共查询到20条相似文献,搜索用时 46 毫秒
1.
Zhi Bin Huang Seung Hyun Chang 《Journal of inclusion phenomena and macrocyclic chemistry》2006,55(3-4):341-346
The novel unique structures of bis-crown ethers were successfully synthesized from tri (propylene glycol) di-acrylate with amino- and aza-crown ethers through Michael addition. The crown ethers contained the primary and the secondary amine group such as 2-aminomethyl crown ethers, 4-aminobenzo crown ethers and 1-aza crown ethers. The newly synthesized bis-crown ethers were characterized by elemental analyses, IR, 1H NMR, 13C NMR, mass spectrum, respectively. The newly synthesized host compounds of bis-crown ethers showed complex ability with various sizes of alkali metal cations such as Na+, K+, Rb+ and Cs+. The complexation behavior was examined by 1H NMR spectroscopy and UV spectrometry. 相似文献
2.
Synthesis,Spectral Characterization,and Antimicrobial Activity of Novel 2,4,6‐Trisubstituted Quinazoline Derivatives by Buchwald and Suzuki Coupling Reactions 下载免费PDF全文
Kotla Veena Vani Garlapati Ramesh Chunduri Venkata Rao 《Journal of heterocyclic chemistry》2016,53(5):1528-1533
A series of novel 2,4,6‐trisubstituted quinazoline derivatives were synthesized starting from 2‐amino‐5‐bromobenzoic acid. The structures of the newly synthesized compounds were established by IR, 1H NMR, 13C NMR, and mass spectral data. All the compounds were tested for antimicrobial activity. 相似文献
3.
2-Amino-4-(2-hydroxynaphthyl)-4H-chromene-3-carbonitriles were synthesized by Michael addition of various 3-cyanoiminocoumarins and β-naphthol in good yield. The heterocyclization of these materials in an acidic medium leads new heterocyclic compounds, which have not previously been described, in moderate to good yields and good selectivity. The synthesized compounds were characterized by infrared, 1H NMR, 13C NMR, two-dimensional NMR, and elemental analysis. 相似文献
4.
《Journal of Coordination Chemistry》2012,65(6):1046-1057
Diorganotin complexes of monoisopropyl and monomethyl nadiate, succinate, and phthalate were synthesized and characterized by elemental analysis, FT-IR, 1H NMR, 13C NMR, and 119Sn NMR spectroscopic techniques. The spectroscopic investigation demonstrated that carboxylate is bidentate in the diorganotin complexes. On the basis of 1 J(119Sn–13C) and 2 J(119Sn–1H) values, C–Sn–C bond angles were also calculated. The newly synthesized complexes were also screened for their antibacterial activities against Gram-positive and Gram-negative pathogenic strains of bacteria. 相似文献
5.
Synthesis and cytotoxicity study of pyrazoline derivatives of methoxy substituted naphthyl chalcones
K. R. Ethiraj P. Nithya V. Krishnakumar A. Jesil Mathew F. Nawaz Khan 《Research on Chemical Intermediates》2013,39(4):1833-1841
2-Acetyl naphthalene reacts with various methoxy substituted benzaldehyde in the presence of 10 % sodium hydroxide solution giving functionalized chalcones. The synthesized chalcones when further reacted with hydrazine hydrate in the presence of acetic acid afforded N-acetyl pyrazolines. All the synthesized products were confirmed by various spectral data such as FTIR, 1H NMR, 13C NMR, and HRMS studies. All the synthesized compounds were screened for cytotoxicity against various cell lines. 相似文献
6.
Zhenyu Tian Kun Meng Yanhong Shi Naixia Zhang Xuehui Liu Hongwei Jin Yongmin Zhang Lihe Zhang Demin Zhou Sulong Xiao 《Tetrahedron》2017,73(17):2512-2517
A newly synthesized hexavalent oleanolic acid/per-O-methylated α-cyclodextrin conjugate shows significant differences in NMR spectra with previously synthesized analogs. Characterization of the product by 1H NMR, 13C NMR, COSY, HSQC, HMBC, TOCSY, NOE, and ROESY experiments were performed. Detailed investigations revealed that the compound has two conformations in solution and the ratio of them was 1:1. Further variable-temperature NMR study revealed that the two conformations were stable at temperature range of 273–323 K in CDCl3 solution. 相似文献
7.
R. I. Dzhalmakhanbetova S. A. Ivasenko A. T. Kulyyasov B. B. Khasenov N. B. Kurmankulov S. M. Adekenov 《Chemistry of Natural Compounds》2004,40(4):381-386
New phosphorus-containing derivatives of grosshemin were synthesized in 68-70% yield by reacting this guaianolide with dialkylphosphites. Their structures were established by IR, PMR, 13C NMR, and 31P NMR spectroscopies and two-dimensional 1H-1H NMR spectroscopy (COSY). The reaction of grosshemin with dialkylphosphites was found to be highly stereoselective. 相似文献
8.
Some new 1,2,4‐triazolo‐, 1,3,4‐oxadiazolo‐, 1,3,4‐thiadiazol‐, and pyrazolo‐2,4,6‐trimethylphenyl‐1(2H)‐oxo‐phthalazine derivatives were synthesized and identified by IR, 1H NMR, 13C NMR, MS and elemental analysis. The new compounds were synthesized with the objective of studying their antimicrobial activity. 相似文献
9.
