共查询到20条相似文献,搜索用时 125 毫秒
1.
4-硝基苯甲酰肼与芳醛反应得到相应的酰腙(2),2与丙酸酐脱水环化合成了标题化合物,其结构经^1H NMR,IR,MS和元素分析表征。 相似文献
2.
3.
以NaBrO3/H2SO4氧化体系合成己二酰-1'',6''一双(4-卤偶氮苯) 总被引:2,自引:0,他引:2
取代酰肼化合物是制备偶氮化合物的原料,是一种非常重要的有机化合物,具有广泛的应用价值。它可以和金属形成稳定络合物,对聚烯烃等高分子材料的“铜害”有良好的防护,因而在电线、电缆、钢丝、轮胎等与铜及其它重金属相接触的高分子工业制品中得到广泛应用,被称为金属减活剂。在照像技术方面,苯酰肼类化合物加入氯化银乳胶层中,可提高其光敏感性,使对比度增大,显像效果更为明显。某些酰肼化合物具有抗菌的功效,能抑制多细胞寄生虫的生成,作杀虫剂和农药等。 相似文献
4.
5.
合成了一种新的Schiff碱对硝基苯乙酮缩水杨酰肼,进行了红外光谱、紫外光谱和元素分析表征,并且测定了该化合物的晶体结构,该晶体属于单斜晶系,P2(1)/c空间群。晶胞参数a=1.6068(3)nm,b=1.1838(2)nm,c=0.729 01(15)nm,β=91.39(3)。 相似文献
6.
7.
8.
对甲苯磺酰胺基乙酰腙类化合物的生物活性及其量子化学计算 总被引:3,自引:0,他引:3
以对甲苯磺酰氯为原料, 通过与氨基乙酸反应得到中间体对甲苯磺酰氨基乙酸, 再经酯化、肼解得到对甲苯磺酰氨基乙酰肼, 然后与相应的醛缩合得一系列对甲苯磺酰胺基乙酰腙类化合物. 其结构经元素分析, IR, 1H NMR和13C NMR确证. 采用量子化学方法, 在DFT-B3LYP/6-31G*水平上计算了标题化合物4a~4g的反应热、电荷分布和前线轨道能级. 初步生物活性试验结果表明该系列部分化合物在不同浓度下对植物的生长调节表现出一定的规律性. 相似文献
9.
取代酰肼化合物是制备偶氮化合物的原料,是一种非常重要的有机化合物,具有广泛的应用价值。它可以和金属形成稳定络合物,对聚烯烃等高分子材料的“铜害”有良好的防护,因而在电线、电缆、钢丝、轮胎等与铜及其它重金属相接触的高分子工业制品中得到广泛应用,被称为金属减活剂[2 相似文献
10.
11.
WANG Qiu-yan YU Jing-jun LU Cui-fen CHEN Zu-xing YANG Gui-chun Key Laboratory for the Synthesis Application of Organic Functional Molecules of Ministry of Education School of Chemistry Chemical Engineering Hubei University Wuhan P. R. China 《高等学校化学研究》2009,(3)
A novel and efficient method was developed for the liquid-phase synthesis of N1,4-disubstituted-benzodiazepine-2,5-diones with 2-chloro-5-nitrobenzoic acid as initiating material via 4 step reactions containing esterification,Ulmn reaction,acylation,alkylation and cyclization. The reaction conditions were mild and the overall yields of the products ranged from 45% to 71%. 相似文献
12.
Various carboxamides are synthesized from the corresponding carboxylic acids and amines with high product-selectivities using 2-methyl-6-nitrobenzoic or 2,4,6-trichlorobenzoic anhydride in the presence of 4-(dimethylamino)pyridine. 相似文献
13.
Efficient assembly of 14-membered macrocycles utilizing the SNAr of fluorine in 3-fluoro-4-nitrobenzoic acid with the OH of 3-hydroxytyrosine on solid support is reported. The flexibility of this synthesis, as well as the excellent purity (>90%) of the final products are the distinctive characteristic of the resultant library. 相似文献
14.
