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顺-1-环己基-3-酰氨基-4-取代苯基-2-氮杂环丁酮的合成 总被引:1,自引:0,他引:1
以取代苄叉氨基环己烷与Dane盐环化制备了23种新的单环β-内酰胺类化合物-顺-1-环己基-3-酰氨基-4-取代苯基-2-氮杂环丁酮. 并测定了合成的氮杂环丁酮类化合物的抗菌活性和抑制β-内酰胺酶的活性. 相似文献
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2-(N-三氟乙酰-N-三甲基硅烷基)氨基-3-三甲基硅烷氧基-羧酸三甲基硅烷酯和2-(N-三氟乙酰)-2,3-脱氢氨基酸的合成 总被引:2,自引:0,他引:2
利用三氟甲基磺酸三甲基硅烷酯, 我们合成了一种新的、化学活性很高的合成中间产物2-(N-三氟乙酰-N-三甲基硅烷基)氨基-1, 1-二(三甲基硅烷氧基)乙烯。脂肪醛或芳香醛发生碳碳成键的加成反应, 生成β碳原子上带有易离去基团三甲基硅烷氧基、N原子上带有保护基团三氟乙酰基的α氨基酸三甲基硅烷酯。消除反应得到了一个合成α、β脱氢氨基酸的可行途径。这类化合物是合成复杂多肽和肽生物碱的基元物。 相似文献
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1-取代-1-(1,2,4-三唑-1-基)频那酮的改良合成 总被引:1,自引:0,他引:1
在四烷基铵卤化物的液-液相转移催化作用下, 从α-三唑基频那酮和卤代烃合成了1-取代-1-(1,2,4-三唑-1-基)频那酮. 后者具有植物生长延缓活性和抗菌活性. 相似文献
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酰胺基硫脲及其相关的杂环衍生物的研究 V:1-(β-吗啉丙酰基)-4-芳基氨基硫脲及其相关杂环衍生物的合成 总被引:2,自引:0,他引:2
研究了β-吗啉丙酰肼和一系列芳基异硫氰酸酯间的反应. 获得六个1-吗啉丙酰基-4-芳基氨基硫脲类化合物, 其中一些被环化得到5-吗啉乙基-4-芳基-三唑啉-5-硫酮和2-芳胺基-5-(β-吗啉乙基)-1,3,4-噻二唑. 这里有些化合物具有植物生理活性和抗结构活性. 相似文献
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合成了一系列的1-芳基-1,4-二氢-3-芳酰肼基甲酰基-各甲基斗哒嗪酮类化合 物,并用离体黄瓜子叶生根法测试其生物活性,生测结果表明,所有的化合物均显 示出一定的生物活性,并且芳环上的取代基对活性有重要影响.采用化合物的物理 化学参数及化合物促进黄瓜子叶生根的活性,进行了结构与活性定量关系研究,建 立了较好的结构与活性的相关式,化合物的亲脂性和取代基的电性对化合物的生物 活性具有重要的影响.研究结果对3-芳酰肼基甲酰基斗哒嗪酮类化合物的改性或新 类似物的合成具有指导意义. 相似文献
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本文报道了十六个标题化合物(即β-内酰胺单环衍生物)的立体专一性合成。以Dane盐1和亚胺2为原料,在氯甲酸乙酯和三乙胺存在下缩合成β-内酰胺环,该环合反应安全、方便,生成顺式构型产物。十六个化合物中,有五个具有抑制β-内酰胺酶的活性。 相似文献
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Donald D. Clarke Herman Gershon John J. McMahon 《Monatshefte für Chemie / Chemical Monthly》2000,131(7):795-798
Summary. 2-Acetamido-5,6-dihalophenyl acetates were synthesized as intermediates for the preparation of 6, 7-dihalo-8-quinolinols
via the Skraup procedure.
