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1.
Sofiane Ben Sdira Marie-Béatrice Giudicelli Francis Vocanson Monique Perrin Roger Lamartine 《Tetrahedron letters》2005,46(34):5659-5663
A new family of p-tert-butylcalix[4]arenes functionalized at the lower rim with α-ketoamide or α-hydroxyamide functions has been prepared. The 1H and 13C NMR spectra indicate that the macrocycles preferably adopt a cone conformation. X-ray crystal study of the α-ketoamide derivative 4a shows the flattened cone conformation in the solid state. Reduction of α-ketoamide 4ab has produced the α-hydroxyamide derivatives 6ab. The introduction of chiral moieties on the lower rim position of the calix[4]arene allowed the synthesis of the chiral derivatives 7 and 8. Host-guest complexation properties towards various anions of the chiral α-hydroxyamide 8 have been examined by 1H NMR spectroscopy. This new receptor has shown promising selectivity for and N-tosyl-(L)-alaninate. 相似文献
2.
LIU Shunying WANG Fajun WEI Lanhua XIAO Wang MENG Lingzhi & HE Yongbing Department of Chemistry Wuhan University Wuhan China 《中国科学B辑(英文版)》2004,(2)
~~Synthesis and anion recognition of neutral receptors based on multiamide calyx[4]arene~~ 相似文献
3.
Baocheng Yang Chengbin Wang Bangtun Zhao Shusheng Zhang 《International journal of environmental analytical chemistry》2013,93(15):1776-1785
A new voltammetric sensor, based on a new p-tert-butylcalix[4]arene derivative (TCAD) modified glassy carbon electrode (GCE) using Langmuir–Blodgett (LB) technique, was designed successfully and used for recognition and determination of Ag+. The π?-?A isotherms suggested that the monolayer of TCAD can coordinate with Ag+ at the air–water surface. Under the optimum experimental conditions, this voltammetric sensor shows a linear voltammetric response for Ag+ in the range of 1.0?×?10?8?~?6.0?×?10?6?mol?L?1 with detection limit 5.0?×?10?9?mol?L?1. The high sensitivity, selectivity, and stability of this LB film modified electrode also demonstrate its practical application for a simple, rapid and economical determination of Ag+ in water sample. 相似文献
4.
Jian Quan LU Li ZHANG Ting Quan SUN Gui Xiang WANG Ling Yan WU 《中国化学快报》2006,17(5):575-577
We report a novel calixarene derivative using 4-bromomethyl-7-methoxycoumarin as the pre-organized unit and apply it to investigate selectively discriminate L-tryptophan from other amino acids in DMF-acetonitrile. 5, 11, 17, 23-Tetra-tert-butyl-25,27-bis-… 相似文献
5.
Synthesis of Schiff Base Calix [4] arene Crowns 总被引:2,自引:0,他引:2
This letter reports the synthesis of Schiff base calix [4] arene crowns containing m-xylylene phenol subunit, in which calix [4] arene Schiff base crowns 2a,2b and 2c were formed by 1:1 condensation of calix [4] arene diamine 1 with dialdehydes (2,6-diformyl-4-chlorophenol 3a,2,6-diformyl-4-methylphenol 3b,2,6-diformyl-4-tert-butylphenol 3c)under high dilute condition in refluxing anhydrous ethanol in 65-70% yield. 相似文献
6.
A New Efficient Synthesis of p-Nitrocalix[4]arene 总被引:1,自引:0,他引:1
YongLI JiaSongWANG QiWANG DeShanLI 《中国化学快报》2004,15(4):400-403
A new efficient synthesis of p-nitrocalix[4]arene from calix[4]arene by using nitrogen dioxide is described.The compound is an useful intermediates for the introduction of other functional groups to obtain N containing substituted calix[4]arene.The reaction mechanism is briefly discussed. 相似文献
7.
Amphiphilic cyclodextrin-calixarene conjugates 1 and 2 were synthesized from "click chemistry", and their self-assembly behaviors were investigated by transmission electron microscopy, and atomic force microscopy. The results obtained show that 1 and 2 can self-assemble to form distinctly different aggregations, and the morphology of aggregations critically relies on the polarity and hydrophilicity of the solvent. 相似文献
8.
Fa Fu YANG Xia ZHAO Cui Yu HUANG Hong Yu GUO Si Ning ZHENG Qi PENG 《中国化学快报》2006,17(8):1029-1032
Biscalixarenes, as examples of higher order molecular architectures than normal calixarene derivatives, were studied extensively in the recent years due to they possess two calixarene cavities which have the potential for complexing with two guests in two… 相似文献
9.