Liquid phasel synthesis of biheterocyclic benzimidazoles by controlled microwave irradiation was investigated. Polymer immobilized o-phenylenediamines was synthesized under microwave irradiation. The resulting PEG bound diamines was N-acylated with 4-fluoro-3-nitrobenzoic acid selectively in primary aromatic amino moiety. Nucleophilic aromatic substitution of amide was performed with various amines then cyclized to form the first benzimidazole scaffold in acidic condition. Successive reduction, cyclization with isothiocyanates yielded 5-(benzimidazol-2-yl)benzimidazoles. The desired products were released from the polymer support to afford the tri-substituted bis-benzimidazoles in good yields and purity. 相似文献
15.
超细4A分子筛的超声波低温快速合成 总被引:5,自引:0,他引:5
在低温条件下用超声波快速合成了4A分子筛.产物分别用XRD,IR,SEM和DSC等进行了表征.结果表明,用超声波法合成4A分子筛的速度是常规法的24倍.合成产物的白度为95%,钙离子交换容量为335mgCaCO3/g4A分子筛,平均粒径为280nm.与采用常规方法合成的产物相比,超声波法合成的产物热稳定性有所下降. 相似文献
16.
用2-硫代-3-正丁基-5-苯基亚甲基4-咪唑啉二酮的-S-烷基化反应合成了2-烷硫基-3-正丁基-5-苯基亚甲基-4H-咪唑啉-4-酮衍生物。探讨了S-烷基化反应的反应条件和所合成化合物的波谱性质。目标产物均为新的化合物,其结构经元素分析,IR,1H NMR和MS确正。 相似文献
17.
18.
A convenient synthetic approach to 2-[1-(dialkylamino)alkyl]-4H-3,1-benzoxazin-4-ones has been developed. Thus, 1,1-dimethylethyl 2-isocyanobenzoates, which can be readily prepared from 2-nitrobenzoic acids by a simple four-step sequence, react with N,N-dialkyliminium iodides without using any catalysts under mild conditions to give the desired products in generally fair-to-good yields. 相似文献
19.
A one-dimensional zinc-containing coordination polymer,[Zn2(NBA)2(4,4'-bipy)]n(NBA = 3-nitrobenzoic acid,4,4'-bipy = 4,4'-bipyrindine),has been solvothermally synthesized and characterized by single-crystal X-ray diffraction,IR and elemental analysis.The crystal structure is of monoclinic,space group C2/c with a = 24.6478(2),b = 14.0964(3),c = 11.4275(2),β =108.7870(10)°,V = 3758.89(11)3,C38H20N6O16Zn2,Mr = 947.34,Z = 4,Dc = 1.674 g/cm3,μ = 1.363 mm-1,F(000) = 1912,R = 0.0720 and wR = 0.2277 for 2841 observed reflections(I > 2σ(I)).In this compound,NBA in syn-syn coordination mode bridges zinc centers into dimeric-zinctetracarboxylate [Zn2(COO)4] secondary building units(SBUs) which are linked through μ-4,4'-bpy affording 1D alternating chains.These adjacent chains are further stacked through intermolecular π···π interactions to form a 3D framework. 相似文献
20.
Ming Wu DING* Jing ZHU Su Fang SHI Xiao Peng LIU Institute of Organic Synthesis Central China Normal University Wuhan Department of Chemistry Central China Normal University Wuhan Center of Analysis Testing Central China 《中国化学快报》2002,13(10)
Many N-heterocycles including 4H-imidazolin-4-ones exhibit biological activities1-3. Some derivatives of 5-(2-furfurylidene)-4H-imidazolin-4-one were found to show good antiinflammatory activity4. They can be synthesized by condensation of furfural with 5- unsubsituted 4H-imidazolin-4-ones or from corresponding oxazolones5,6. However, no synthesis of 2-aryloxy substituted 5-(2-furfurylidene)-4H-imidazolin-4-one was reported. Recently, aza-Wittig reaction has received increased attention … 相似文献