一种循环延长1,3,4-噁二唑-苯链的合成方法

1,3,4-噁二唑类化合物因具有独特的生物活性和光电性能而被广泛研究,在医药、有机电子和发光材料等领域具有广泛的应用价值.引入多个1,3,4-噁二唑结构单元,常常可以进一步提高此类化合物的功效性.通过将苯甲醛类化合物上的醛基转化为氰基后,再转化为四唑基,然后由苯四唑类化合物和对甲酰基苯甲酰氯反应生成1,3,4-噁二唑类化合物,此化合物保留了对甲酰基苯甲酰氯带入的醛基,可以进一步地采用相同方法循环反应下去,从而可以得到含有多个1,3,4-噁二唑-苯结构单元的系列链状化合物.     

2-苯氧甲基-5-芳基-1,3,4-噁二唑化合物的合成与结构表征

以苯氧乙酸乙酯与水合肼反应制得苯氧乙酰肼, 该化合物在以碳酸钠作缚酸剂, 分别与苯甲酰氯、3,4,5 三甲氧基苯甲酰氯、4 硝基苯甲酰氯、4 甲氧基苯甲酰氯、呋喃甲酰氯、3,5 二甲基苯甲酰氯, 4 氯苯甲酰氯反应得到相应的N, N/ 二酰基肼, 然后在POCl3 作用下, 脱水环化成2 苯氧甲基5 芳基1,3,4 噁二唑化合物. 通过元素分析, IR, 1H NMR和MS对其结构进行表征, 并对其裂解途径进行了探讨.     

2-对甲苯氧甲基-5-芳基-1,3,4-噁二唑化合物的合成与结构表征

对甲基苯氧乙酸乙酯与水合肼反应制得对甲基苯氧乙酰肼，该化合物在以碳酸钠作缚酸剂，分别与苯甲酰氯、4-氯苯甲酰氯、4-甲基苯甲酰氯、4-甲氧基苯甲酰氯、3，4，5-三甲氧基苯甲酰氯、3，5-二甲基苯甲酰氯和4-硝基苯甲酰氯反应得到相应的N，N’-二酰基肼3a一3g，然后在PC吗作用下，脱水环化成2-对甲苯氧甲基-5-芳基-1，3，4-噁二唑化合物4a-4g．通过元素分析，IR，’HNMS对其结构进行表征，并对其裂解途径进行了探讨。     

1-(5-甲基异(口恶)唑-3-甲酰基)-4-芳酰基氨基硫脲的合成

通过5-甲基异(口恶)唑-3-甲酰肼Ⅰ与取代苯甲酰异硫氰酸酯在乙腈溶剂中发生亲核加成反应,制得了9个新的1-(5-甲基异(口恶)唑-3-甲酰基)-4-芳酰基氨基硫脲Ⅱ.Ⅱ经元素分析,IR,~1H-NMR和MS分析确定其结构.     

2-芳基-5-(5-甲基异噁唑-3基)-1、3,4-噁二唑的合成及生物活性的研究

本文研究 N-(5-甲基异噁唑-3-甲酰基)-N′-芳酰基肼(Ⅱ)在三氯氧磷的催化作用下,脱水制备2-芳基-5-(5-甲基异噁唑-3-基)-1,3,4-噁二唑(Ⅲ)的反应.实验中发现当(Ⅱ)中 N′取代基为对碘和邻碘苯甲酰基以及2-萘甲酰基时,得2,5-二芳基-1,3,4-噁唑(Ⅵ).预期的产物未得到.N′-为其它芳甲酰取代基时,得预期的产物(Ⅱ).初步筛选了化合物Ⅱ、Ⅲ中代表物对小麦芽鞘生长的影响.     

2-芳基-3-N-丙酰基-5-(4-碘苯基)-1,3,4-(口恶)唑啉类化合物的合成

4-碘苯甲酰肼(2)与芳醛反应得到相应的酰腙(3a～3i),而后与丙酸酐脱水环化成了2-芳基-3-N-丙酰基-5-(4-碘苯基)-1,3,4-(口恶)唑啉类化合物(4a～4i),通过元素分析、IR、1H NMR和MS方法对化合物4a～4i的结构进行了表征.     

3-苯胺甲基-5-(1’-H-苯并三唑-1’-甲撑)-1,3,4-噁二唑-2-硫酮的合成

1 -H -苯并三唑 - 1-乙酰肼在CS2 /KOH作用下环化得到 5- ( 1‘ -H -苯并三唑 - 1‘ -甲撑 ) - 1,3,4 -口恶二唑 - 2 -硫酮 ,经Mannich反应合成得到标题化合物 3-苯胺甲基 - 5- ( 1’ -H-苯并三唑 - 1’ -甲撑 ) - 1,3,4 -恶二唑 - 2 -硫酮     

2-取代硫醚-5-(5-苯基-1H-3-吡唑基)-1,3,4-噁二唑类化合物的合成及光学性能研究

以5-苯基-1H-3-吡唑甲酰肼为起始原料,经与二硫化碳环合和巯基烷基化两步反应,合成了5个新型的2-取代硫醚-5-(5-苯基-1H-3-吡唑基)-1,3,4-噁二唑类化合物,其结构经IR,~1 H NMR表征.光学性能研究表明目标产物具有良好的荧光性,其最大发射波长在344~347nm范围内.     

2-芳酰氨基-5-(5-甲基异(口恶)唑-3-基)-1,3,4-噻二唑及3-(5-甲基异(口恶)唑3-基)-4-芳酰基-1,2,4-三唑啉-5-硫酮的合成

用I-(5-甲基异(口恶)唑-3-甲酰基)-4-芳酰基氨基硫脲I在酸或碱催化下合成8种2-芳酰氨基-5-(5-甲基异(口恶)唑-3-基)-1,3,4-噻二唑类衍生物Ⅱ(1—8)和8种3-(5-甲基异(口恶)唑-3-基)-4-芳酰基1.2.4-三唑啉-5-硫酮衍生物Ⅲ(1—8).Ⅱ和Ⅲ均经元素分析,IR,H-NMR和MS分析确定其结构.     

用HMO方法研究氧氮杂环戊二烯类化合物的光谱和电荷分布特征

本文用HMO方法计算了对-(2-苯基1,3,4,一恶二唑基-5)-(5’—苯基恶唑基—2’)苯和对-苯基-1,3,4恶二唑基-5)-(2’基苯恶唑基-5’)苯的不同基团取代的衍生物分子30个。用前线轨道能级差ΔE与最大吸收峰波长λmax相拟合,相关系数为0.941。计算的波长与实验值相吻合,且予示了21个化合物的波长。文中对相同基团在不同位置取代和不同基团在相同位置取代的电荷分布特征进行了细微地讨论。     

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.     

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.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.