نتایج جستجو برای: sulphonatocalix 6 arene

تعداد نتایج: 958752  

Journal: :Chemical communications 2014
Yannick Tauran Christophe Anjard Beomjoon Kim Moez Rhimi Anthony W Coleman

Three large negatively charged organic host molecules; β-cyclodextrin sulphate, para-sulphonato-calix[6]arene and para-sulphonato-calix[8]arene have been shown to be effective inhibitors of endonuclease in the low micromolar range, additionally para-sulphonato-calix[8]arene is a partial inhibitor of rhDNase I.

Journal: :Journal of the American Society for Mass Spectrometry 2002
Michele M Stone Andreas H Franz Carlito B Lebrilla

Non-covalent inclusion complexes formed between amino acids and derivatized calix[6]arenes are observed in MALDI mass spectrometry. The methyl, ethyl, and propyl ester derivatives of calix[6]arene yielded amino acid complexes, while the smaller calix[4]arene analogs did not. Similarly the underivatized calix[6]arene and calix[4]arene did not produce complexes. Amino acid complexes were observed...

Journal: :Chemistry 2014
Serena Orbisaglia Corrado Di Nicola Fabio Marchetti Claudio Pettinari Riccardo Pettinari Luísa M D R S Martins Elisabete C B A Alegria M Fátima C Guedes da Silva Bruno G M Rocha Maxim L Kuznetsov Armando J L Pombeiro Brian W Skelton Alexandre N Sobolev Allan H White

[RuCl(arene)(μ-Cl)]2 dimers were treated in a 1:2 molar ratio with sodium or thallium salts of bis- and tris(pyrazolyl)borate ligands [Na(Bp(Br3))], [Tl(Tp(Br3))], and [Tl(Tp(iPr, 4Br))]. Mononuclear neutral complexes [RuCl(arene)(κ(2)-Bp(Br3))] (1: arene=p-cymene (cym); 2: arene=hexamethylbenzene (hmb); 3: arene=benzene (bz)), [RuCl(arene)(κ(2)-Tp(Br3))] (4: arene=cym; 6: arene=bz), and [RuCl(...

Journal: :Chemical communications 2013
Xiaodong Chi Min Xue Yingjie Ma Xuzhou Yan Feihe Huang

A pillar[6]arene with mono(ethylene oxide) groups was synthesized and it formed a highly stable inclusion complex with diquat, while the pillar[5]arene analogue did not.

Journal: :Journal of medicinal chemistry 2003
Hana Kostrhunova Jakub Florian Olga Novakova Anna F A Peacock Peter J Sadler Viktor Brabec

This work is the first in-depth study of osmium binding to DNA and confirms the pharmacological activity of a new class of anticancer metallodrugs. We investigated the interactions between the potential biological target DNA and four osmium(II) arene complexes, of the type [(eta 6-arene)Os(LL)Cl]n+, where arene = biphenyl or p-cymene and LL = ethylenediamine, picolinate, or oxinate in an effort...

2002
Philip A. Gale Zheng Chen Michael G. B. Drew

New ferrocene substituted calix[4 and 5]arenes have been prepared and the crystal structure of a lower-rim substituted bis ferrocene calix[4]arene (7) has been elucidated. The respective ferrocene/ferrocenium redox-couples of compounds 6 (a calix[4]arene tetra ferrocene amide) and 8 (a calix[5]arene pentaferrocene amide) are shown to be significantly cathodically perturbed in the presence of an...

Journal: :Chemical communications 2012
Tomoki Ogoshi Daiki Yamafuji Takamichi Aoki Tada-aki Yamagishi

A [2]rotaxane constructed from a per-ethylated pillar[6]arene as a wheel and a pyridinium derivative as an axle was prepared. The wheel segment of the per-ethylated pillar[6]arene moved from one station to another along the axle as a result of thermal stimuli.

Journal: :Dalton transactions 2011
Curtis J Czerwinski Ilia A Guzei Kevin M Riggle Jason R Schroeder Lara C Spencer

The para-aminobiphenyl compound [(η(6)-C(6)H(5))(C(6)H(4)-4-NH(2))]Cr(CO)(3) (1) has an arene-phenyl dihedral angle of 38.01(6)°, as determined by single-crystal X-ray crystallography, and 34.7(11)°, as determined by DFT calculations. It undergoes haptotropic rearrangement at 140 °C in solution to form [(η(6)-C(6)H(4)-4-NH(2))(C(6)H(5))]Cr(CO)(3) (2), even though previous reports have suggested...

Journal: :Dalton transactions 2015
Yang Zhang Wei Zheng Qun Luo Yao Zhao Erlong Zhang Suyan Liu Fuyi Wang

We have recently demonstrated that complexation with (η(6)-arene)Ru(II) fragments confers 4-anilinoquinazoline pharmacophores a higher potential for inducing cellular apoptosis while preserving the highly inhibitory activity of 4-anilinoquinazolines against EGFR and the reactivity of the ruthenium centre to 9-ethylguanine (Chem. Commun., 2013, 49, 10224-10226). Reported herein are the synthesis...

Journal: :Dalton transactions 2010
Gilles Montavon Urska Repinc Christos Apostolidis Frank Bruchertseifer Kamel Abbas Alfred Morgenstern

Literature reports of the efficacy of para-sulfonatocalix[6]- and calix[8]-arenes as U(vi) complexants indicated that they might be useful for in vivo chelation of the novel therapeutic alpha-emitter (230)U. We have studied the complexation of U(vi) with para-sulfonatocalix[6]arene and para-sulfonatocalix[8]arene by time resolved laser induced fluorescence spectroscopy and using competition met...

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