1-芳基亚甲基-2-(6-(3,5-二甲基-1H-吡唑-1-基)-1,2,4,5-四嗪-3-基)肼的合成及抗菌活性

以水合肼和硝酸胍为原料,经过环合、氧化和肼化,得到3-(3,5-二甲基-1H-吡唑-1-基)-6-肼基-1,2,4,5-四嗪(4),以此为原料和不同芳香醛发生腙化反应,得到系列1-芳基亚甲基-2-(6-(3,5-二甲基-1H-吡唑-1-基)-1,2,4,5-四嗪-3-基)肼(5),产物经元素分析、1H NMR、IR和MS表征。所合成的系列化合物抗菌活性测试表明,它们对大肠杆菌、金黄色葡萄球菌、枯草杆菌等3种细菌表现出一定程度的抑制活性。     

1-(3,5-二甲基苯基)-1-[(1S,4S)-1,7,7-三甲基双环[2.2.1]庚烷-2-基]肼的合成工艺改进

以3,5-二甲基苯胺和2-莰酮为起始原料,在微波促进下,经缩合反应制得N-(3,5-二甲基苯基)-1-(1S,4S)-1,7,7-三甲基二环[2.2.1]庚烷-2-亚胺(1);1经硼氢化钠还原后再与羟胺-O-磺酸经胺化反应合成了1-(3,5-二甲基苯基)-1-[(1S,4S)-1,7,7-三甲基双环[2.2.1]庚烷-2-基]肼,总收率70.4%,其结构经1H NMR和ESI-MS确证。     

新型[1,2,4]三唑[4,3-b]均四嗪类化合物的合成及其抗癌活性

以6-(3,5-二甲基吡唑-1-基)-3-肼基均四嗪和芳醛为原料,经Schiff碱缩合和环合反应合成了6个新型的6-芳基-3-(3,5-二甲基吡唑-1-基)[1,2,4]三唑[4,3-b]均四嗪类化合物(4a～4f),其结构经1HNMR,MS,IR和元素分析表征。以顺铂为对照,采用MTT法测试了体外4a～4f对人白血病细胞株,人肺癌,人乳腺癌和人子宫颈癌细胞株的抗癌活性。结果表明,4a～4f对四种癌细胞均具有较强的抑制活性。     

1,4-双(6-苯基-1,2,4,5-四嗪-3-基)苯的合成

以对苯二甲醛为原料,经过单肼化、腙化、氯化和环合氧化四步反应首次合成1,4-双(6-苯基-1,2,4,5-四嗪-3-基)苯,其结构经1H NMR,IR,MS和元素分析表征。     

以2-(1-吡唑基甲基)吡啶类化合物为配体的羰基钼、钨衍生物的合成及结构

合成了2-[1-(3-叔丁基)吡唑基甲基]吡啶(CH2(Py)(3-ButPz)),并研究了羰基钼(钨)与该配体及其类似物2-(1-吡唑基甲基)吡啶(CH2(Py)(Pz))和2-[1-(3,5-二甲基)吡唑基甲基]吡啶(CH2(Py)(3,5-Me2Pz))的反应,合成了6个含双齿螯合的2-(1-吡唑基甲基)吡啶类配体的四羰基金属衍生物CH2(Py)(3-ButPz)M(CO)4,CH2(Py)(Pz)M(CO)4和CH2(Py)(3,5-Me2Pz)M(CO)4(M=Mo或W)。当用SnCl4处理CH2(Py)(3,5-Me2Pz)M(CO)4时,Sn-Cl键对金属中心发生氧化加成得到2个杂双核金属有机化合物CH2(Py)(3,5-Me2Pz)M(CO)3(Cl)SnCl3。所有新化合物均通过了红外和核磁的表征,CH2(Py)(3-ButPz)W(CO)4和CH2(Py)(3,5-Me2Pz)W(CO)3(Cl)SnCl3的结构还得到了X-射线单晶衍射的确证。用循环伏安法测定了四羰基金属衍生物的电化学性质。     

3-取代苄氧基-6-(取代-1H-吡唑-1-基)哒嗪的合成与生物活性

3-氯-6-肼基哒嗪分别与乙酰丙酮和3-二甲胺基丙烯醛反应, 合成了中间体3-氯-6-(3,5-二甲基-1H-吡唑-1-基)哒嗪(2)和3-氯-6-(1H-吡唑-1-基)哒嗪(4), 它们与多种取代苄醇反应, 得到了一系列未见报道的3-取代苄氧基-6-(取代-1H-吡唑-1-基)哒嗪, 其结构均经1H NMR, IR和元素分析确证. 初步的生物活性测试结果表明, 所合成的化合物对油菜和稗草均具有一定的抑制作用.     

