含嘧啶环的新型异噁唑甲酰基脲的合成及生物活性研究

以5-甲基-3-异噁唑甲酰胺、草酰氯和4,6-二取代嘧啶为原料,经两步反应合成了5种N-(4,6-二取代嘧啶)-5-甲基-3-异噁唑甲酰基脲新化合物,其结构经1H NMR、IR和元素分析确证。初步测试了目标化合物对马唐和苘麻等田地杂草的杀除活性,结果表明,部分化合物对马唐有较好的抑制活性。     

2-（2-（4，6-二甲氧基嘧啶-2-氧）苯基）-4，4-二甲基异嗯唑-3-酮的合成

以邻甲酚、醋酸酐、4,4-二甲基异嗯唑-3-酮、4,6-二甲氧基-2-甲磺酰基嘧啶为原料,经乙酰化、溴化、Ⅳ_烷基化、醚化4步反应合成了标题化合物2-（2-（4,6-二甲氧基嘧啶-2-氧）苯基）-4,4-二甲基异嚷唑-3-酮,收率42．4％,化合物结构采用^1H NMR、IR、元素分析表征。     

光稳定剂中间体2-氯-4,6-二(N-丁基-1-环己氧基-2,2,6,6-四甲基-4-哌啶胺基)-1,3,5-三嗪的合成研究

采用单因素法,以2-氯-4,6-二(N-丁基-2,2,6,6-四甲基-4-哌啶胺基)-1,3,5-三嗪、环己烷、叔丁基过氧化氢为原料,三氧化钼为催化剂合成2-氯-4,6-二(N-丁基-1-环己氧基-2,2,6,6-四甲基-4-哌啶胺基)-1,3,5-三嗪。结果表明,最佳工艺条件为反应温度95℃,反应时间14 h,原料物质的量比n(2-氯-4,6-二(N-丁基-2,2,6,6-四甲基-4-哌啶胺基)-1,3,5-三嗪)∶n(环己烷)∶n(叔丁基过氧化氢)为0.01∶0.45∶0.2,催化剂三氧化钼用量为0.4 g (相对0.01 mol2-氯-4,6-二(N-丁基-2,2,6,6-四甲基-4-哌啶胺基)-1,3,5-三嗪),产品收率为93.50%。     

两种新型三嗪类紫外线吸收剂的合成与表现

以三聚氯氰为原料,通过三步取代反应,合成了新型三嗪类紫外线吸收剂2-(2-羟基-4-丙二酸二乙酯基氧基苯基)-4,6-二苯基-1,3,5-三嗪(Ⅲ)和2-(2-羟基-4-丙二酸二乙酯基氧基苯基)-4,6-二(4,-甲基)苯基-1,3,5-三嗪(Ⅵ)。对他们及紫外线吸收剂UV1577的溶液进行了光老化试验,通过对比发现它们的抗光老化性能均比UV1577好。Ⅲ、Ⅵ两种化合物的总收率均为68%,含量均在98%以上。同时,用质谱(MS)及红外(IR),确定了物的结构,测定了化合物(Ⅲ、Ⅵ)的熔点。     

新型叠氮-均三嗪类含能化合物的合成与表征

以三聚氯氰为前驱体,通过亲核取代反应,得到硝基芳环均三嗪中间体;再将中间体与NaN3反应,得到4种新型叠氮-均三嗪类含能化合物:4,6-二叠氮基-N-(2-硝基苯基)-1,3,5-三嗪-2-胺基、4,6-二叠氮基-N-(3-硝基苯基)-1,3,5-三嗪-2-胺基、4,6-二叠氮基-N-(4-硝基苯基)-1,3,5-三嗪-2-胺基、2,4-二叠氮基-6-(2-(2,4-二硝基苯基)肼基)-1,3,5-三嗪;采用IR、1 H NMR、13 C NMR、MS等对4种化合物的结构进行了表征;采用TG-DSC研究了4种化合物的热力学性能;通过B3LYP/6-311G**方法预估了化合物的理论密度、标准生成焓、爆速和爆压。结果表明,4种化合物具有较好的热稳定性,叠氮基的引入使其具有较高的正生成焓。综合4种叠氮-均三嗪类含能化合物的性能,化合物2,4-二叠氮基-6-(2-(2,4-二硝基苯基)肼基)-1,3,5-三嗪的性能较佳。     

