共查询到20条相似文献,搜索用时 125 毫秒
1.
以2-乙氧基乙胺和3-氯-1-丙醇等为起始原料, 经7步反应, 制备了N,N-二[二(3-甲氧基丙基)膦基乙基]-2-乙氧基乙胺(PNP5)盐酸盐, 其中关键步骤是后两步. PNP5盐酸盐的结构和组成通过IR, 1H NMR, 13C NMR, 31P NMR, MS和元素分析等方法确认. 相似文献
2.
3.
4.
以2-氨基嘧啶、对甲氧基氯苄和N,N-二甲基-2-氯乙胺为原料,经两步N-烃基化反应合成了抗过敏药物盐酸松齐拉敏,总收率75.1%,其结构经1H NMR, 13C NMR和HR-MS(ESI)确证。 相似文献
5.
6.
7.
以(S)-2-氨基丙醇和氯乙酰氯为起始原料,经酰化和环合反应制得(S)-5-甲基吗啉-3-酮(4); 4经还原制得(S)-3-甲基吗啉(5); 5与4-溴-2-甲基苯甲酸酰化缩合合成了(S)-(4-溴2-甲基苯基)(3-甲基吗啉)-甲酮,总收率57%,其结构经1H NMR 和 13C NMR确证。 相似文献
8.
9.
10.
以N-甲基-4-硝基苯胺作为起始原料,依次经氯乙酰化、取代及氢化还原反应制得关键中间体N-(4-氨基苯基)-甲基-2-(4-甲基-1-哌嗪基)乙酰胺(4);以4-氯-3-硝基苯甲酸为原料,依次经酯化、取代、氢化还原及环合反应制得6-甲氧羰基-2-吲哚酮(8); 8与原苯甲酸三乙酯和乙酸酐经“一锅煮”反应制得中间体1-乙酰基-3-甲氧基(苯基)亚甲烯基-2-氧代吲哚环-6-羧酸甲酯(9); 4和9进行取代反应的同时脱除保护,经“一锅煮”反应合成尼达尼布,总收率57.2%,其结构经1H NMR,13C NMR和MS(ESI)确证。 相似文献
11.
N,N-二(2-氯乙基)果糖基磷酰胺酯的合成及其抗肿瘤活性研究 总被引:4,自引:1,他引:3
糖基磷酸酯类化合物,特别是葡萄糖基磷酸酯类化合物的合成及其生物活性的研究已有报道。1988年Hayachi等发现葡萄糖基磷酸酯衍生物具有抗肿瘤、抗病毒等生物活性,可用作医用药物。但果糖基磷酰胺酯及其衍生物的合成与抗肿瘤活性尚未见文献报道。为研究糖基磷酰胺酯的合成方法并筛选出有抗肿瘤活性的化合物,以期发现新型、高效、低毒、有应 相似文献
12.
Reaction of N, N-bis(2-chloroethyl)amine hydrochloride with chloroanhydrides of carboxylic acids of the furan series, in chloroform in the presence of pyridine gives N, N-bis(2-chloroethyl)amides of furan carboxylic acid, furylacrylic acid, 5-nitrofuran carboxylic acid, and 5-nitrofurylacrylic acid.N, N-bis(2-chloroethyl)hydrazides of furan carboxylic acid, furyl carboxylic acid, 5-nitrofuran carboxylic acid, and 5-nitrofurylacrylic acid were obtained in 78–88% yields by reacting N, N-bis(2-chloroethyl)hydrazine hydrochloride with the chloroanhydrides of the appropriate acids in chloroform in the presence of pyridine. The last two hydrazides were prepared in 31 % and 56 % yield, respectively, using anhydrous sodium acetate in place of pyridine. 相似文献
13.
14.
Therearemanykindsofhairdyeswithdifferentformulae.Thekindwedeterminedcontainsthefollowingfiveconstituentsfl,4-phenylenediamine(P-PDA),4-aminophenol(P-APO),3-aminophenol(m-APO),1,3-benzendiol(m-BDO)and2,6-diaminopyridine(DAP).Withreversed-phasehigh-performanceliquidchromatography(RP-HPLC),someotherkindsofhairdyeshadbeendetermined"',butnotourkind.lnthispaperwedescribeaRP-HPLCmethodsuitabIefortheseparationandquantitativedeterminationofallthosefiveconstituentsinhairdyes.Analyseswereperf… 相似文献
15.