2,2-二甲基-1-[5-二茂铁基-3-(三氟甲基)-1H-吡唑-1-基]丙-1-酮的合成及其电化学性质

以乙酰基二茂铁为原料,经3步反应合成了一个新型的二茂铁衍生物——2,2-二甲基-1-[5-二茂铁基-3-(三氟甲基)-1H-吡唑-1-基]丙-1-酮(4),其结构经1H NMR,ESI-MS,元素分析和X-射线单晶衍射表征。4属单斜晶系,P2(1)/c空间群,晶胞参数a=7.805 6(4),b=20.906 1(11),c=11.124 6(6),β=93.820(2)°,V=1 811.33(17)3,Z=4,Dc=1.482 g·cm-3,μ=0.872 mm-1,R1=0.034 8,wR2=0.089 2。采用循环伏安法研究了4的电化学性质。结果表明:4有一对可逆的氧化还原峰,Epa=0.640 V,Epc=0.482 V,ΔE=153 m V。     

3-甲基-4-乙氧羰基-5-取代肼基-1H-吡唑的合成

3-甲基-4-乙氧羰基-5-取代肼基-1H-吡唑的合成;甲基乙氧羰基取代肼基-1H-吡唑;合成;波谱分析     

新型2，6-双（3，5-二取代吡唑基-1-羰基）吡啶的合成

报道了四种吡唑衍生物和它们四种新型的杂环酰胺衍生物的合成，它们是3，5-二甲基吡唑(1)，5-甲基-3-苯基吡唑(2)，3，5-二苯基吡唑(3)，5-甲基-3-二茂铁基吡唑(4)，2，6-双(3，5-二甲基吡唑基-1-羰基)吡啶(5)，2，6-双(5-甲基-3-苯基吡唑基-1-羰基)吡啶(6)，2，6-双(3，5-二苯基吡唑基-1-羰基)吡啶(7)和2，6-双(5-甲基-3-二茂铁基吡唑基-1-羰基)吡啶(8)．并对它们进行了元素分析，FT-IR，^1H NMR和^13C NMR等波谱分析．     

1-芳酰基-4-取代吡唑甲酰基氨基硫脲和环化产物的合成及生物活性

利用1-苯基-3-甲基-5-氯-4-吡唑甲酰基异硫氰酸酯(Ⅰ)与芳酰肼(Ⅱ)的加成反应合成了系列新的酰胺基硫脲衍生物(Ⅲ),并将Ⅲ在酸性条件下进行环化反应得到2-取代吡唑甲酰基氨基-5-芳基-1,3,4-噻二唑(Ⅳ).生物活性测定结果表明部分化合物Ⅲ和Ⅳ具有较好的除草活性.     

Synthesis of Some 2-(3-Alkyl/aryl-5-trifluoromethylpyrazol-1-yl)-4-(coumarin-3-yl)thiazoles as Novel Antibacterial Agents

Abstract

Herein, we describe a one-pot synthesis of some novel 2-(3-alkyl/aryl-5-trifluoromethylpyrazol-1-yl)-4-(coumarin-3-yl)thiazoles (6) involving the reaction of 3-alkyl/aryl-5-hydroxy-5-trifluoromethyl-4,5-dihydropyrazole-1-thiocarboxamides (3) with 3-bromoacetylcoumarins (5) in the presence of sodium carbonate in ethanol. Reaction of 3 with 5 in the absence of sodium carbonate, however, resulted in the formation of 2-(3-alkyl/aryl-5-hydroxy-5-trifluoromethyl-4,5-dihydropyrazol-1-yl)-4-(coumarin-3-yl)thiazoles, which were subsequently dehydrated to 6 by refluxing in ethanol in the presence of sodium carbonate. The structure of the synthesized compounds (6) was confirmed by infrared (IR), mass, ¹H NMR, and ¹³C NMR spectra and elemental analysis data. Newly synthesized compounds (6) showed moderate to good activity against Gram-positive bacteria.     

Electronic Structure and Photophysical Properties of 2-(N,N-diethylanilin-4-yl)-4,6-bis(3,5-dimethylpyrazol-1-yl)-1,3,5-triazine

Electronic structure and photophysical properties of 2-(N,N-diethylanilin-4-yl)-4,6-bis(3,5-dimethylpyrazol-1-yl)-1,3,5-triazine are studied theoretically with quantum chemical methods as well as 2D site and 3D cube representations. The theoretical results reveal that the first excited state is an intramolecular charge transfer excited state. The change in dipole moment for the first excited state of the excitation is fitted, and the calculated result the change in dipole moment ￠1=6.40 D is consistent with the experimental result ￠1=6.90 D. The polarizability is also fitted. The large changes in dipole moment and the polarizability of the excitation show that S1 is of large nonlinear optical (NLO) effect. The NLO will promote efficient two-photon-absorption cross sections. The excited state properties of dpbt with different external electronic fields are also discussed theoretically.     