二氢三嗪类化合物的设计、合成及其促葡萄糖消耗活性研究

以芳香醛和乙酸乙烯酯为原料,经Aldol羟醛缩合反应得到中间体,再与盐酸二甲双胍反应合成一系列新型结构的标题化合物。其结构经1HNMR、13CNMR和HRMS确证。在HepG2细胞模型中对目标化合物进行了促葡萄糖消耗活性测试,结果显示大部分化合物具有一定的促葡萄糖消耗活性。其中,化合物4-氨基-3,6-二氢-2-二甲氨基-6-苯乙烯基-1,3,5-三嗪、4-氨基-3,6-二氢-2-二甲氨基-6-(2,3-二甲氧基)苯乙烯基-1,3,5-三嗪、4-氨基-3,6-二氢-2-二甲氨基-6-(3,4-二甲氧基)苯乙烯基-1,3,5-三嗪、4-氨基-3,6-二氢-2-二甲氨基-6-(2,5-二甲氧基)苯乙烯基-1,3,5-三嗪和4-氨基-3,6-二氢-2-二甲氨基-6-胡椒苯乙烯基-1,3,5-三嗪的促葡萄糖消耗活性较阳性对照药二甲双胍略强或相当,它们具有进一步开发的价值。     

氰基取代苯乙烯基化合物的合成及光物理性能研究

氰基具有强吸电子性,氰基的引入能够降低化合物的最低未占分子轨道(LUMO)能级和能隙(Eg)。以1-(4-(4,6-二氯-1,3,5-三嗪)氨基苯基)-2-(4-N,N'-二(甲基苯基)苯胺基)乙烯(MTPATRC)为母体,对均三嗪(TRC)上的氯进行氰基取代,合成了1-(4-(4-氰基-6-氯-1,3,5-三嗪)氨基苯基)-2-(4-N,N'-二(对甲基苯基)苯胺基)乙烯(MTPA-TRCc1)和1-(4-(4,6-二氰基-1,3,5-三嗪)氨基苯基)-2-(4-N,N'-二(对甲基苯基)苯胺基)乙烯(MTPA-TRCc2),其结构得到~1H NMR、ESI高分辨质谱及红外光谱等表征。研究了反应温度、时间和投料比对反应收率的影响,得到该反应的最适宜反应条件。通过紫外-可见吸收光谱,循环伏安测试分析其光物理及电化学性能,并结合计算化学得到了各化合物的计算能级。研究结果表明,1个氰基的引入可明显降低了化合物的LUMO能级及能隙Eg,但第2个氰基的进一步作用效果却很小;MTPA-TRCc1表现出最强的吸光度以及分子内电荷转移程度。     

来氟米特异构体的合成研究

以5-甲基异噁唑-4-甲酸(1)为起始原料,经酰氯化得5-甲基-4-异噁唑甲酰氯(2),2与三氟甲基苯胺(3)缩合反应,得来氟米特异构体(4),最后经氢氧化钠水解,得水解产物5,纯度98%,收率为74%~85%。所合成的化合物经熔点和质谱分析确证,为来氟米特质量控制提供依据。     

2-苯基-4,6-二[2-羟基-4-(甲基哌啶氧基羰基甲氧基)苯基]-1,3,5-三嗪的合成与表征

以三聚氯氰为起始原料,通过格氏反应、Friedel-Craft反应、醚化反应及酯交换反应合成了两个含受阻胺结构的新型三嗪类双功能光稳定剂——2-苯基-4,6-二[2-羟基-4-(2,2,6,6-四甲基哌啶氧基羰基甲氧基)苯基]-1,3,5-三嗪(Ⅳa)及2-苯基-4,6-二[2-羟基-4-(1,2,2,6,6-五甲基哌啶氧基羰基甲氧基)苯基]-1,3,5-三嗪(Ⅳb),收率分别为37.6%和38.1%;用MS、1HNMR和IR确定了目标产物的结构;测试了其紫外吸收性能。结果显示,目标产物在270~400 nm有较强吸收,Ⅳa和Ⅳb最大摩尔吸收系数分别为6.651 3×104L.mol-1.cm-1(276nm),2.837 4×104L.mol-1.cm-1(339 nm);6.435 9×104L.mol-1.cm-1(276 nm),2.648 3×104L.mol-1.cm-1(339 nm)。     

