微波辅助下5-氟尿嘧啶-1-基乙酸的绿色合成

在微波辐射下,以水作溶剂,以氯乙酸、5-氟尿嘧啶为原料合成了具有重要生理活性的标题化合物5-氟尿嘧啶1-基乙酸．产率86．8％．该方法反应时间短,分离方便,产品纯度高．     

卟啉-5-氟尿嘧啶衍生物的合成与表征

5-氟尿嘧啶(5-Fu)是一种作用于DNA合成期的抗恶性肿瘤药物,主要用于消化道癌和乳腺癌,是治疗胃癌的首选药.但它的一大缺点是服药有效剂量与中毒量相近,在杀死癌细胞的同时正常细胞损伤也较严重.     

2-(5-氟尿嘧啶-1-基乙酰基)氨基乙酸的合成及表征

50多年来,5-氟尿嘧啶(5-FU)一直作为首选抗代谢药物用于临床治疗胃癌、结直肠癌、乳腺癌、肝癌等多种癌症[1-2].但由于其亲脂性较低以及生物利用度低,影响抗肿瘤疗效,且其治疗剂量与中毒剂量接近,从而给临床应用带来了一定的问题.     

5-氟尿嘧啶-β-环糊精前药的合成

为达到5-氟尿嘧啶结肠靶向释药的目的,合成了不同取代度的5-氟尿嘧啶-β-环糊精前药,其结构经UV-vis,1H NMR,13CNMR,IR,ESI-MS和元素分析表征.     

5-氟尿嘧啶-聚[N-(2-羟乙基)-L-谷酰胺]的合成及缓释性能研究

以聚谷氨酸苄酯为原料,用乙醇胺进行胺解得水溶性的可生物降解的聚[N-(2-羟乙基)-L-谷酰胺];用光气/甲苯液活化5-氟尿嘧啶,将其以共价键形式键合在高分子上,得5-氟尿嘧啶的高分子前药。用IR、UV、1HNMR及DSC对其结构进行表征,用紫外光谱测定其药物含量,载药高分子的接药率约为38.4%,高分子前药在pH=7.2的磷酸盐介质中42天内的药物累积释放量为57.53%。实验结果表明,5-氟尿嘧啶以共价键的形式键合在聚[N-(2-羟乙基)-L-谷酰胺]之上,在体外有明显的缓释效果。     

5-氟尿嘧啶-1-乙酸合铜(Ⅱ)的合成及其与DNA的作用

The 5-fluorouracil-1-acetic acid (5FuAA) and its Cu(Ⅱ) complex (5FuAACu) were synthesized and the date for the crystal complex was obtained. The interaction of 5-fluorouracil-1-acetic acid (5FuAA) and its Cu(Ⅱ) complex (5FuAACu) with DNA was also investigated by using spectral, viscometric, electrochemical and agarose gel electrophoresis methods. The results of interaction with DNA suggest that both 5FuAA and 5FuAACu can bind to DNA in a static electricity attraction mode. But the attraction of 5FuAACu is greater than that of 5FuAA.     

N,N-二{亚烷基氧羰基苯基-5-[10,15,20-三(4-氯苯基)]卟啉基}-5-氟尿嘧啶的合成与表征

用对氯苯甲醛和对羧基苯甲醛为原料,合成了周边含羧基苯基的不对称卟啉中间体,然后再与5-氟尿嘧啶反应,合成了两种亚烷基链长不同的标题化合物,产率为22.1%和19.8%.产物结构由元素分析、红外光谱、紫外可见光谱、核磁共振谱和质谱表征确认.同时对目标化合物的合成条件进行了研究,结果表明,在以DMF为溶剂、反应温度在125℃、反应时间8h条件下,反应产率较高.     

新型吡啶卟啉-5-氟尿嘧啶化合物的合成

新型吡啶卟啉-5-氟尿嘧啶化合物的合成;吡啶卟啉; 氟尿嘧啶; 合成     

新型氯苯基卟啉-5-氟尿嘧啶的合成

以3,4-二氯苯甲醛、对羟基苯甲醛,吡咯和1,5-二溴戊烷(或1,6-二溴己烷)为原料,经两步反应合成了溴烷氧基氯苯基卟啉(2a或2b);2与5-氟尿嘧啶反应,合成了两种新型的氯代苯基卟啉-5-氟尿嘧啶[1a(产率28.26%)和1b(产率29.34%)],其结构经UV-Vis,~1H NMR,IR和MS表征.     