Received January 24, 2000. Accepted February 12, 2000 相似文献
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6-取代苯并噻唑-2-氨基硫代磷酸二烷基酯的合成 总被引:1,自引:0,他引:1
用6-位取代的2-氨基苯并噻唑与三氯硫磷反应,合成了3个苯并噻唑-2-氨基硫代磷酰二氯,并由此合成了9个苯并噻唑-2-氨基硫代磷酸二烷基酯.讨论了苯并噻唑环上取代基对反应的影响和产物中硫代磷酸酯的烷基的空间效应对反应的影响.所合成的部分化合物对人喉鳞状细胞癌(Hep-2)具有一定的抑制能力. 相似文献
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Time-resolvedcircularlypolarizedluminescence(CPL)studieshavebeenparticularlysuccessfulatmeasuringdifferencesinquenchingrateconstantsincertaindiastereomericdonor-acceptorsystems'ItisanticipatedthatthesetypesofexperimentsmaybeappliedtomorecomplexsystemsinvolvingracemiclanthanideemittercomplexesinasolutioncontainingtransitionmetalcomplexesenantioselectivelyboundtoDNA2.However,theluminophoreswereonlyconfinedtoLn(DPA),'-andLn(CDA),'(Ln=Eu' ,Tb' ,DPA=dipicolinatedianion,CDA=chelidamate).Eff… 相似文献
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Hong Yang Longya Xu Dechun Ji Qingxia Wang Liwu Lin 《Reaction Kinetics and Catalysis Letters》2002,76(1):151-159
In the present paper, the catalytic dehydrogenation of C2H6 to C2H4 under non-oxidative conditions was investigated in a fixed-bed micro-reactor under ambient pressure at 823 - 923 K. The 6Cr/g-Al2O3 catalyst was found to be the best catalyst among the g-Al2O3, SiO2, MCM41, MgO and Si-2 supported chromium oxide catalysts. The features of the 6Cr/g-Al2O3 catalyst for the reaction could be listed as follows: (1) At 823 - 923 K, the C2H4 selectivity of 92.5-78.6% at a C2H6 conversion of 9.5-29.8% could be obtained. (2) The catalyst had the good regeneration performance, i.e., could be regenerated by air repeatedly. (3) The main products were C2H4, CH4, H2 and coke. No carbon oxides were identified. 相似文献
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Diethyl 6-amino-2-hydroxyazulene-1,3-dicarboxylate ( 6a ) and 2-acetoxyl derivative ( 6b ) were synthesized by reduction of the 6-azido derivatives ( 5a,b ) with zinc/acetic acid in excellent yields. 5a and 5b were prepared by azidation of diethyl 2-acetoxy-6-bromoazulene-1,3-dicarboxylate (4). Diazotization of 6a with sodium nitrite in the presence of concentrated sulfuric acid in dioxane gave diethyl 2-hydroxy- ( 7a ), 2,6-dihydroxy- ( 8a ), and 2-hydroxy-6-[2-(2-hydroxyethoxy)ethoxy]-azulene-1,3-dicarboxylates ( 9a ), in 5, 35 and 20% yields, respectively. Similar reaction of 6b gave the corresponding acetates 7b, 8b , and 9b , compounds of the same type from 6a . No evidence for the formation of 6-diazo-1,3-diethoxycarbonyl-2(6H) azulenone ( 2b ) was obtained in the employed reaction conditions. 相似文献
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XiaoYunLI QiongZHENG PengYU ChiHUANG JianLiDUAN JunQingPENG 《中国化学快报》2004,15(8):895-898
An effective synthetic route for preparation of 2-chloro-6-fluorobenzonitrile, 2-chloro-6-fluorobenzamide and 2-chloro-6-fluorobenzoic acid has been described. It includes diazotization,fluorination, ammoxidation and hydrolysis reactions. 相似文献
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通过室温固相反应合成了Ni2P2S6层次结构材料,并经XRD和Raman光谱为进行了表征。与传统的高温固相反应法相比,该法具有反应速度快,能耗低,可得均相产物的优点。TG-TDA研究表明,Ni2P2S6在空气中热氧化的终产物为Ni2P2O7, 间态可能是Ni2P2O亚稳相。 相似文献
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吡啶-2,6-二甲酸经酯化,肼解得吡啶-2,6-二甲酰肼(2),(2)与芳香醛缩合得到了3个新的酰腙配体:吡啶-2,6-二甲酰肼苯甲醛腙(3a)、吡啶-2,6-二甲酰肼水杨醛腙(3b)和吡啶-2,6-二甲酰肼呋喃甲醛腙(3c),其结构经元素分析、IR、1HNMR和MS进行了确认。制备了吡啶-2,6-二甲酰肼与这三种新型配体的Tb(III)和Eu(III)配合物,并对配合物的溶液态的荧光性质进行了研究。结果表明,吡啶-2,6-二甲酰肼苯甲醛腙(3a)和吡啶-2,6-二甲酰水杨醛腙(3b)作为荧光敏化剂,对Eu3+和Tb3+的荧光敏化性能比吡啶-2,6-二甲酰肼以及大多数吡啶-2,6-二甲酸衍生物要好,是较理想的稀土荧光敏化剂,它们的稀土配合物在分子偶极矩较小的溶剂中荧光强度较强。 相似文献
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Elżbieta Wyrzykiewicz Sebastian Mielcarek Anna Migoń Jolanta Badura 《Phosphorus, sulfur, and silicon and the related elements》2013,188(4):811-823
Nine new ortho -( meta - and para -) substituted derivatives of 2-benzylthio-5-bromo-6-methyluracils have been prepared. EI induced mass spectral fragmentation of these compounds was investigated. Fragmentation pathways are proposed on the basis of accurate mass and metastable transitions measurements. The correlation between the intensities of the M +. and the selected fragment ions of these compounds is discussed. 13 C NMR spectra of these compounds were assigned. The data derived from EIMS and 13 C NMR spectra can be used to differentiate the isomers. 相似文献