Natural products taurine and homotaurine were immobilized on the hybrid silica successfully and characterized by FT-IR, XPS, contact angle measurement, SEM, TGA, and XRD systematically. When the immobilized taurine ([email protected]) and homotaurine ([email protected]) were employed as heteroge...

The title compounds were examined as antioxidants for polypropylene in oven-ageing studies. It was shown that the activity was in the order sulphoxide > sulphide > sulphone. This activity is justified by the mechanisms that have been proposed for stabilisation by phenolic sulphur compounds.

We have measured the solid state nuclear magnetic resonance (NMR) 1H spin-lattice relaxation rate from 93 to 340 K at NMR frequencies of 8.5 and 53 MHz in 5-t-butyl-4-hydroxy-2-methylphenyl sulfide. We have also determined the molecular and crystal structures from X-ray diffraction experiments. ...

Heme is an abundant and widely existed cofactor for a variety of metalloenzymes, whose broader use is generally impeded by its high instability and poor solubility. Here we report an environment-benign and efficient strategy for the sulfonium ylide formation and subsequent CS bond cleavage of ar...

The ketene Claisen rearrangement of chiral (2S,3E)-5-(isopropylsulfanyl)-3-penten-2-amines has been investigated by the semi-empirical AM1 method. The observed efficient direction of the 1,2-asymmetric induction in the ketene Claisen rearrangement has been modelled from comparison of the energie...

The addition of organolithium compounds to (vinylthio)benzene (1) and then an electrophilic quenching followed by a further metalation/electrophilic quenching is a general method to prepare in one pot (alkylthio)benzenes ortho, alpha-substituted with equal or different groups. The direct dimetal...

4-MeOC6H4Te−Na+ and Te2− generated in situ by reduction of (4-MeOC6H4Te)2 and elemental Te, respectively, with sodium borohydride on reaction with 2-[3-(2-chloroethoxy)propyl]-6-methylpyridine in N2 atmosphere results in 1-(4-methoxyphenyltelluro)-2-[3-(6-methyl-2-pyridyl)propoxy]ethane (L1) 2-m...

Films of poly[(3-butylthio)thiophene] were prepared via Langmuir–Blodgett (LB) deposition and casting techniques for applications in gas sensor devices. A description of the preparation of the sensing layer is given for both methods: the LB deposition of the polymer in mixture with arachidic ac...

A convenient synthesis of α,β- and α,β,γ,δ-unsaturated aldehydes using readily accessible 4-(t-butylthio)-3-buten-2-one as synthon was described.

Films of poly[3-(butylthio)thiophene] were prepared via Langmuir–Blodgett (LB) deposition for applications in gas sensor devices. A description of the LB deposition of the sensing layer starting from a mixture of polymer and arachidic acid is given. Alumina substrates equipped with gold interdi...

Isorenieratene has been efficiently synthesized using 4-(t-butylthio)-3-buten-2-one as chain lengthening agent.

A novel magnetically recoverable thioporphyrazine catalyst (CoPz(S-Bu)8/SiO2@Fe3O4) was prepared by immobilization of the cobalt octkis(butylthio) porphyrazine complex (CoPz(S-Bu)8) on silica-coated magnetic nanospheres (SiO2@Fe3O4). The composite CoPz(S-Bu)8/SiO2@Fe3O4 appeared to be an active ...

Considering that some thiopyrimidines were previously reported as potential therapeutics, the present study achieved novel analogs of bioactive 2-substituted thiopyrimidines-4-(3H)-ones via base catalyzed alkylation reaction of 2-thiouracil using alkyl and aralkyl bromides. The title compounds w...

Butylthio[2.2.2](LY297802 / NNC11-1053) is a mixed muscarinic cholinergic receptor agonist/antagonist that produces antinociception in mice and rats. As such, butylthio[2.2.2] may have therapeutic utility in the treatment of pain. Butylthio[2.2.2] was fully efficacious in the mouse grid shock, w...

Reaction of dichlorotetrakis(dmso)ruthenium(II) with methoxydiphenylphosphane in refluxing methanol gave dichlorotris-(methoxydiphenylphosphane)ruthenium(II) which dimerizes. The structure of the dimer was established by NMR and X-ray diffraction analyses; this ruthenium complex catalyzed the ox...

In the homogeneous hydrogen transfer from 1-phenyl-ethanol(D) to cyclohexanone(A) catalyzed by RuCl2(PPh3)3(C) in diphenyl ether as solvent at 140 °C the order of addition of donor, acceptor and catalyst have a pronounced effect on the rate of the reaction. An induction period is observed. The ...

The addition of haloalkanes to alkenes in the presence of [RuCl2(PPh3)3] has been subjected to a detailed kinetic study. The results of this study, together with an examination of reaction intermediates, suggest a mechanism inolving a non-chain sequence in which [RuCl2(PPh3)3] acts as a catalyst...

Cyclohexanone has been used as an acceptor for the dehydrogenation of some natural products in the presence of RuCl2(PPh3)3. Only menthol undergoes appreciable dehydrogenation when compared to cholesterol and β-citronellol. Menthone, cholest-4-en-3-one and cholest-1,4-diene-3-one and citronella...

Three ruthenium catalysts were investigated for the metathesis reaction of methyl soyate. Dichlorotris (triphenylphosphine) ruthenium II and bis (tricyclohexyl phosphine) benzylidine ruthenium (IV) dichloride displayed no reactivity at 40 °C and atmospheric pressure. However, ruthenium [1,3-bis...

Cyclisation of a variety of halo-enamides with copper(I) or ruthenium(II) complexes has been investigated. The regioselectivity of the radical cyclisation, which can proceed via either a 4-exo or 5-endo pathway, to form β- or γ-lactam products respectively, is determined by the nature of the m...