《Arabian Journal of Chemistry》2014,7(5):604-608
This paper describes the synthesis of a new series of 1,3,5-trisubstituted-1,2,4-triazoles by 1,3-dipolar cycloaddition reaction of C-phenyl-aminocarbonyl-N-arylnitrilimines with guanidine derivatives. The structures of the newly synthesized compounds were elucidated by spectral methods (IR, 1H NMR, 13C NMR and MS spectroscopy) and elemental analysis. The microbial features of the synthesized compounds were studied using well-established methods from the literature. 相似文献
10.
Lingappa Malleshaa Kikkeri N.Mohana Devaraju Rakshith Sreedharamurthy Satishb 《中国化学》2011,29(1):102-108
A series of 2‐methyl‐5‐nitroaniline derivatives, 5a – 5k and 6a – 6f , were synthesized in order to determine their in vitro antimicrobial activity. The chemical structures of the synthesized compounds were confirmed by elemental analyses, UV‐visible, FT‐IR, 1H NMR and 13C NMR spectral studies. The structure‐activity relationships of the synthesized compounds were also discussed. Among the synthesized compounds, 5f , 5d , 6b and 6e showed good antimicrobial activity compared to standard drugs. 相似文献
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12.
Apoorva Misra Jaya Dwivedi Shruti Shukla Dharma Kishore Swapnil Sharma 《Journal of heterocyclic chemistry》2020,57(4):1545-1558
Novel quinazoline embellished analogues of 1,5-benzodiazepine ( 6, 9, 13, 17, 21 and 24 ) were synthesized using one-pot domino approach. Structure of the compounds synthesized, were established with the help of IR, 1H NMR, 13C NMR and mass spectral data. Further, antibacterial activity, FE-SEM imaging and cell leakage study was also performed. 相似文献
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14.
Kazimieras Anusevičius Ilona Jonuškienė Birutė Sapijanskaitė Kristina Kantminienė Vytautas Mickevičius 《Research on Chemical Intermediates》2016,42(9):6975-6990
N-Substituted 7-amino-4-methyl-2H-chromen-2-ones containing one or two functionalized azole or azine moieties were synthesized. The structures of all synthesized compounds were confirmed by IR, 1H NMR, and 13C NMR spectroscopy. Some of the synthesized compounds exhibited weak antibacterial activity against Rhizobium radiobacter, Escherichia coli, and Xanthomonas campestris. 相似文献
15.
Urusova E. A. Gluzdikov I. A. Selivanov S. I. Starova G. L. Nikolaev S. V. Shavva A. G. 《Russian Journal of Organic Chemistry》2004,40(4):506-512
Modified equilenin analogs were synthesized with a view to examine the relation between the structure and biological properties of steroid estrogens. The 1H and 13C NMR signals of six estra-1,3,5,7,9-pentaenes were completely assigned using homo- and heteronuclear correlation NMR spectroscopy. The structure of equilenin methyl ester was determined by X-ray analysis. Among the synthesized steroids, compounds were found which exhibit hypocholesterinemic activity with no uterotropic and hypertriglyceridemic effects. 相似文献
16.
Ritu Sharma Savitri D. Srivastava Santosh K. Srivastava Pushkal Samadhiya 《Arabian Journal of Chemistry》2011,4(2):179-184
A series of new N1-[3-{(4-subtitutedaryl-3-chloro-2-oxo-azetidine)-carbamyl}-propyl]-1,2,3-benzotriazoles 4(a–s) have been synthesized from 1,2,3-benzotriazole as a starting material by microwave method. The structures of all the synthesized compounds were confirmed by chemical and spectral analyses such as IR, 1H NMR, 13C NMR and FAB-Mass. 相似文献
17.
Shams H. Abdel-Hafez Ahmed B. Abdelwahab Gilbert Kirsch 《Phosphorus, sulfur, and silicon and the related elements》2017,192(10):1114-1118
A new series of vitamin E/selenated pyridine, vitamin E/selenated pyridazine, vitamin E/selenated coumarine and vitamin E/selenated nicotine moieties were synthesized and their cytotoxic activity is investigated using the human breast cancer cell line. The newly synthesized compounds were characterized using spectroscopic tools (IR, 1H NMR, 13C NMR, and mass spectroscopy) as well as microanalysis. Our study reveals that compound vitamin E/selenated nicotine moiety has the highest cytotoxic effect than the other synthesized compounds. 相似文献
18.
Cyclic acrylates, 2,2- dimethyl-5-methylene-1 , 3-dioxolan-4 -one and 2- phenyl-5-methylene-1,3-dioxolan-4-one, were synthesized successfully. The monomers were characterized by ~1H NMR, ~(13)C NMR, IR and elemental analysis or HRMS. Polymerization of the monomers were carried out at 120℃with di-t-butylperoxide as initiator. The polymers were studied by ~1H NMR, ~(13)C NMR, UV and hydrolysis. The molecular weights of the resulting polymers were estimated by viscosity measurement and the extent of ring opening was estimated also by ~1H NMR and hydrolysis of the polymers and further confirmed by UV spectra. 相似文献
19.
Zhi Bin Huang 《Tetrahedron letters》2005,46(20):3461-3464
Unique structures of tetra-crown ethers were successfully synthesized by the reaction of tetramethylolmethane tetraacrylate (TMMT) reacted with crown ethers containing primary amine functional group such as 2-aminomethyl crown ethers and 4-aminobenzo crown ethers; containing secondary amine group like 1-aza crown ethers through Michael reaction. The newly synthesized tetra-crown ethers were characterized by 1H NMR, 13C NMR, FAB mass spectrum, elemental analyses, IR, respectively. 相似文献