙胺,其结构经NMR和MS表征,总收率34.3%。 相似文献
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Clive L. Branch Drake S. Eggleston R. Curtis Haltiwanger Arun C. Kaura John W. Tyler 《合成通讯》2013,43(11):2075-2084
The title compound has been prepared in three steps from 2-methylthiosemicarbazide following acylation, cyclisation and cation exchange chromatography. It was fully characterised by the usual spectroscopic means as well as by 15N nmr spectroscopy and X-ray crystallographic analysis. 相似文献
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标题化合物C1 5H1 6NO3由苯甲醛、醋酸铵、乙酰乙酸乙酯、麦氏酸在微波辐射下干反应而得。结构通过单晶X 射线衍射法测定 ,其晶体属单斜晶系 ,空间群P1 ,a =7.870 (1 ) ,b =9 2 90 (1 ) ,c=1 0 .640 (2 ) ,α =1 0 2 .76(3) ,β =1 1 0 .42 (3) ,γ =96.92 (3)°,V =694.2 (2 ) 3,Z =2 ,Mr=2 59.30 ,Dc=1 .2 4 0 g/cm3,μ(MoKα) =0 .0 86mm- 1 ,F(0 0 0 )=2 76。晶体结构用直接法解出 ,经用全矩阵最小二乘法对原子参数进行修正 ,最终的偏离因子为R =0 0 4 2 3,wR =0 .1 2 57。在晶体结构中 ,吡啶酮环与苯环之间的二面角为 87.31°。 相似文献
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Hydrophilic 2- hydroxy-3-methyl-4-pyridinone derivatives were acylated with either long chain acid chlorides or with 1,3,5-benzenetricarbonyl trichloride. The products are either partially lipophilic, bidentatate or hexadentate chelators that form strong 3:1 and 1:1 complexes, respectively, with Fe (III). 相似文献
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A. A. Krauze É. É. Liepin'sh Yu. É. Pelcher Z. A. Kalme I. V. Dipan G. Ya. Dubur 《Chemistry of Heterocyclic Compounds》1985,21(1):77-83
The condensation of ethyl arylidenacetoacetate with cyanothioacetamide and of arylidenecyanothioacetamides with ethyl acetoacetate or of arylidenecyanothioacetamides with ethyl -aminocrotonate gave 3-cyano-4-aryl-5-ethoxycarbonyl-6-methyl-3,4-dihydropyridine-2-thiones. PMR spectroscopy showed that the 3-cyano-4-aryl-3,4-dihydropyridine-2-thiones are formed as a mixture of cis and trans isomers.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 95–102, January, 1985. 相似文献
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The known but long-neglected compound HODhat was shown to be in certain situations a useful peptide coupling additive. Uronium and phosphonium salts with HODhat built into the system were also useful stand-alone coupling reagents. Comparisons with related additives and coupling reagents showed that the new systems were sometimes more and sometimes less effective than previously described systems in the case of stepwise and segment couplings. Applications to assembly of the model decapeptide ACP showed that HDATU was far more effective than HDTU and more effective than HATU under some conditions. 相似文献
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A. A. Smolyak L. D. Konyushkin S. I. Firgang Yu. V. Shklyaev 《Russian Journal of Organic Chemistry》2016,52(12):1812-1816
The reaction of a natural allylbenzene, myristicin, with nitriles afforded a series of 7,8-dihydro-[1,3]dioxolo[4,5-g]isoquinoline and 6,7-dihydro[1,3]dioxolo[4,5-h]isoquinoline derivatives. 相似文献