- Synthetic and electrochemical studies on electroactive ionophores based on the di-η-cyclopentadienyl-molybdenum and -tungsten fragments
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The compound reacts with HSCH2(CH2OCH2)3CH2SH in the presence of base giving the metalla-crown ether complex which can undergo a reversible one-electron oxidation.Treatment of (M=Mo or W) with 4'-carboxybenzo-15-crown-5 and base gives the complexes 2>, which also undergo reversible oxidation.Small changes in the E1/2 (2> (M=Mo or W) prepared from the sodium salt of (benzo-15-crown-5) -4'-thiol and , undergo a reversible one-electron oxidation and the E1/2 is shifted anodically upon addition of alkali metal cations.
- Fu, Enqin,Granell, Jaume,Green, Malcolm L.H.,Lowe, Valerie J.,Marder, Seth R.,et al.
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- Application of HPLC for the screening of separation of new macrocyclic systems
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The efficient synthesis of new macrocyclic systems via nucleophilic ring opening reaction of epoxides by thiols was described. Initially new macrocyclic compounds were obtained as a mixture of diastereomers. Preparative thin layer chromatography was applied to separate meso and pairs of enantiomer. The identification of products using a chiral HPLC column and mass spectroscopy was utilized.
- Stefaniak, Monika,Romański, Jaros?aw
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p. 245 - 248
(2017/01/22)
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- Optimized methods for preparation of 6I-(ω-sulfanyl-alkylenesulfanyl)-β-cyclodextrin derivatives
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A general high-yielding method for the preparation of monosubstituted β-cyclodextrin derivatives which have attached a thiol group in position 6 is described. The thiol group is attached through linkers of different lengths and repeating units (ethylene glycol or methylene). The target compounds were characterized by IR, MS and NMR spectra. A simple method for their complete conversion to the corresponding disulfides as well as a method for the reduction of the disulfides back to the thiols is presented. Both, thiols and disulfides are derivatives usable for well-defined covalent attachment of cyclodextrin to gold or polydopamine-coated solid surfaces.
- Bedná?ová, Eva,Hybelbauerová, Simona,Jind?ich, Jind?ich
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p. 349 - 352
(2016/04/05)
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- Amphiphilic silicone architectures via anaerobic Thiol-Ene chemistry
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Despite broad application, few silicone-based surfactants of known structure or, therefore, surfactancy have been prepared because of an absence of selective routes and instability of silicones to acid and base. Herein the synthesis of a library of explic
- Keddie, Daniel J.,Grande, John B.,Gonzaga, Ferdinand,Brook, Michael A.,Dargaville, Tim R.
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p. 6006 - 6009
(2012/01/06)
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- Synthesis and extraction properties of oxathiacrown compounds containing benzyl groups
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8-Benzyl-1.4-dioxa-7,10-dithiacyclododecane and 11-benzyl-1,4,7-trioxa-10, 13-dithiacyclopentadecane were obtained by the interaction of (2,3-dibromo-1-propyl)benzene with 1,8-dimercapto-3,6-dioxaoctane and 1,11-dimercapto-3,6,9-trioxaundecane. The extrac
- Rezekina,Rakhmanov,Lukovskaya,Bobylyova,Abramov,Chertkov,Khoroshutin,Anisimov
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p. 216 - 220
(2007/10/03)
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- The synthesis and complexation studies of thia-anthracene receptors
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Systematic studies towards the formation of thia-anthracene receptors were performed. Anthracene podand 3 consisting of two anthryl groups connected by the SCH2CH2CH2S spacer group was prepared in 99% yield. The complexation properties of this compound were investigated using UV-VIS and fluorescence titration techniques. Addition of silver salts into a solution of the fluorophore strongly modifies the absorption and fluorescence spectra and the association constants were found to be K1 = 2 x 105 and K2 = 8 x 104 M-1 for the 1:1 and 1:2 complexes, respectively. Addition of metal ions, as Cu2+ Zn2+, Cd2+, Hg2+, Ni2+, and Co2+, did not lead to any change in the photophysical properties of compound 3.
- Ostaszewski, Ryszard,Prodi, Luca,Montalti, Marco
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p. 11553 - 11562
(2007/10/03)
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- Process for the preparation of 2-mercaptoalkyl-sulphides and 2-mercaptoalkylethers
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2-Mercaptoalkylsulphides and 2-mercaptoalkylethers are obtained by the hydrazinolysis of 3-thiaalkylisothiuronium salts and 3-oxaalkylisothiuronium salts.
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