新型间氯苯基卟啉-5-氟尿嘧啶化合物的合成与表征

用5-[3-(3-溴丙氧基)苯基]-10,15,20-三(3-氯苯基)卟啉或5-[3-(4-溴丁氧基)苯基]-10,15,20-三(3-氯苯基)卟啉与5-氟尿嘧啶反应,合成了1,3-二[5-(3-丙氧基苯基)-10,15,20-三(3-氯苯基)卟啉]-5-氟尿嘧啶(A1)、1-[5-(3-丙氧基苯基)-10,15,20-三(3-氯苯基)卟啉]-5-氟尿嘧啶(B1)、1,3-二[5-(3-丁氧基苯基)-10,15,20-三(3-氯苯基)卟啉]-5-氟尿嘧啶(A2)、1-[5-(3-丁氧基苯基)-10,15,20-三(3-氯苯基)卟啉]-5-氟尿嘧啶(B2),产率分别为20.4%、12.3%、21.4%、11.4%。通过红外光谱、紫外可见光谱、核磁共振谱和基质辅助激光解吸-电离飞行时间质谱测试技术表征了其结构。对目标化合物的合成分离纯化条件进行了研究。结果表明,选择DMF为溶剂,反应温度在120℃,反应时间10h,产率较高;采用硅胶G(粒径40μm)柱层析,按试验产品量,柱子直径为3cm,柱高10cm,用V(氯仿)∶V(丙酮)=15∶1为洗脱剂,分离效果较好。     

N-[1-(取代苯基)乙基]-2-羟基苯甲酰肼的合成、表征及抑菌活性

依据邻羟基二苯醚及芳香肼类化合物的抗菌特性, 以邻羟苯基为分子核心, 酰肼键为桥基, 设计合成了7种未见报道的N-(取代苯基)乙基-2-羟基苯甲酰肼类化合物. 以水杨酸甲酯为原料, 经肼解反应后与取代苯乙酮缩合, 再与硼氢化钠反应制得目标化合物, 化合物结构经IR, ¹H NMR和元素分析等证实. 抗菌活性测试结果表明, 该类化合物对不同菌株的抑菌活性具有明显的选择性和特异性. 当质量浓度为1×10^-4 g/mL时, 化合物3b和3e对大肠杆菌和白色念珠菌的抑菌率高达100%, 有极强的抑菌活性; 所有化合物对金黄色葡萄球菌的抑菌率均大于70%, 有一定的抑菌活性. 构效关系分析结果表明, 苯基中引入Cl或Br等卤原子能显著增强化合物的抑菌活性, 而引入-NO₂及-CH₃基团则会降低其抑菌活性.     

Poly[2-(N,N-Dimethylamino) Ethyl Methacrylate] /Poly(Styrene-Co-Methacrylic Acid) Interpolymer Complexes

Summary: Poly[2-(N,N-dimethylamino)ethyl methacrylate] (PDMAEMA), copolymers of different compositions of styrene with 2-(N,N-dimethylamino)ethyl methacrylate (SDMAEMA) or methacrylic acid (SMA) were synthesized by free radical polymerization and characterized by several techniques. Different ternary mixtures containing proton-acceptors PDMAEMA or SDMAEMA, proton-donor copolymers SMA and a solvent (butan-2-one or THF) were prepared. The present study, that investigated several factors that affected the phase behaviors of the ternary mixtures above, confirmed that, indeed depending on the nature of solvent, densities of interacting species, amounts of efficient specific interactions that occurred between the two copolymers, interpolymer complexes of different structures were elaborated. The complexation phenomena, observed with these different systems were analyzed in solution by viscometry that confirmed these effects in monitoring the formation of interpolymer complexes. The specific interactions that occurred between pairs of polymers of each system above were qualitatively evidenced by FTIR spectroscopy from the appearance of new bands or their new redistribution. The glass transition temperature Tg of the obtained complexes of different structures determined by DSC varied differently with the weight fraction of one of the copolymers. These various Tg-compositions were analyzed using the Kwei and Brostow et al. approach recently developed. Thermal analysis of some of the elaborated complexes, examined by thermogravimetry, confirmed their improved thermal stability.     

2-(3-芳氧甲基-4-苯基-1,2,4-三唑-5-硫基)乙酸的微波合成及生物活性研究

在微波辐射条件下, 芳氧乙酰肼经两步反应制得4-苯基-3-芳氧甲基-1,2,4-三唑-5-硫酮衍生物, 再与氯乙酸反应得到6种尚未见文献报道的2-(3-芳氧甲基-4-苯基-1,2,4-三唑-5-硫基)乙酸衍生物. 目标化合物的结构经IR, ¹H NMR和元素分析进行了确证. 生物活性试验结果表明, 该类化合物对双子叶植物油菜具有良好的生物调节活性.     

