衍生物
- 与 衍生物 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The macro conjugated molecule fluorene derivative has 2, 3, 6, 7-tetraamino-9, 9'-dialkyl fluorene as a raw material which is added to an organic solvent respectively together with phenanthrenequinone, acenaphthene quinone or bis-carbonyl pyrene derivatives and strong base; under the protection of inert gas, reflux reaction is carried out to the materials, so as to prepare a series of trapezoidal conjugated molecules containing fluorine structures.
本发明涉及一类含大共轭分子的芴衍生物及其制备方法,大共轭分子芴衍生物是将原料2,3,6,7-四氨基-9,9'-二烷基芴,分别与菲醌、苊醌或二羰基芘的衍生物以及强碱加入到有机溶剂中,在惰性气体的保护下,回流反应制得一系列含有芴结构的梯形共轭分子。
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There are 65 species of Chinese herbs with confirmed anti-HBV activityd, in which 16 probable active constituents are pointed out. They are arene, ketone derivatives, alicyclic carboxylic acid, aromatic carboxylic acid, ester, lactone, cyanide derivatives, heterocycle derivatives, carotenoids, anthraquinones, flavonoids, vegetable tannin, alkaloid, terpenoids, steroids and protein. Among them, the complexes of flavonoids, terpenoids, steroids and alkaloids are more abundant.
确定了具有抗乙肝病毒活性的中草药品种65种,其中含可能活性成分共16种,即芳烃、酮类衍生物、脂环族羧酸、芳香族羧酸、酯、内酯、氰类衍生物、杂环衍生物、类胡萝卜素、蒽醌类、黄酮类、植物鞣质、生物碱、萜类、甾类和蛋白质,而16种中以黄酮类、萜类、甾类和生物碱类成分为多。
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The average relativeerror was 3.63%, less much than mostly used group-contribution methods for alkyne, chlorine derivative, iodine derivative, especially for alkane, bromine derivative, aromatic hydrocarbon, alicyclic hydrocarbon and sulfur-containing organic compounds.
对4068种有机物的正常沸点进行了估算,其平均相对误差为3.63%,总体估算精度明显优于相比较的基团贡献法,对炔烃、氯衍生物、碘衍生物,尤其是对烷烃类、溴衍生物、芳烃、脂环烃和含硫化合物的估算误差明显减小。
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According to results of cantharidin structure-activity relationships, a series of cantharidin derivatives for the first time were designed, synthesized and characterized by IR, NMR and elemental analysis.
用IR、〓H NMR初步证实了斑蝥素衍生物和DCC生成稳定中间体是使含有芳香羧酸的斑蝥素衍生物与氨基葡萄糖及其衍生物不能进行反应的主要因素。
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The rubber compound comprises a rubber which has at least two functional groups which can be cross-linked by hydrosilylation, a cross-linking agent consisting of hydrosiloxane or a hydrosiloxane derivative or a mixture of several hydrosiloxanes or derivatives, which comprise at least two SiH-groups per molecule in the centre, a hydrosilylation catalyst system, at least one filling material and a coagent which can be cross-linked by hydrosilylation.
为此该橡胶混配物包括:具有至少两个可通过氢硅烷化交联的官能团的橡胶;作为交联剂的氢硅氧烷或氢硅氧烷衍生物或者由数种氢硅氧烷或其衍生物组成的混合物,所述氢硅氧烷或其衍生物平均每个分子具有至少两个SiH基团;氢硅烷化催化剂体系;至少一种填料;和可通过氢硅烷化交联的助剂。
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Synthesis of organic sulfuric compounds in aqueous media is carried out by: using thio-olefin compounds with carbonyl compounds, acetal/keltone, hydrazone, oxime, osazone and enamine to synthesize mercaptal/keltone compounds in aqueous media; using thio-olefin compounds with alpha-hydroxyaldehyde/keltone or alpha-halogenated aldehyde/keltone to synthesize thia-olefin derivatives in a queous media; using thio-olefin compounds with alpha, beta-unsaturated hydroxy compounds, C-C treble bond, C-N treble bond, C-C double bond, N-N double bond, C-N double bond, C-S double bond, epoxy and its derivatives, aziridine and its derivatives, cyclopropane and its derivatives and halogenated carboxy to synthesize sulfoether compounds in a queous media.
含水介质中有机硫化合物的合成方法,本发明属于有机合成方法,用硫缩烯酮类化合物与羰基化合物、缩醛/酮、腙、肟、脎、烯胺在含水介质中合成缩硫醛/酮化合物,与α-羟基醛/酮或α-卤代醛/酮在含水介质中合成噻烯类衍生物,与α,β-不饱和羰基化合物、碳碳叁键、碳氮叁键、碳碳双键、氮氮双键、碳氮双键、碳硫双键、环氧乙烷及其衍生物、氮杂环丙烷及其衍生物、环丙烷及其衍生物、卤代烃等在含水介质,中合成硫醚化合物。
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In addition, two water-solublephosphonic acid derivatives of C〓 and two diadducts of phosphonate derivative of C〓were also prepared. All the four compounds can be dissolved in DMSO, which is asolvent easy to be soluble in water. Their DMSO aqueous solution could haveprospective applications in the field of biomedicine.