Polymeric Schiff base ligands were synthesized using 2-hydroxybenzaldehyde (L2), 4-hydroxy-3-methoxybenzaldehyde (L4), and 5-aminoisophthalic acid. The nanostructured complexes were then synthesized using Ni2+, Cu2+, and Mn3+. The ligands and complexes thus synthesized were characterized using Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis (TGA), and field-emission scanning electron microscopy. The thermal stability of the complexes was confirmed using TGA. The synthesized complexes were used as catalysts in the reduction of 4-nitrophenol (4-NP) to 4-aminophenol in an aqueous phase in the presence of sodium borohydride. In this work, the catalytic reactivity of nanostructured complexes was compared using the rate constant (k) of the reaction. The reaction time for the reduction of 4-NP was 5–14 min for different complexes. The catalytic system based on Ni2+/2-hydroxybenzaldehyde was the most active and displayed reusability in the reduction of 4-NP. 相似文献
16.
The excellent photocatalytic hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with NaBH4 in the aqueous medium is still a big challenge. Herein, we report a facile one-pot evaporation-induced self-assembly (EISA) method to synthesize a series of CuO/TiO2 nanocomposites. The as-synthesized CuO/TiO2 photocatalysts exhibit remarkable catalytic activity under direct sunlight in selective hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) due to the synergistic interaction of guest copper nanoparticles with host titanium dioxide (TiO2) species. Especially, 5 wt% CuO/TiO2 nanocomposite revealed superior reaction rate constant (k) value (0.306 min−1) when compared to 3 wt% CuO/TiO2 (0.192 min−1) and 7 wt% CuO/TiO2 (0.240 min−1). Moreover, several characterization techniques (XRD, TEM, N2 adsorption–desorption isotherm, DRS, and XPS) were executed to deeply investigate the effect of copper content on the bulk and interfacial properties of the catalysts. The characterization results proved that the superior photocatalytic hydrogenation over 5 wt% CuO/TiO2 catalyst can be ascribed to moderate CuO loading as well as even dispersion of CuO species on the surface of active TiO2 host, which can largely improve the light absorption ability within visible light region. Besides, the 5 wt% CuO/TiO2 catalyst exhibits remarkable recyclability and durability, retaining its superior activity (above 95%) up to several repeating cycles, proving its practical applicability for hydrogenation reactions at domestic and industrial levels. 相似文献
17.
Z. P. Penyugalova Z. V Pushkareva V. S. Mokrushin E. F. Golovina 《Chemistry of Heterocyclic Compounds》1970,4(1):126-127
Methods for introducing the cytotoxic bis(-chloroethyl)amino group directly into the phenazine nucleus have been studied. 2-[p-Bis(-chloroethyl)aminobenzylideneimino]-3-hydroxyphenazine and quaternary salts of 2-(p-dimethylaminophenyl)-4, 5-phenazinoimidazole, 2-(p-diethylaminophenyl)-4, 5-phenazinoimidazole, and 2-[N-bis(-chloroethyl)-aminophenyl]-4, 5-phenazinoimidazole have been obtained for biological tests.For part VIII, see [15]. 相似文献
18.
19.
采用高效液相色谱法,对以甲酸铬、4-氯-2-氨基苯酚和2-萘酚为原料合成反应产物单偶氮染料进行分析,以体积比为80∶16∶3∶1的乙腈-水-乙酸-三乙胺为流动相,C18柱为固定相,紫外检测器检测波长为313nm。实验探讨了色谱柱、流动相及pH值等因素对分离效果的影响,确定了最佳色谱条件。该法对甲酸铬、4-氯-2-氨基苯酚、2-萘酚、反应中间体及单偶氮染料的检出限(S/N=3)分别为0.30、0.12、0.17、0.21、0.05g·L-1,这五种组分回收率为95.9%~102.5%,相对标准偏差(RSD)为0.65%~4.16%。该方法简便快速,准确度高,可用于实际生产质量控制分析。 相似文献
20.
Anumberofvanadiumhaloperoxidasehavebeenisolatedfrommarinealgaeandlichen'andarethoughttobeinvolvedintheproductionofalargenumberofhalogenatedorganicsinvivo2.Theactivesiteisshowntoconsistofanoxovanadium(V)withN/Odonors3-5.Somevanatranecompounds(2.8.9-trioxa-5-aza-l-vanabicycl[3.3.3]un-decanes)havebeencharacterizedasfunctionalmodelfromthevanadiumhaloperoxidasesenZymes'.Infact,manyclassesofmetalatranecompoundshavebeensynthesizedandstudiedbecauseoftheirspecificstructureandbiologicalactivity'.Recen… 相似文献