共查询到20条相似文献,搜索用时 15 毫秒
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Mine Sulak Ak Hasalettin Deligöz 《Journal of inclusion phenomena and macrocyclic chemistry》2006,55(3-4):223-228
Azocalix[4]arenes were prepared by linking 4-ethylaniline, 4-n-butylaniline, 4-acetamide aniline and 2-aminothiazol to calix[4]arene through a diazo-coupling reaction. A new family of azocalix[4]arenes, L1–L12, have been prepared by the incorporation of acetyl, benzoyl, and methyl ketone units to azocalix[4]arene. Characterization of the synthesized compounds was carried using elemental analyses, UV–Vis, IR and 1H NMR spectroscopic studies. 相似文献
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Thia-calix[4]arene hydroxamic acids have been synthesized by partial reduction of nitro-thia-calix[4]arenes with hydrazine hydrate, Rn/Ni, and their coupling with benzoyl chloride under the influence of microwave irradiation with 90–95% yield and 3–6 min reaction time. 相似文献
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硫杂杯[4]二醛基衍生物(1)在水合肼中肼解,合成了新化合物硫杂杯[4]二醛腙基衍生物(2);1和2在弱酸的催化下反应合成了新的具有对称结构的苄连氮双硫杂杯[4]芳烃(3);2和3的结构经1H NMR,IR,ESI-MS和元素分析表征. 相似文献
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新型杯[4]芳烃衍生物的合成 总被引:1,自引:0,他引:1
以对叔丁基杯[4]芳烃为起始原料,通过一步或两步取代反应合成了对叔丁基杯[4]芳烃的衍生物(1和2),其结构经FT-IR,^1H NMR,FAB-MS表征. 相似文献
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Ghosh K Semwal A Nayak SK Banerjee SB Banerjee M 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2007,66(4-5):1122-1125
[60]- and [70]Fullerenes have been shown to form 1:1 supramolecular complexes with bis[2-(5,11,17,23,29,35-hexa-tert-butyl-37,38,39,40,41-pentahydroxycalix[6]arenyl-oxy ethyl ether) (1) and 5,11,17,23,29,35-hexa-tert-butyl-37,38,40,41-tetra hydroxyl-39,42-(crown-4)calix[6]arene (2) in CHCl3 medium by electronic absorption spectroscopy. Formation constants (K) of the complexes of [60]- and [70]fullerenes with 1 and 2 have been determined at room temperature from which free energy of formation values of the complexes have been estimated. The very high formation constant value of [60]fullerene/1 complex (5900 dm3 mol-1) in indicative of formation of inclusion complex. Moreover, PM3 calculations reveal that intermolecular interaction between [60]fullerene and 1 proceeds through quite deep energy molecular orbital. 相似文献
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在对叔丁基硫杂杯[4]芳烃的下缘1,3位引入芳醛基, 合成了硫杂杯[4]二醛基衍生物2. 化合物2与苯胺、水杨酰肼、烟酰肼、异烟酰肼等通过席夫碱缩合反应得到新型硫杂杯[4]氮杂衍生物3a~3d, 产率分别为83%, 80%, 77%和79%. 化合物2与邻苯二胺、乙二酰肼、丙二酰肼、己二酰肼等通过“1+1”分子间缩合得到新型1,3-桥联硫杂杯[4]氮杂衍生物4a~4d, 产率53%, 51%, 59%和66%. 新化合物的结构经IR, 1H NMR, MS和元素分析等证实. 相似文献
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Akiko Hori Erina Betsugi Yoshinori Ikumura Kenji Yoza 《Acta Crystallographica. Section C, Structural Chemistry》2019,75(3):265-270
Calix[4]arene and oxacalix[4]arene derivatives have eight possible conformations in the up and down directions of their four aromatic rings from the mean plane of a bridged central ring, the conformations of which determine the functionality of the host frameworks. Despite being a known compound for five decades, oxacalix[4]arene, C24H16O4, has not been characterized previously by crystallographic methods. It crystallizes from hexane/CH2Cl2 solution to give two polymorphs, i.e. prismatic and block‐shaped crystals as twisted 1,3‐alternate structures with S4 and C2 symmetry, respectively. These were previously suggested as the prefered stable conformations by density functional theory (DFT) calculations. 相似文献
