5-溴-2,3-二氢苯并呋喃-7-磺酰氯的合成

以苯酚为原料,经取代、环合、溴代和氯磺化4步反应合成了含有二氢苯并呋喃骨架的杂环类磺酰氯衍生物5-溴-2,3-二氢苯并呋喃-7-磺酰氯。针对氯磺化步骤优化了工艺条件。优化条件为：n(5-溴-2,3-二氢苯并呋喃)∶n(氯磺酸)=1∶6、反应温度25℃、反应时间2.5 h。优化条件下目标产物收率达81%,其结构经¹H NMR、¹³C NMR、质谱和IR确证。     

含1,3,4-■二唑片段的蓝刺头碱衍生物的设计、合成及抗烟草花叶病毒活性

[目的]为了发现具有抗烟草花叶病毒(TMV)活性的新化合物。[方法]通过取代、肼解、环化、取代4步反应将■二唑片段引入到蓝刺头碱结构中,合成11个含1,3,4-■二唑片段的蓝刺头碱衍生物,并对其进行了抗TMV活性测试。[结果]目标化合物结构经¹H NMR、¹³C NMR和HRMS分析确证。抗TMV活性测试结果显示在质量浓度为500 mg/L时,8个蓝刺头碱■二唑衍生物的抗TMV活性高于病毒唑,其中化合物5d和5j的活性最高。[结论]化合物5d和5j可作为抗TMV先导化合物进行进一步结构优化。     

N-烯丙基取代三氮唑类衍生物的无溶剂合成

在无溶剂条件下,由三乙胺介导1,2,4-三氮唑与丙烯酸酯衍生物反应,高产率地合成N-烯丙基取代三氮唑类衍生物。     

2-多氟芳基喹喔啉衍生物的合成及制备工艺研究

以2-羟基喹喔啉衍生物为原料,通过溴化反应制备中间产物2-溴喹喔啉衍生物,与多氟芳烃在碘化亚铜的催化作用下发生偶联反应,合成了2-多氟芳基喹喔啉衍生物,产物结构经过了¹H NMR、1H NMR、⁽¹³⁾C NMR、(13)C NMR、⁽¹⁹⁾F NMR和MS表征。研究了催化剂种类及用量、物料比、反应温度、碱和溶剂对产物收率的影响。结果表明,2-多氟芳基喹喔啉衍生物优化工艺条件为:n(2-溴喹喔啉衍生物)∶n(多氟芳烃)∶n(碘化亚铜)∶n(1,10-菲啰啉):n(磷酸钾)=1.0∶1.5∶0.1∶0.1∶2.0,二甲苯-二甲基甲酰胺V/V=1/1为反应溶剂,在110℃下反应12 h,收率81%。     

一锅法合成5-氨基咪唑类衍生物

目的：合成多取代的5-氨基咪唑类衍生物。方法：以对甲苯磺酰基甲基异腈、取代苯胺与二硫化碳为原料，三分子“一锅法”反应制备5-氨基咪唑类衍生物；以单因子法对反应条件进行筛选。结果：对甲苯磺酰基甲基异腈、取代苯胺与二硫化碳三者以1:1.2:1.5(摩尔比)投料，NaOH为催化剂，乙醇为溶剂，80℃下搅拌反应得到5-氨基咪唑类衍生物，收率为63%～82%，产物经¹H NMR和¹³C NMR表征。结论：该“一锅法”合成方法具有原料廉价易得、反应操作简便等优点。     

5-取代-1H-1,2,4-三氮唑-3-羧酸的合成及结构表征

以5 氯基 1H 1,2,4 三氮唑 3 羧酸乙酯为原料,经Sandmeyer反应合成了5 取代 1H 1,2,4 三氮唑 3 羧酸乙酯,其中取代基为氯、溴、碘、氰基等。并通过UV,IR,1HNMR和元素分析对所有产物的结构进行了表征。     