异噁唑类杀虫剂氟噁唑酰胺合成工艺研究

优化合成路线和工艺，合成目的产物氟噁唑酰胺。以3,5-二氯溴苯为原料，经格氏化，与三氟乙酸甲酯反应得到3’,5’-二氯-2,2,2-三氟苯乙酮；在月桂酸钠的催化下，2-甲基-4-乙酰基苯甲酸与3’,5’-二氯-2,2,2-三氟苯乙酮缩合，脱水，再与盐酸羟胺环化得到关键中间体4-[5-(3,5-二氯苯基)-5-三氟甲基-4,5-二氢异噁唑-3-基]-2-甲基苯甲酸；关键中间体经酰氯化后氨解得到4-[5-(3,5-二氯苯基)-5-三氟甲基-4,5-二氢异噁唑-3-基]-2-甲基苯甲酰胺；然后与原甲酸三甲酯，甲氧基胺盐酸盐反应得到目的产物氟噁唑酰胺。产物结构经核磁共振氢谱确证。该工艺简单经济，条件温和，具有工业化应用前景。     

DMTMM-mediated grafting reaction of glucuronic acid on chitosan

Compared with traditional conjugates 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS), 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride (DMTMM) is an emerging biological coupling reagent and has been used in the amidation of hyaluronic acid. In this paper, DMTMM was used to achieve the amidation of chitosan (CS) with glucuronic acid (GA) in an aqueous medium to generate a GA-CS derivative. The grafting efficacy was preliminarily compared with the EDC/NHS-mediated reaction. As a result, the substitution degree of 17.6% for DMTMM-mediated grafting and 13.1% for EDC/NHS chemistry indicated that DMTMM-mediated synthesis of GA-CS appeared to be more efficient. The reaction kinetics experiments showed that GA-CS derivative with a degree of substitution up to about 26.1% was obtained using equal molar ratios of DMTMM and GA exceeding CS at room temperature. These results indicate that employing DMTMM as a coupling agent is a feasible and promising strategy for the amidation modification of chitosan.     

Synthesis, absorption and fluorescence properties of N-triazinyl derivatives of 2-aminoanthracene

N-(4,6-dichloro-1,3,5-triazin-2-yl)-2-aminoanthracene was synthesized by substitution of one chlorine atom of 2,4,6-trichloro-1,3,5-triazine with 2-aminoanthracene. A new series of N-triazinyl-2-aminoanthracenes was prepared by nucleophilic substitution of one or both chlorine atoms on N-(4,6-dichloro-1,3,5-triazin-2-yl)-2-aminoanthracene with electron-donating methoxy or phenylamino groups. The UV/Vis absorption, fluorescence and excitation spectra as well as the fluorescence quantum yields of the prepared compounds were measured in 1,4-dioxane, ethyl acetate, dibutyl ether and acetonitrile; nanosecond kinetics of the fluorescence decay was measured in different solvents. The influence of the character of the substituent on triazinyl ring and of the solvent polarity upon the absorption and fluorescence spectra and fluorescence quantum yields are discussed.     