研究了富勒烯膦酸酯衍生物的水解反应,首次合成了两个水溶性富勒烯膦酸衍生物,另外还合成了两个二加成的富勒烯膦酸酯衍生物,这四个衍生物均能很好地溶解在和水互溶的DMSO中,它们的DMSO水溶液可能在生物医学研究中可能会有很好的应用价值。
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Bis (P—bromobenzylamino) ethane and 1,2—bis (m—Iodobenzylamino) ethane may be prepared by condensation of the corresponding halo benzaldehyde with ethylenediamine and followed by catalytic hydrogenation of the Schiff's bases over Pto_2 in glacial acetic acid solutions: Both Ⅱa and Ⅱb may react in neutral mediam with aldehydes to form well—defined crystalline tetrahydro—imidazole, which may be served as derivatives of identification for aldehydes: Under the same condition, however,Ⅱb may ...
用1,2-二乙烷与二十余种醛类作用,得到有固定熔点的晶体衍生物,它们的熔点分布在85—210℃之间,产率为40—96%,这试剂与甲基酮类在相同条件下无反应,因此,它可作为鉴定醛类的专属试剂。 2。上述衍生物用稀盐酸在室溫处理,能发生水解,可以定量地收回原来的醛,因此这试剂又可作为分离醛类的试剂。 3。上述衍生物可以用非水滴定法半微量地测定其分子量可作为鉴定醛类的另一项参考数据。 4.1,2-二乙烷与醛类能生成晶体衍生物,但这试剂也与甲基酮在同样条件下发生反应,所以不适合作为鉴定醛类的专属试剂。
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Respectively, glutamic acid derivatized β-CD has been synthesized with epoxy chloropropane as the intermediate, a water-insoluble yellow liquid was got after the acetylating of the by using acetic anhydride, which was used as a novel gas chromatographic CSP; A water-soluble β-CD polymer cross-linked with epoxy chloropropane has been synthesized, and the derivatives of β-CD polymer were synthesized by its alkylating and acetylating. The different β-CD derivatives were coated on silica capillary columns by dynamic method, the chromatographic properties and retention behaviors of the fused silica capillary columns were studied, the results showed that the β-CD derivatives had good stereoselectivity and separation results to some compounds, especially to various positional isomers and enantiomers.
本文还分别以环氧氯丙烷为中间体,合成了七{2,6-二-O-[3-(1,3-二羟基丙氨酸)]}-β-环糊精,再用醋酸酐将其乙酰化,得到了一种淡黄色粘稠液体,合成了一种新型的环糊精衍生物;以环氧氯丙烷作交联剂合成了一种水溶性的β-环糊精聚合物,再将其烷基化和酰基化,合成了β-环糊精聚合物的不同衍生物,用动态法将不同类型的β-环糊精衍生物涂渍在石英毛细管柱上,通过对所制备柱柱性能的测试和对一系列化合物的分离和保留行为的研究,结果表明所合成的β-环糊精衍生物对各类化合物,特别是对位置异构体和对映异构体具有较好的分离效果,显示了很强的立体选择性。
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A one-step method for the synthesis of aromatic indolizine derivatives byintramolecular 1,5-dipolar cyclization reaction of 2-(2-arylethenyl)pyridinium N-ylidesin the presence of an oxidant has been studied for the first time. In the presence ofelectron-deficient olefins, however, 2-(2-phenylethenyl)pyridinium N-ylides underwent1,3-dipolar cycloadditions and then aromatized in situ by TPCD to produce indolizinederivatives, indicating 1,3-dipolar cycloaddition proceed more readily than 1 ,5-dipolarcyclization in these conditions. Pyridinium disubstituted N-ylides, readily obtainedfrom corresponding pridinium and β-chlorovinyl ketone, underwent thermalintramolecular 1,5-dipolar cyclization to give indolizine derivatives easily.Indolizinecarbaldehyde derivatives were synthesized starting from 2-pyridinecarbaldehyde in four-steps involving 1,3-dipolar cycloaddition reaction.
本文首次研究了2-(2-芳基乙烯基)吡啶N-叶立德在氧化剂存在下的分子内1,5-偶极环化反应,采用一锅法合成了中氮茚衍生物;研究了这些N-叶立德的1,5-偶极环化和1,3-偶极环加成反应的选择性,发现当有缺电子烯烃存在时,优先进行1,3-偶极环加成反应,而不再发生分子内1,5-偶极环化反应;由β-氯乙烯酮方便地得到了烯丙基N-叶立德,他们在加热时进行分子内1,5-偶极环化反应而得到中氮茚衍生物;由2-吡啶甲醛为起始原料,通过1,3-偶极环加成反应等四步反应,得到了重要的中氮茚甲醛衍生物,这些反应都具有条件温和和操作简便的特点,是合成中氮茚衍生物的新方法。
- 推荐网络例句
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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.
另一方面,更重要的是由于城市住房是一种异质性产品。
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Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.
气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。
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You rap, you know we are not so good at rapping, huh?
你唱吧,你也知道我们并不那么擅长说唱,对吧?