乙环唑的合成

将2,4-二氯苯乙酮与溴发生取代反应生成（ω-溴-2,4-二氯苯乙酮,然后在催化剂对甲基苯磺酸存在下,（ω-溴-2,4-二氯苯乙酮与1,2-丁二醇发生脱水反应得到2-（2,4-二氯苯基）-2-溴甲基-4-乙基-1,3-二氧戊环,最后缩酮化合物与三氮唑钠缩合得到乙环唑。反应总收率达到70．4％（以2,4-二氯苯乙酮计）,产品含量96％。产物结构经IR、^1H NMR和MS表征。     

7-苄氨基-9,10-二氢-1,2,4-三氮唑并[4,3-a]喹啉衍生物的合成及环合反应的探讨

以6-氨基-3,4-二氢-2(1H)-喹啉酮为起始原料,经缩合、还原、硫代、环合等反应合成了5个7-苄氨基-9,10-二氢-1,2,4-三氮唑并[4,3-a]喹啉衍生物。产物的结构经核磁共振谱和质谱确证。     

1,2,4-三氮唑和哌嗪的酰胺类化合物的合成及生物活性

以氨基硫脲、芳甲酰卤为原料,经亲核取代、环化、亲核取代3步反应制得5-芳基-1,2,4-三氮唑-2-巯基乙酸后,再与单芳酰基哌嗪缩合合成18个未见文献报道的含1,2,4-三氮唑环的双取代哌嗪衍生物。目标化合物的结构通过1HNMR、IR、MS和HRMS确认。初步生物活性测试表明:目标化合物具有一定的抗肿瘤活性。     

6-苯基-[1,2,4]三唑[4,3,a]吡啶-3-胺的合成及工艺优化研究

以5-溴-2-氟吡啶为起始原料,经取代、成环、偶联反应,合成医药中间体6-苯基-[1,2,4]三唑[4,3,a]吡啶-3-胺,其结构经氢谱、碳谱和高分辨质谱进行结构表征证实。考察了反应时间、反应温度、反应物配比、溶剂配比、催化剂用量等因素对目标产物收率的影响,结果表明：化合物6-溴-[1,2,4]三唑[4,3,a]吡啶-3-胺合成的最佳工艺条件为：温度40 ℃,时间15 min;化合物6-苯基-[1,2,4]三唑[4,3,a]吡啶-3-胺合成的最佳工艺条件为：溶剂V（水）：V（二氧六环）=1.0：2.0,反应物物质的量比n（6-溴-[1,2,4]三唑[4,3-a]吡啶-3-胺）：n（苯硼酸）=1.0：1.2,催化剂用量n（6-溴-[1,2,4]三唑[4,3-a]吡啶-3-胺）： n（（Pd(pph3)2Cl2）=1.0：0.1,温度80 ℃。三步反应最终总收率为60%。     

Synthesis,insecticidal activities and DFT study of pyrimidin-4-amine derivatives containing the 1,2,4-oxadiazole motif

Twenty six novel pyrimidin-4-amine derivatives containing the 1,2,4-oxadiazole motif were synthesized. Their chemical structures were confirmed by ¹H nuclear magnetic resonance (NMR), ¹³C NMR, and high-resolution mass spectrography. The insecticidal activity results indicated that some of them possessed excellent insecticidal activity (100%) against Mythimna separate, especially for compounds 6d, 6f, 6o, 6w, 6y and 6z. These compounds exhibited no activity against the insects Aphis medicagini and Tetranychus cinnabarinus. The structure- insecticidal activity relationships are discussed. Density functional theory analysis can potentially be used to design more active compounds. These results provide useful insecticide design information for further optimization.     

