The relation between the mixed-valence state and crystal structure of iodide salts for 1′,1‴-bis(α- and β-naphthylmethyl)-1,1″-biferrocenes has been studied by means of 57Fe Mössbauer spectroscopy and X-ray structural analysis. Time change of 57Fe Mössbauer spectroscopy was first observed fo...

Sodium nitroprusside (SNP) has been reported to be a potent stimulator of cGMP formation in different tissues, including pancreatic islets. The present study aimed at comparing the effects of sodium nitroprusside and dibutyryl cGMP on 86Rb outflow, 45Ca outflow, short-term 45Ca uptake, cytosolic...

This review presents a systematic survey of the literature (through the end of 2014) for de novo syntheses of 3-pyrrolin-2-ones from acyclic precursors or via transformation of other cyclic systems such as pyrroles, pyrrolidinone, and maleimides. One-component intramolecular cyclization approach...

1,4 - Dimethyl - 2 - nitro - 3 - phenylsulphonylnaphthalene (2) reacts with sodium benzenethiolate in DMSO at 120° to give 1 - methyl - 2 - nitro - 4 - phenylthiomethylnaphthalene (4) [tele-substitution product (TSP) of the phenylsulphonyl group] and 1,4 - dimethyl - 3 - phenylsulphonyl - 2 - p...

Trans-1,2-bis(phenylsulphonyl)ethylene (7) is a valid alternative to maleic anhydride since it possesses comparable dienophilic reactivity and its adducts can be desulphonylated by reductive processes while those of maleic anhydride need oxydative conditions.

Several 2-phenylsulphonyl-piperidines and -pyrrolidines were prepared from the corresponding N-acyl aminals by treatment with benzenesulphinic acid. On reaction with various carbon nucleophiles these sulphones gave good yields of substitution products. Typical nucleophiles used in these studies ...

Two series of phenylsulphonyl urenyl chalcone derivatives (UCH) with various patterns of substitution were tested for their effects on nitric oxide (NO) and prostaglandin E2 (PGE2) overproduction in RAW 264.7 macrophages. None of the tested compounds reduced NO production more than 50% at 10 μM...

1-Phenylsulphonyl-1-phenylthio epoxides (3), readily prepared from aldehydes, react with lithium or magnesium halides to give high yields of the corresponding α-halo S-phenyl thio esters.

The coupling reaction of phenylsulphenyl- phenylsulphinyl- and phenylsulphonyl-pentadienyl metals 3a-g has been studied showing that while 3c-g couple in any case regioselectively and stereoselectively the coupling of 3a-b is countercation and electrophile dependent. The α-regioisomeric couplin...

2-Phenylsulphonyl cyclic ethers undergo facile displacement of the sulphonyl group by alcohols, in the presence of magnesium bromide etherate and sodium bicarbonate in tetrahydrofuran, to give goodyields of the corresponding acetals.

Treatment of methyl 3-phenylsulphonyl orthopropionate with n-BuLi gives the corresponding carbanion which reacts with aldehydes or ketones to yield β-phenylsulphonyl γ-lactones. Base-catalysed elimination of sulphinic acid yields α,β or β,γ-butenolides.

Reaction of 2-phenylsulphonyl oxiranes(1) with butyllithium in the presence of chlorotrimethylsilane gave 2-phenylsulphonyl-2-trimethylsilyl oxiranes(2), which on treatment with MgBr2Et2O gave 2-bromoacylsilanes(3) and either bromovinyl sulphones(5) or α,β-unsaturated acylsilanes(6) and 2-trim...

Conditions are reported for the alkylation and acylation alpha to the sulphonate of a butyrolactone carrying a 5-phenylsulphonyl group. Yields are good if the alkyl or acyl halide is sufficiently reactive. The phenylsulphonyl group is initially retained and studies of its elimination are describ...

Catalytic endothermic reactions of exo-tetrahydrodicyclopentadiene (exo-THDCP) with different zeolites were investigated in a batch reactor to increase the heat of reaction. The heat of reaction with each zeolite was calculated by the NIST SUPERTRAPP program. The conversion and product distribut...

Aminoethyl 3-chlorobenzyl ether (3), synthesized by the reaction of 3-chlorobenzyl bromide with aminoethanol and NaH, was shown to be a time-dependent reversible inactivator of both monoamine oxidase A and B. The selectivity for inactivation of monoamine oxidase B, as measured by (kinact/KI)B/(k...

New chiral N,N-bidentate ligands derived from substituted 2-(4-isopropyl-4-methyl-4,5-dihydro-1H-imidazol-5-one-2-yl)pyridines have been prepared and characterised by means of 1H, 13C NMR spectroscopy and optical rotation. Their Cu(II) complexes were characterized by means of elemental analysis,...

A novel bispyrazole derivative 2,6-bis(5-(4-methylphenyl)-1-H-pyrazol-3-yl)pyridine was synthesized and its structure was confirmed by 1H NMR, FTIR, MS techniques and elemental analysis. The binding interactions of BMPP with Cd2+, Co2+, Pb2+ and Cu2+ ions were investigated in MeOH–H2O solution ...

The synthesis, characterization, DFT and, in two cases, the structure of seven novel dichloro(bis{2-[1-(4-methylphenyl)-1H-1,2,3-triazol-4-yl-κN3]pyridine-κN})metal(II) coordination compounds ([M(L2)2Cl2]), containing transition metals of groups 7–12, are described. Both experimentally measur...

A novel ion exchange process was studied to remove high concentration of Cu impurity from AgNO3 electrolyte was studied. A suitable ion exchange resin was screened using laboratory scale experiments with a synthetic nitrate electrolyte solution of the following composition: 80.5–90.3 g/L Ag and...

This work shows the technical feasibility to recover uranium and molybdenum from industrial copper leaching solutions (PLS). Both were obtained as by-products from hydrometallurgical operations of the Chilean copper mining industry, using the ion exchange technique. This process recovered uraniu...