2-取代苯甲酰氨基-5-苯甲叉基-4-噻唑酮衍生物的合成与生物活性研究

选择硫脲为起始原料,与溴乙酸乙酯一步反应生成2-亚氨基-4-噻唑烷酮(2),与苯甲醛缩合得2-氨基-5-苯甲叉基-4-噻唑酮(3),再与取代苯甲酰氯反应,合成了7个未见文献报道的噻唑酮类化合物.通过IR,1 H NMR,13 C NMR和元素分析对目标化合物进行了结构鉴定,测定了它们的抗肿瘤活性和杀菌活性.结果表明:部分测试化合物对肿瘤细胞KB和CNE2有一定的抑制作用,化合物4a对6种病菌都有不同程度的抑制活性.     

无溶剂合成2-氨基噻唑和2-甲基噻唑衍生物

在无溶剂和催化剂的条件下,以卤代酮和硫脲或取代硫脲为原料,于100℃反应5～15 min,合成了2-氨基噻唑及2-甲基噻唑类衍生物.在明显减少硫脲或取代硫脲用量的基础上,使产物的收率达到了85%～98%.此方法具有反应条件温和、操作简单、反应时间短和收率高等特点.     

4-取代苯甲酰氧基-2-取代苯甲酰氨基噻唑衍生物的合成与生物活性

以商品化的杀菌剂噻唑菌胺和噻氟酰胺为先导,保持噻唑环活性结构,在噻唑环的4位引入酯基,设计合成了9个新型的4-取代苯甲酰氧基-2-取代苯甲酰氨基噻唑衍生物,中间体2-亚氨基-4-噻唑烷酮由简便易得的原料溴乙酸乙酯与硫脲一步合成.用IR、1H NMR、13C NMR、MS和元素分析等对合成的噻唑酰胺化合物结构进行了表征.并对其杀菌和抗肿瘤生物活性进行了测试,初步的研究结果表明,该类化合物基本上没有抗肿瘤活性,但部分化合物对小麦赤霉病和黄瓜灰霉病有较好的抑制效果.     

4-噻唑酮羧酸衍生物的合成

合成了具有潜在杀菌活性的3-苯基-5-苯亚甲基-2-苯氨基噻唑-4-酮的羧酸衍生物.以邻乙基苯胺为原料,合成中间体N,N′-二(2-乙基苯)硫脲(Ⅰ)和2-(2-乙基)苯基-3-(2-乙基)苯基噻唑-4-酮(Ⅱa),化合物Ⅱa与不同的底物醛发生缩合反应生成2-(2-乙基)苯基-3-(2-乙基)苯基-5-苯亚甲基噻唑-4-酮(Ⅲ),化合物Ⅲ经过加成反应和水解反应,得到目标化合物.同时以二苯基硫脲为原料合成一个类似物,共合成3种3-苯基-5-苯亚甲基-2-苯氨基噻唑-4-酮的羧酸衍生物.产物经核磁共振谱、质谱表征,产物纯度采用高效液相色谱法测定,均大于98%.     

N'-(2-羟基-4-甲基-苯甲酰胺基)-2-亚胺基-4-噻唑烷酮的合成及生物活性

为探讨4-噻唑烷酮衍生物的生物活性,用4-甲基水杨酸甲酯和水合肼作为原料反应得到4-甲基水杨酰肼,再将其与硫氰酸钾合成得4-甲基水杨酰氨基硫脲,最后与溴代乙酸乙酯反应合成终产物N'-(2-羟基-4-甲基苯甲酰胺基)-2-亚胺基-4-噻唑烷酮.对其进行了~(13)C NMR、IR、~1H NMR和元素分析表征,并对该化合物进行了体内抗炎活性和体外抗菌活性的测试.结果表明:该化合物具有较好的抗炎和抗菌活性.     

N'-(2-羟基-5-溴苯甲酰胺基)-2-亚胺基-4-噻唑烷酮的合成及生物活性

以5-溴水杨酸为原料,将其与水合肼反应生成了5-溴水杨酰肼,再将硫氰酸钾与5-溴水杨酰肼反应合成了5-溴水杨酰基氨基硫脲,后者与溴代乙酸乙酯反应生成了终产物N'-(2-羟基-5-溴苯甲酰胺基)-2-亚胺基-4-噻唑烷酮.对化合物进行了熔点、IR、元素分析、1H NMR、13C NMR表征,并测试了其对生物体的抗炎活性和抗菌活性.结果表明:N'-(2-羟基-5-溴苯甲酰胺基)-2-亚胺基-4-噻唑烷酮具有较好的抗炎、抗菌活性.     

N-酰基-(R)-四氢噻唑-2-硫酮-4-羧酸乙酯与外消旋氨基酸的反应

N-乙酰基-（R）-四氢噻唑2-硫酮-4-羧酸乙酯及N-苯甲酰-（R）－四氢噻唑-2-硫酮-4-羧酸乙酯同外消旋的两氨酸、蛋氨酸、本现氨酸、亮氨酸反应，得到光学活性N-酰基氨基酸2a～f及光学活性氨基酸3a～f。     

5-{4-[2-(甲基-2-吡啶氨基)-乙氧基]-亚苄基}-4-硫代-2,4-噻唑烷二酮的合成

以2-氯吡啶为原料,经过取代反应、威廉森反应、劳森反应和缩合反应合成了5-{4-[2-(甲基-2-吡啶氨基)-乙氧基]-亚苄基}-4-硫代-2,4-噻唑烷二酮,4步反应的收率分别为65.49%、63.68%、68.83%和85.48%.中间体和目标化合物经MS、IR和1H-NMR确证是预期的化合物.     

由饱和5(4H)-噁唑酮合成N-酰基-2-硫酮氢化噻唑的方法

N-酰基-2-硫酮氢化噻唑在合成酯、酰胺、醛、二醇等,特别是在不对称的Aldol反应中得到了应用。用三聚氯氰在三乙胺存在下,使羧酸与2-硫酮氢化噻唑反应,直接分子间脱水缩合,成功地得到了N-酰基-2-硫酮氢化噻唑。本文报道了另一种新的合成方法,在三乙胺存在下,由饱和5(4H)-噁唑酮与2-硫酮氢化噻唑反应合成了N-酰基-2-硫酮氢化噻唑(I),并由此进一步得到了N-酰基二肽和三肽(Ⅱ_(a～d))。     

磺胺选择性卤化的研究

为开发新型磺胺类药物中间体,以磺胺和温和的卤化试剂N-卤代丁二酰亚胺为原料合成了3-卤代磺胺化合物和3,5-二卤代化合物。对磺胺芳环上3-位的选择性卤化进行了条件摸索和优化。实验表明,室温下,以乙腈为溶剂,向磺胺(0.1 mmol)中每间隔10 min分3次加入N-卤代丁二酰亚胺(总量为0.1 mmol,溶解在1 m L乙腈中),反应0.5~1 h。产物以3-卤代产物为主。经红外光谱、核磁共振氢谱等手段对产物进行了表征,证明了合成方法的可靠性。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that