双季戊四醇在3种混合溶剂中的固-液相平衡

采用动态平衡法,在293.15～332.80 K、常压下,测定了双季戊四醇(DPE)在水+(甲醇、乙醇、异丙醇)三种混合溶剂中的溶解度数据。结果表明：DPE在不同质量分数的水+(甲醇、乙醇、异丙醇)混合溶剂中的溶解度随体系温度升高而增大;同一温度下,其在所选取溶剂体系中的溶解度随着甲醇、乙醇或异丙醇质量分数的增大而先增大后减小。λh方程、两参数方程与Apelblat方程均能够对所测定的溶解度数据进行较好的关联;通过修正的van’t Hoff方程计算得到DPE在所选取溶剂体系中Δ_sol H ⁰、Δ_sol S ⁰和Δ_sol G ⁰均大于零,表明DPE在所选取溶剂体系中的溶解过程为吸热、熵增的非自发过程。     

Newly developed urethane modified polyetheramide-based anticorrosive coatings from a sustainable resource

Polyetheramide resin was prepared from N,N-bis (2-hydroxy ethyl) soybean oil fattyamide (HESA) and bisphenol-A. It was further treated with toluylene-2,4-diisocyanate (TDI) in different weight percent to obtain urethane modified polyetheramide resins (UPEtA). The structural elucidation of UPEtA was carried out by FT-IR, ¹H NMR and ¹³C NMR spectroscopic techniques. Physico-chemical and physico-mechanical analyses were performed by standard methods. The solubility of UPEtA was determined in various organic solvents at room temperature. TGA and DSC techniques were used to analyze the thermal and curing behavior of the UPEtA resin. The coatings of urethane modified polyetheramide were prepared on mild steel strips. The anticorrosive behavior of UPEtA resin-based coatings in acid, alkali, water and xylene were investigated. The studies reveal that the newly developed UPEtA resin can be used as an anticorrosive coatings material.     

Cu-3-trz-PMo12的合成、结构及催化氧化碘离子性能

采用水热法合成了一例新的多酸基有机-无机杂化物,通过X射线单晶衍射、傅里叶变换红外光谱（IR）、热分析测试（TG）、X射线衍射分析（XRD）、扫描电子显微镜（SEM）、元素分析对化合物进行了表征。X射线单晶衍射分析结果表明,化合物的结构式为（PMo₁₂O₄₀） ［Cu₆（C₂H₄N₄）₆］（PMo₁₂O₄₀）?H₂O（简称为Cu-3-trz-PMo₁₂）,属于三方晶系,R-3空间群,晶胞参数a=1.756 66（3） nm、b=1.756 66（3） nm、c=2.303 24（6） nm、α=β=90°、γ=120°、V=6.155 2（3） nm³、Z=3、R₁=0.023 8、wR₂=0.059 2。化合物是由6个3-氨基-1,2,4-三氮唑、6个Cu⁺、两个经典的Keggin型［PMo₁₂O₄₀］^3-及一个间隙水分子组成的二聚体,两个这样的二聚体通过氢键交替相连形成次级单元,每个次级单元之间又通过氢键作用进而形成一个三维超分子结构。催化研究表明,该非均相催化剂在催化过氧化氢氧化碘离子中表现出较为优异的催化活性且具有较稳定的可重复性。     

Enhancement of solubility via esterification: Synthesis and characterization of octakis (ester)-substituted phthalocyanines

Metal-free and metallophthalocyanines (M = Zn, Ni and ClFe) carrying eight hydroxyethylsulfanyl groups at peripheral positions were prepared from 4,5-bis(hydroxyethylsulfanyl)phthalonitrile. The reactivity of the hydroxyethyl groups was demonstrated by esterification of phthalocyanine derivatives with pyridine-4-carboxylic acid and also ferrocenecarboxylic acid in the presence of dicyclohexylcarbodiimide combined with N,N-dimethylaminopyridine or p-toluenesulfonic acid and acetic anhydride. Unlike the parent phthalocyanines, the symmetrically functionalized phthalocyanines with eight ester units were soluble in common organic solvents such as CHCl₃, THF, pyridine and DMF, sparingly soluble in ethanol and acetone and insoluble in water and hexane. The newly synthesized compounds were characterized by elemental analysis, IR, UV–vis, FAB-MS and ¹H NMR spectroscopy.     