Electrochemical behavior of a new <Emphasis Type="Italic">s</Emphasis>-triazine-based dendrimer

The electrochemical behavior of a new G-2-s-triazine-based dendrimer, 2,4,6-tris-{4-{4,6-bis-{4-{4,6-bis-[(1S,2S)-1,3-dihydroxy-1-(4-nitrophenyl)-prop-2-ylamino]-s-triazin-2-yl}-piperazin-1-yl}-s-triazin-2-yl}-piperazin-1-yl}-s-triazine, (I), was studied in dimethylsulfoxide solution by cyclic voltammetry, on platinum and graphite electrodes. The electrochemical properties of I were compared with that of one of its precursor, N-{4,6-bis{4-{4,6-bis[(1S,2S)-1,3-dihydroxy-1-(4-nitrophenyl)-prop-2-ylamino]-s-triazin-2-yl}-piperazin-1-yl}-triazin-2-yl}-piperazine), (II), together with that of the starting material, (1S,2S)-2-amino-1-(4-nitrophenyl)-propane-1,3-diol (“p-nitrophenylserinol”), (III).     

4-(9-蒽基)-6-辛氧基-1,3,5-三嗪-2-胺的合成及其在酸性介质中的光谱行为研究

以2,4-二氯-6-辛氧基-1,3,5-三嗪为原料,经Kumada偶联及胺化两步反应合成了三嗪胺衍生物:4-(9-蒽基)-6-辛氧基-1,3,5-三嗪-2-胺(AOOTA),总产率为38%.通过紫外-可见吸收光谱及荧光光谱研究了氯仿溶液中AOOTA在乙酸(HOAc)及三氟乙酸(TFA)作用下的光谱行为.研究发现AOOTA与HOAc在基态及激发态下均不能发生双氢键作用,而AOOTA与TFA相互作用基态下形成双氢键复合物,激发态下由于分子中蒽基及辛氧基与三嗪环间的C—C单键以及C—O单键的自由旋转,从而使得AOOTA与TFA分子间不能形成有效的氢键相互作用.     

2-氨基-4-二甲氨基-6-三氟乙氧基-1，3，5-三嗪的合成研究

以三聚氯氰为初始原料,以丙酮为溶剂,先于-5℃下通入氨气,生成2-氨基-4,6-二氯-1,3,5-三嗪,再在-10℃下与二甲胺水溶液反应生成2-氨基-4-二甲氨基-6-氯-1,3,5-三嗪,用乙醇重结晶,最后同三氟乙醇在金属钠存在下回流反应生成产物,用乙醇和水混合溶剂重结晶得到含量99%以上的2-氨基-4-二甲氨基-6-三氟乙氧基-1,3,5-三嗪。     

4-(9-蒽基)-6-十六烷氧基-2-氨基-1,3,5-三嗪的合成及光谱行为的研究

从三氯均三嗪出发通过三步反应合成了4-(9-蒽基)-6-十六烷氧基-2-氨基-1,3,5-三嗪(AHTA),并通过红外、核磁、质谱、高分辨质谱对目标产物进行了表征.研究表明AHTA分子在基态下分子的蒽环与三嗪环不共平面,激发态下表现为ICT的荧光发射.由于分子间氢键作用的存在,AHTA在自组装膜和LB膜中均形成H-聚集体.     

一种磺胺类碳酸酐酶Ⅸ抑制剂的合成

为发展一种适合18F标记用于CAⅨ检测的特异性PET探针,该文以对氨基苯磺酰胺和三嗪为主要原料,用乙二醇、2-氟乙醇、对甲基苯磺酰氯对三嗪环进行适当修饰,合成了可能具有高亲和力和选择性的CAⅨ抑制剂4-[4-(2-氟乙氧基)-6-(2-羟基乙氧基)-1,3,5-三嗪-2-亚胺基]苯磺酰胺,用于前期生物学评价和探针放射化学合成的参比化合物,同时合成了用作18F标记的前体化合物4-(4,6-双[2-(4-甲基苯磺酰氧基)乙氧基]-1,3,5-三嗪-2-亚胺基)苯磺酰胺,这两个化合物的收率分别为27.6%和13.1%,可满足下一步放射化学标记的需要。上述工作为进一步发展CAⅨ特异性PET探针建立了基础。     