气相色谱法测定1-(5-溴-1H-吲唑-1-基)乙酮

建立了测定1-(5-溴-1H-吲唑-1-基)乙酮纯度的气相色谱法。采用DB–5型色谱柱,程序升温,火焰光度检测器,外标法定量,1-(5-溴-1H-吲唑-1-基)乙酮在100~1 000 mg/L范围内内线性关系良好,检出限为0.01mg/L。测定结果的相对标准偏差为1.67%~1.89%(n=5),样品加标回收率为98.1%~107.9%。用该方法测定了自制的1-(5-溴-1H-吲唑-1-基)乙酮样品的纯度。该测定方法准确度高、专属性较强且灵敏度较高,适用于1-(5-溴-1H-吲唑-1-基)乙酮的质量控制。     

1-{8-甲氧基-2,3-二氢苯并[b][1,4]二噁烷-5-基}乙酮的合成

以邻香兰素为起始原料、经氧化裂解、付克反应及环合反应制得PDE-4抑制剂的中间体1-{8-甲氧基-2,3-二氢苯并[b][1,4]二噁烷-5-基}乙酮,总收率58.9%。     

Molecular Rectangle Formed by Head-to-tail Self-Assembly of 1-(Dipyrrin-2-yl)-1-(dipyrrin-3-yl)methane

Summary. 1-(Dipyrrin-2-yl)-1-(dipyrrin-3-yl)methane, the N-confused analog of biladiene-ac, is prepared by condensation of 2,3-dipyrromethane with two molecules of 2-formylpyrrole in dichloromethane in the presence of hydrogen bromide. Self-assembly of the ligand with Zn(II) in dichloromethane and methanol offers a dinuclear dimeric complex with a ligand:metal ratio of 2:2. X-Ray crystal structure analysis reveals two ligands bound through a head-to-tail pattern to two zinc centers to form a severely distorted helical conformation, which has the shape of a rectangle.     

Synthesis of 3-(3-Alkyl-5-thioxo-1H-4,5-dihydro-1,2,4-triazol-4-yl)aminocarbonylchromones

A series of 3-(3-alkyl-5-thioxo-1H-4,5-dihydro-1,2,4-triazol-4-yl)aminocarbonylchromones has been prepared by oxidation of 3-formylchromone with Jones' reagent followed by reaction with 3-alkyl-4-amino-4,5-dihydro-1,2,4-triazole-5(1H)-thione in the presence of POCl³. The structures of the compounds were confirmed by IR, LC-MS, and ¹H NMR spectra and elemental analyses.     

d-4-萜品醇丁酸酯的合成及其经皮促透活性评价

目的：合成新型化合物d-4-萜品醇丁酸脂（d-4-T-C4）,探究其对氟比洛芬（SR-FP）的促透作用并研究其促透机制。方法：以d-4-萜品醇（d-4-TER）、丁酸为原料,采用酰氯酯化法合成d-4-T-C4,并通过MS和1H-NMR进行结构表征。同时进行体外渗透实验,考察d-4-T-C4对SR-FP的体外促透活性,并利用红外光谱法和分子对接技术研究其促透机制。结果：加入d-4-T-C4时SR-FP的24 h累计透过量（Q24h）为383.5±48.75 ?g·cm-2,分别为对照组和d-4-TER组的3.12、1.34倍,均有显著差异（P<0.05）。同时通过对药物进行手性拆分可以发现d-4-T-C4对S-FP和R-FP的透过没有显著性差异（P>0.05）。通过探究促透机制发现d-4-T-C4插入角质层脂质结构域,破坏药物与神经酰胺之间的氢键相互作用,增加脂质迁移率和药物的自由能,从而促进药物的渗透。结论：d-4-T-C4对SR-FP具有显著的促透效果,有望作为新型促透剂在经皮给药系统中广泛应用。     

Synthesis of 1-aryl-3-（3,4-dihydro-2H-chromen-5-yl） ureas as TNF-α inhibitors

A new series of compounds,1-aryl-3-(3,4-dihydro-2H-chromen-5-yl) ureas,have been synthesized and their structures were confirmed by FAB-MS and ~1H NMR.The preliminary pharmacological screening showed that these compounds inhibited TNF-αproduction in lipopolysaccharide (LPS)-stimulated THP-1 cells.     

Carbon-13 NMR Studies of 3-Aryl-4-(5-aryl-Δ 2-1,2,4-oxadiazolin-3-yl)sydnones and 3-Aryl-4-(5-aryl-1,2,4-oxadiazol-3-yl)sydnones

The ¹³C NMR spectra of twelve 3-aryl-4-(5-aryl-Δ²-l,2,4-oxadiazolin-3-yl)sydnones and twelve 3-aryl-4-(5-aryl-l,2,4-oxadiazol-3-yl)sydnones have been measured and assigned by means of proton-noise decoupling and DEPT-experiments. The coupling constants were determined by means of gated decoupling, and NOE effects were observed by comparison of proton-decoupled and inverse-gated decoupled spectra. Differences shown by the oxadiazoline and the oxadiazole rings and the substitution effects are discussed.