Ordered mesoporous aluminosilicates with very low Si/Al ratio and stable tetrahedral aluminum sites for catalysis

New and ordered 2D-hexagonal (p6mm) mesoporous aluminosilicates (CMI-11) have been synthesized in strongly alkaline media using aluminosilicate ester ((Bu^sO)₂-Al-O-Si-(OEt)₃) as single-source molecular precursor and CTMABr as surfactant and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N₂ adsorption–desorption and ²⁷Al and ²⁹Si MAS NMR spectroscopy. These mesoproous aluminosilicates exhibit a very low Si/Al ratio of 1.9 and highly thermal stable tetrahedral aluminum sites in the mesoporous walls. ²⁷Al and ²⁹Si MAS NMR spectroscopy indicates that the pore walls of CMI-11 are fully condensed with molecular homogeneity of Si–O–Al linkage. These materials are highly important in catalysis, in particular for the petroleum processing and the bulky molecules treatment.     

Polymeric ionic liquid—assisted polymerization for soluble polyaniline nanofibers

To enhance the solubility of polyanilines(PANI),polymeric ionic liquid(PIL)was introduced into the polymerization synthesis of PANI with various proportions.The structure and properties of the modified PANIs were characterized by 1H NMR,Fourier transform infrared spectroscopy,thermogravimetric analysis,ultraviolet-visible spectrum,etc.It was found that the obtained PANIs doped with PILs were soluble in various organic solvents such as N,N-dimethyl formamide and acetonitrile.Compared with the pure PANI,the PANIs doped by PILs showed remarkable solubility and their chemical structure and conductivity kept integrated.     

Characterization of cancrinite synthesized in 1,3-butanediol by Rietveld analysis of powder neutron diffraction data and solid-state Na NMR spectroscopy

The framework structure and extraframework atoms of calcined and dehydrated cancrinite synthesized in 1,3-butanediol are characterized by powder neutron diffraction and ²³Na nuclear magnetic resonance (NMR) spectroscopy. The cancrinite structure is refined in the hexagonal space group P6₃ (No. 173) with lattice parameters a=12.659 Å and c=5.153 Å. Carbonate anions are found occluded in the pores of the cancrinite structure. Although there are two different crystallographic cation sites found by the Rietveld refinement, there are three peaks in the ²³Na magic-angle spinning (MAS) NMR spectrum. These peaks correspond to sodium cations found in site I inside the cancrinite cages, cations in site II inside the cancrinite pore without neighboring carbonates, and cations in site II with neighboring carbonates. Quadrupole coupling constants (QCC) obtained by a simple point-charge model agree well with the simulation of the ²³Na MAS NMR spectra.     

5,7-二甲基-1,2,4-三唑并[1,5-a]嘧啶-2-芳磺酸酯新型化合物的合成及生物活性

三唑类化合物具有广泛的生物活性。以2-羟基-5,7-二甲基-1,2,4-三唑并[1,5-a]嘧啶为原料,在缚酸剂存在下,于室温分别和苯磺酰氯、对甲苯磺酰氯进行酯化反应,合成了两个新型的5,7-二甲基-1,2,4-三唑并[1,5-a]嘧啶-2-芳磺酸酯化合物a和b。产物经质谱、红外光谱、核磁共振谱确证。初步生物活性表明,该化合物具有一定的杀菌活性和除草活性,其中a有较高除草活性,而b对禾本科植物有较好的促进生长活性。     

Influence of the SiO2/Al2O3 ratio on the synthesis and physicochemical characteristics of levyne-type zeolite

Levyne-type zeolites were synthesized from gels of initial compositions 4.5Na₂O-6MeQI-xAl₂O₃ 30SiO₂-500H₂O, with MeQ = methylquinuclidinium and 0.6 ≤ x ≥ 3 at 150 ≤ t ≥ 190 °C. The ²⁹Si NMR spectra show the presence of two crystallographically different sites in the structure. The ²⁷Al NMR spectra also suggest the presence of two different tetrahedral Al atoms incorporated in the structure. A rather high amount of defect groups SiOM and Si(OM)₂ with M = MeQ, Na and/or H are present in the precursor samples. The Si(OM)₂ groups are eliminated during calcination, and a certain amount of SiOM still persists after calcination. The combined ¹³C NMR and thermal analysis data allowed one to interpret the nature of the two different types of MeQ⁺ ions occluded in the levyne channels.