The new chromophore compounds with NLO properties were prepared by Knoevenagel condensation from forrnyl or diformyl calix[4/arene and isophorone derivatives in the presence of piperidine and acetic acid, respectively. In these chromophore calix[4]arenes, the ring locked trienes were employed as the conjugation bridge and electron acceptor in D-π-A units. The NMR spectra demonstrated that they existed in a cone conformation and consequently non-conjugated D-π-A units could be oriented at nearly the same direction. 相似文献
10.
LIU Xiang LIU Yu-Jie ZHANG Qian-Feng 《结构化学》2005,24(8):952-956
1 INTRODUCTION Resorcin[4]arene is a cyclic tetramer and can be easily obtained by acid-catalyzed condensation of resorcinol with a variety of aldehydes. The all-cis isomer with crown C4v symmetry is mostly isolated by means of alkyl aldehydes[1]. They have been used as starting materials for the synthesis of cavitands, velc-rands, and even more complex compounds like carce-rands, hemicarceracnds, and holands[2~4]. Of the ob-vious places for the chemical modification of reso-rcin[4]arene… 相似文献
11.
The bis(calix [4] arene)3 was synthesized in moderate yield by the reaction of p-tert-butylcalix [4] arene (1) with 1,4-bis(chloromethyl) benzene (2). The conformation of all alkylated product 4 was investigated by the variable-temperature ^1H-NMR. 相似文献
12.
A series of calixarene derivatives 2―5 containing heteroatom at the lower rim have been synthesized. 1H NMR studies and crystallographic structures demonstrated that the calix[4]arene derivatives adopted cone conformations. Their cationic binding abilities and selectivities towards heavy and tran- sition metal ions have been evaluated by solvent extraction of aqueous metal picrates. The obtained results indicated that the introduction of nitrogen, sulfur, and/or phosphor atoms to the calix[4]arene framework could effectively enhance their binding ability and selectivity for heavy and transition metal ions, such as Pb2 or Ag . 相似文献
13.
V. A. Dorokhov M. F. Gordeev Z. K. Dem'yanets L. G. Vorontsova M. G. Kurella V. I. Andrianov O. A. Rekhlov 《Russian Chemical Bulletin》1991,40(11):2262-2266
3-Phenyl-5-methyl(phenyl)-1H,3H-pyrimido[4,5:4,5]pyrimido[1,2-a]benzimi-dazole-2,4-diones were obtained by the cyclization of N-phenyl-N-[3-ethoxycar-bonyl-4-methyl(phenyl)pyrimido [1,2-a]benzimidazol-2-yl]ureas by the action of potassium carbonate. 2-Methyl-5-phenyl-1H-pyrimido[4,5:4,5]pyrimido[1,2-a]benzimidazol-4-one was obtained by the reaction of N-3-ethoxycarbonyl-4-phenylpyrimido[1,2-a]benzimidazol-2-yl]-N,N-dimethylacetamidine with ammonium acetate in ethanol. The synthesized compounds are members of a new heterocyclic system. The molecular and crystal structure of the solvate of 3-phenyl-5-methyl-1H,3H-pyrimido[4,5:4,5] pyrimido[1,2-a]benzimidazole-2,4-dione with two molecules of DMF was studied by x-ray crystallographic analysis.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2587–2592, November, 1991. 相似文献
14.
Prosvirkin A. V. Kazakova E. Kh. Habicher V. L. Fedorenko S. V. Mustafina A. R. Konovalov A. I. 《Russian Journal of General Chemistry》2003,73(6):918-920
An effective method for introduction of -phosphonate fragments to a calix[4]resorcinolarene matrix is presented octa(ketophosphonate)calix[4]resorcinolarenes are prepared. The effectiveness of 2,8,14,20-tetramethyl-4,6,10,12,16,18,22,24-octa[3-(dimethoxyphosphoryl)-2-oxopropyl]calix[4]-resorcinolarene for extraction of lanthanum ions from water to chloroform in the presence of picrate ions, accompanied by formation of a complex is demonstrated. 相似文献
15.
16.