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Fumio Hamada Simon G. Bott G. William Orr Anthony W. Coleman Hongming Zhang Jerry L. Atwood 《Journal of inclusion phenomena and macrocyclic chemistry》1990,9(3):195-206
Bromocalix[4]arene methyl ether serves as a precursor in the synthesis of the title thiocalixarene via the reagent CuSEt. Ethylthiocalix[4]arene methyl ether crystallizes in the monoclinic space groupP21/c witha = 20.577(9),b, = 10.722(5),c = 20.315(9) Å, = 120.46(4)°, andD
c = 1.24 g cm–3 forZ = 4. Refinement based on 1441 observed reflections led toR = 0.080. The configuration of the calixarene lies between the partial cone and the 1,3-altemate conformations. Bromocalix[4]arene methyl ether crystallizes in the triclinic space groupPI witha = 12.283(7),b = 17.658(9),c = 18.118(6) Å, = 90.25(6), = 105.95(4), = 105.11(6)°, andD
c = 1.68 g cm–3 forZ = 4. Refinement based on 3028 observed reflections led toR = 0.083. The unit cell also contains four CHCl3 molecules which exist pairwise enclathrated by six calixarenes. The partial cone conformation of the bromocalixarene is identical to that of ethylthiocalix[4]arene methyl ether. 相似文献
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Jiang-Tao Li Yu-Fei Ao Qi-Qiang Wang De-Xian Wang Mei-Xiang Wang 《Tetrahedron letters》2017,58(38):3708-3711
Reaction of azacalix[4]pyridine and azacalix[1]arene[3]pyridine with methyl iodide afforded N-methylated products selectively and highly efficiently. Crystal structures revealed that the modified electronic nature of the pyridines could change the conjugation between the bridging nitrogen and the neighbouring aromatics. 相似文献
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Peter Timmerman Sybolt Harkema Gerrit J. Van Hummel Willem Verboom David N. Reinhoudt 《Journal of inclusion phenomena and macrocyclic chemistry》1993,16(2):189-197
The formation of a stable calix[4]arene monohemiketal is described. X-ray crystallographic data provide conclusive evidence for the presence of a stabilizing hydrogen bond.
Supplementary Data. Lists of H-atom parameters and bond lengths and angles involving hydrogens have been deposited with the British Library Document Supply Centre as Supplementary Publication No. SUP 82159 (5 pp.). 相似文献
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Serkan Sayin Gülderen Uysal Akkuş Radek Cibulka Ivan Stibor Mustafa Yilmaz 《Helvetica chimica acta》2011,94(3):481-486
The synthesis of two new flavin substituted calix[4]arene derivatives, 9 and 10 , is described. The first flavin substituted calix[4]arene derivative 9 was synthesized by the reaction of 3‐methylalloxazine ( 5 ) with 25,27‐bis(3‐bromopropoxy)‐26,28‐dihydroxy‐5,11,17,23‐tetra(tert‐butyl)calix[4]arene ( 4 ) in high yield (92%). The other derivative 10 was prepared from 3‐methylalloxazine‐1‐acetic acid ( 7 ) and 25,27‐bis(3‐cyanopropoxy)calix[4]arene ( 3 ). All new compounds were characterized by a combination of FT‐IR and 1H‐NMR spectroscopy, and elemental‐analysis techniques. 相似文献
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IthasbeenshownthatcalixarenescanperformselectiveiontranspoFtandformneutralcomplexeswithcanonsthroughprotonlossl.Olmsteadreported'thesynthesisandXraycrystalstructuresofTitanium(IV),Iron(ill)andCobalt(II)complexesofp-tertbutylcalix[4]areneandfoundthatacompleteexchangeofallfourOHgroupsinp-lertbutylcalix[4]arenetookplacewhentreatedwithTi(NMe=).togivethearyloxocomplex[{Ti(p-lerl-butylcalix[4]arene)},]'6whichmaybeformallydescribedasacentrosymmetrictitaniumaryloxidedimerconsistingoftwoTi(P-lerl… 相似文献