受阻胺类光稳定剂Chimassorb 2020的合成

以三聚氯氰、二正丁胺、2,2,6,6-四甲基-N-丁基-4-哌啶胺和N,N′二(2,2,6,6-四甲基-4-哌啶基)1,6-己二胺为原料合成了Chimassorb2020。首先以三聚氯氰和二正丁胺在丙酮/水中反应得到2,4二(二正丁胺基)6氯1,3,5均三嗪(I),收率92%;再以三聚氯氰和2,2,6,6-四甲基-N-丁基-4-哌啶胺在5℃以下反应3h得到2(2,2,6,6四甲基-N-丁基-4-哌啶胺基)-4,6-二氯-1,3,5-均三嗪(Ⅱ)的二甲苯溶液,不需精制,直接与N,N′二(2,2,6,6四甲基-4-哌啶基)1,6-己二胺在80℃反应2h,得到N,N″1,6己烷基二[N丁基6氯N,N″二(2,2,6,6-四甲基-4-哌啶基)1,3,5-均三嗪2,4-二胺](Ⅲ),收率80%;Ⅲ与N,N′-二(2,2,6,6-四甲基-4-哌啶基)1,6-己二胺在高压釜中于160～180℃反应5h,得到聚合物;此聚合物再与I在高压釜中于160～180℃反应3h,得到Chimassorb2020。在得到的最佳反应条件下,所得产品的平均相对分子质量为2600～3400,在425nm和450nm下的透光率均大于85%。     

The Synthesis and Characterization of Melamine Based and [Fe/CrSalen] or [Fe/CrSalophen] Capped Polimer Schiff Base Complexes

In this study, by using previously reported monomer complexes [(2-(4-carboxybenzimino)-4,6-diamino-1,3,5-triazine)(salen/salophenFeIII)], [(2-(4-carboxybenzimino)-4,6-diamino-1,3,5-triazine)(salen/salophenCrIII)], [(2-(3,4-dihydroxybenzimino)-4,6-diamino-1,3,5-triazine)(salen/salophenFeIII)] and [(2-(3,4-dihydroxybenzimino)-4,6-diamino-1,3,5-triazine)(salen/salophenCrIII)] obtained by Uysal and Uçan (J Inc Phenom Macrocycl Chem, in press), sixteen new polimer Fe(III) and Cr(III) complexes involving tetradentate Schiff bases N,N′-bis (salicylidene)ethylenediamine-(salenH₂) or bis(salicylidene)-o-phenylenediamine-(salophenH₂) with 2-(4-carboxybenzimino)-4,6-diamino-1,3,5-triazine or 2-(3,4-dihydroxybenzimino)-4,6-diamino-1,3,5-triazine (Uysal and Uçan, J Inc Phenom Macrocycl Chem, in press) and terephthaldehyde or glutaraldehyde have been synthesized and characterized by means of elemental analysis, ¹H N.M.R., FT-IR spectrscopy, MS, thermal analyses and magnetic susceptibility measurements. The complexes have also been characterized as low-spin distorted octahedral Fe(III) and Cr(III) bridged by catechol and/or COO^? groups.     

Direct and Indirect Biomimetic Peptide Modification of Alginate: Efficiency,Side Reactions,and Cell Response

In the fast-developing field of tissue engineering there is a constant demand for new materials as scaffolds for cell seeding, which can better mimic a natural extracellular matrix as well as control cell behavior. Among other materials, polysaccharides are widely used for this purpose. One of the main candidates for scaffold fabrication is alginate. However, it lacks sites for cell adhesion. That is why one of the steps toward the development of suitable scaffolds for cells is the introduction of the biofunctionality to the alginate structure. In this work we focused on bone-sialoprotein derived peptide (TYRAY) conjugation to the molecule of alginate. Here the comparison study on four different approaches of peptide conjugation was performed including traditional and novel modification methods, based on 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide/N-hydroxy succinimide (EDC/NHS), 4-(4,6-dimethoxy-1,3,5-triazine-2-yl)-4-methylmorpholinium chloride (DMTMM), thiol-Michael addition and Cu-catalyzed azide–alkyne cycloaddition reactions. It was shown that the combination of the alginate amidation with the use of and subsequent Cu-catalyzed azide–alkyne cycloaddition led to efficient peptide conjugation, which was proven with both NMR and XPS methods. Moreover, the cell culture experiment proved the positive effect of peptide presence on the adhesion of human embryonic stem cells.