Polystyrene bis[N-(2-pyridyl) sulfonamide] palladium(II): Synthesis,characterization as a catalyst for coupling reactions

The [N-(2-pyridyl)] para-styrene sulfonamide (PSS) was prepared as a monomer, from the reaction of para-styrene sulfonyl chloride and 2-amino pyridine in the presence of potassium hydroxide solution 0.5 M as a base, and CH₃Cl. Polystyrene [N-(2-pyridyl) sulfonamide] (PPSS) was synthesized from the polymerization of [N-(2-pyridyl)] para-styrene sulfonamide (PSS). The Polystyrene bis [N-(2-pyridyl) sulfonamide] palladium (II) as a polymer- supporting palladium complex was also prepared from the reaction of PdCl₂ (CH₃CN)₂ with PPSS in the presence of KOH 0.5 M. Polystyrene bis [N-(2-pyridyl) sulfonamide] palladium (II) is produced as a novel heterogeneous catalyst for coupling reactions for C-C bond formation. This method includes higher yield and has an easier work-up procedure. The structures of the monomer, polymer and its Pd complex were confirmed by using FT-IR and ¹H-NMR spectroscopy. Elemental analysis of Pd by inductively coupled plasma (ICP) technique and hot filtration test showed loading of the metal into solution from the catalyst The heterogeneous catalyst was recycled without any loss in its properties.     

Synthesis and Characterization of Calix[4]arene Functionalized Poly(ethylene glycol) Derivatives

Calix[4]arenes with both ligating and methoxy poly(ethylene glycol) groups appended have been synthesized using several approaches, involving the formation of sulfonyl ester groups on the wide rim, Schiff base derivatives on the narrow rim, and thioether groups on both the wide and narrow rims. These new derivatives have been characterized by a combination of infrared and ¹H NMR spectroscopy. Compounds 10 and 11 are insoluble in both water and aqueous poly(ethylene glycol), but the other new compounds are soluble.     

The Synthesis of Some Novel N-[a-(Isoflavone-7-O-)Acetyl ] Amino Acid Derivatives

A series of novel N-[(α)-(isoflavone-7-O-)acetyl] amino acid methyl esters were prepared from the efficient and regioselective alkylation of isoflavones with chloroacetyl amino acid derivatives under mild condition.     

Synthesis and Crystal Structure of 1-H-Pyrrole-2-carboxylic Acid [2-(Naphthalen-1-ylamino)-ethyl]-amide

1 INTRODUCTION Pyrrole based compounds are frequently observed as hosts for neutral molecules[1] and anionic spe- cies[2]. Meantime, it is found that these compounds also have the ability to form higher order self-assem- bled ensembles and aggregates in solid state through hydrogen bonds[3]. In previous work, we have re- ported the crystal structures of two pseudopoly- morphs of o-di-(pyrrole-2-carboxamides)-phenylene 1[4]. A helical assembly is observed when 1 forms specific hydrogen bon…     

2-[2-(6-溴苯并噻唑)偶氮]-5-二甲氨基苯甲酸的合成及与钴显色反应的研究

本文合成了新显色剂2-[2-(6-溴苯并噻唑)偶氮]-5-二甲氨基苯甲酸(6-Br-BTAMB)。研究了钴与(6-Br-BTAMB)的反应。在TritonX-100存在下Co(Ⅱ)与6-Br-BTAMB在pH6.3～8.5缓冲溶液中形成稳定的蓝色配合物。其组成为Co(Ⅱ):(6-Br-BTAMB)=1:2。表观摩尔吸光系数ε为1.27×10~5L·mol~(-1)·cm~(-1)。钴浓度在0～12.0μg/25mL范围内服从比尔定律。该方法灵敏度高,选择性好,并用于测定VB_(12)和含钴分子筛中的微量钴。     

Synthesis and Crystal Structure of 1-（4-Fluorophenyl）-2-hexylthiobenzo[4,5]-furo[3,2-d]-1,2,4-triazolo[1,5-a]pyrimidin-5（1H）-one

The crystal structure of the title compound 1-(4-fluorophenyl) -2-hexylthio-benzo [4,5]furo[3,2-d]-1,2,4-triazolo[1,5-a]pyrimidin-5(1H) -one(C23H21FN4O2S,Mr = 436.5) has been prepared and determined by single-crystal X-ray diffraction. The crystal is of monoclinic,space group P21/n with a = 13.9854(3) ,b = 17.2678(4) ,c = 18.1828(5) ,β = 99.364(2) °,V = 4332.58(18) 3,Z = 4,Dc = 1.338,F(000) =1824,μ = 0.185 mm-1,MoKa radiation(λ = 0.71073) ,R = 0.0538 and wR = 0.1162 for 4728 observed reflections with I > 2σ(I) . X-ray diffraction analysis reveals the fused rings of benzo[4,5]furo[3,2-d]-1,2,4-triazolo[1,5-a] pyrimidin-5(1H) -one system are nearly coplanar. The crystal packing is mainly stabilized by weak intermolecular C-H···O hydrogen bond and π-π interactions.