LUO Zai-Gang MA Chao WU Li-Mei YUAN Meng-Hong XU Chuan-Hao HU Jing-Song XU Xue-Mei 《结构化学》2014,33(6):865-870
The title complex(C66H76O8·CH3CN) was synthesized and structurally determined by single-crystal X-ray diffraction method. It crystallizes in monoclinic, space group P21/c with a = 22.384(13), b = 13.413(7), c = 21.867(12), β = 112.257(7)°, C68H78NO8, Mr = 1037.31, Dc = 1.133 g/cm3, V = 6076(6) 3, Z = 4, F(000) = 2224, μ(MoKa) = 0.073 mm-1, T = 296(2) K, 10276 independent reflections with 5469 observed ones(I 2σ(I)), R = 0.0797 and wR = 0.2316 with GOF = 1.027(R = 0.1442 and wR = 0.2689 for all data). The calixarene moiety maintains the symmetric cone conformation through intramolecular O–H···O hydrogen bonds. The inhibition of the strand transfer process of HIV-1 integrase of the title compound was also evaluated. Preliminary bioassays indicated that it has a low inhibition ratio(24.85%) at the concentration of 50 μM. 相似文献
17.
Lucia Mutihac Radu Mutihac 《Journal of inclusion phenomena and macrocyclic chemistry》2007,59(1-2):177-181
The extractability together with the transport through liquid membrane of some amino acid methylesters by using p-tert-butylcalix[4]arene as extractant or carrier was studied. In this context, p-tert-butylcalix[n]arenes (n = 6, 8) were found to act as useful carriers or extractant reagents for l-tryptophan methylester and l-tyrosine methylester. The calix[n]arene derivatives used in experiments extracted amino acids methylesters from the aqueous phase into chloroformic phase in
the presence of tropaeolin 00 ([4(4′-anilinophenylazo)benzenesulphonic acid]) as counterion at
. The extraction and the transport depend on the structure of calixarenes, the structure of amino acids, the pH, and the nature
of anion used as ion pair for cation-receptor complexes. The properties of solvent involved in liquid membrane play an important
role in membrane stability and also in selecting membrane systems. The results demonstrated that the inclusion properties
of the investigated hosts are correlated with their structural properties and also they suggest further possibilities for
optimal separation of amino acids derivatives. 相似文献
18.
Xiaomei Zhang Liang Shi Guocai Xu Chaoyue Chen 《Journal of inclusion phenomena and macrocyclic chemistry》2013,75(1-2):147-153
Two new β-CD-calix[4]arene coupling products 3,4 which contained one or two β-CD units in molecules were synthesized by ammonolysis of p-tert-butyl-25,27-dihydroxyl-26,28-di (ethoxy carbonyl methoxyl) calix[4]arene 1 and mono-6-ethylenediamino-6-deoxy-β-CD 2, and their structures were confirmed by 1H NMR, IR and MS (Maldi-Tof). The probable mechanism for forming 3 was discussed also. Using water-insoluble coupling product 3 as an adsorbent, the influences of the adsorption capacities of 3 including initial concentration, temperature and pH onto basic fuchsin (BF) and methylene blue (MB) from aqueous solution were investigated. Results showed that the adsorption capability of 3 to BF was obviously higher than that to MB at similar adsorption conditions. The values of %sorption to BF were over 90 % in range of initial concentrations from 20 to 140 mg L?1 whenas those to MB dropped rapidly from 92 to 58 %. The adsorptions of 3 to both BF and MB obeyed Freundlich adsorption isotherm well. 相似文献
19.
A. Sh. Oganisyan A. S. Noravyan M. Zh. Grigoryan Arzh Sh. Oganisyan 《Chemistry of Heterocyclic Compounds》1999,35(9):1094-1096
New derivatives of pyrano[3,45,6]pyrido[2,3-d]pyrimidines were synthesized from ethyl 2-amino-7,7-dimethyl-7,8-dihydro-5H-pyrano[4,3-b]pyridine-3-carboxylate.A. L. Mndzhoyan Institute of Fine Organic Chemistry, National Academy of Sciences of the Republic of Armenia, Erevan. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1239–1241, September, 1999. 相似文献
20.
Raghunath B. Toche Balasaheb P. Pagar Ravindra R. Zoman Goraksha B. Shinde Madhukar N. Jachak 《Tetrahedron》2010,66(27-28):5204-5211
This paper describes the synthesis of 2,8-dichloroquinolin-4-amine 4 and 4,5,7-trichloro-3-(2-chloroethyl)-2-methylbenzo[h][1,6]naphthyridine 8 as novel class of building blocks. Also describes the regioselective SNAr reactions of 2,4,8-trichloroquinoline 2 on C2 and C4 positions with azide, similarly SNAr reactions of benzo[h][1,6]naphthyridine 8 at C4, C5 positions, and SN2 reactions on C3-(2-chloroethyl) side chain with nucleophiles such as primary aromatic amines, methoxide/ethoxide, and azide at different temperatures. 相似文献