Dimethylsulf oxide

Kondo maintained his interest in this area, and with his collaborators [62] he recently made detailed investigations on the polymerization and preparation of methyl-4-vinylphenyl-sulfonium bis-(methoxycarbonyl) meth-ylide (Scheme 27) as a new kind of stable vinyl monomer containing the sulfonium ylide structure. It was prepared by heating a solution of 4-methylthiostyrene, dimethyl-diazomalonate, and /-butyl catechol in chlorobenzene at 90°C for 10 h in the presence of anhydride cupric sulfate, and Scheme 27 was polymerized by using a, a -azobisi-sobutyronitrile (AIBN) as the initiator and dimethylsulf-oxide as the solvent at 60°C. The structure of the polymer was confirmed by IR and NMR spectra and elemental analysis. In addition, this monomeric ylide was copolymerized with vinyl monomers such as methyl methacrylate (MMA) and styrene. 

Die Reduktion geminaler Dibrom-cyclopropane mit Chrom(II)-acetat in Dimethylsulf-oxid fiihrt (in Abhangigkeit von Zeit und Temperatur) zu wechselnden Mengen an Brom-cyclopropanen. Aus 2,2-Dibrom-1,1-diphenyl-cyclopropan entsteht dagegen ausschlieB-lich 1,1 -Diphenyl-allen (s. S.517), in waBr. Dimethylformamid entstehen zusatzlich Aeetoxy-Derivate4 ... 

In addition to pure water, we extended our investigation on solvated Li+ to NH3 (90), NH3-H20 mixtures (91), dimethylsulf-oxide (DMSO) (92), DMS0-H20 mixtures (92), HCN and CH3CN, and their mixtures with water (93). For NH3 as a water-like solvent, all published X-ray structures are tetrahedrally coordinated, [Li(NH3)4] + (94-97). Therefore, we expect to have [Li(NH3)4]+ in solution. The validity of this assumption is also supported by the exchange mechanism. In the case of DMSO, a variety of theoretical and experimental studies on liquid DMSO (98-104), DMSO-water mixtures (105-110), DMSO-non-aqueous... 

Diffusion coefficients of Pb(II) determined in organic solvents - dimethylsulf-oxide and hexamethylphosphoramide -are about 1 order of magnitude lower than in aqueous solutions [33, 34, 37]. 

Aus tertiaren Nitro-Verbindungen sind mit Natriumsulfid und Schwefel in Dimethylsulf-oxid nach anschlieBender Behandlung mit amalgiertem Aluminium bei 0° Alkanthiole in guten Ausbeuten zuganglich7 ... 

Jeong and co-workers reported the activation of molybdenum hexacarbonyl in situ by the aid of dimethylsulf-oxide. A mixture of the substrate and Mo(CO)6 (l.Oequiv.) together with the excess of DMSO (lOequiv.) in toluene and/or benzene was heated to give the corresponding products. 

A new spectral species of indolamineoxygenase having absorption maxima at 415,542 and 576 nm is observed when potassium superoxide dissolved in dimethylsulf-oxide is slowly infused into a solution containing the native ferric form of enzyme1895. 

Next, we must recognize that many molecules that we ordinarily think of as exhibiting neither acidic nor basic behavior are in fact acids or bases, or, frequently, both. For example, acetone, which is neutral in water solution, reacts as a base in sulfuric acid according to the equilibrium 3.11 and in dimethylsulf-oxide containing sodium methoxide, acetone is an acid (Equation 3.12).5... 

The broad band decoupled carbon-13 NMR spectrum of cimetidine hydrochloride (Figure 3) was obtained by using a solution of approximately 100 mg/ml in deuterated dimethylsulf oxide. The deuterium signal of dimethylsulfoxide was used as the internal reference and the spectrum was obtained on a Varian Associates Model FT-80 fourier transform NMR spectrometer. The chemical shift assignments are ... 

Abbreviations THF, tetrahydrofuran DMF, N, A-dimethylformamide DMSO, dimethylsulf oxide HMPT, hexametapol ... 

Cre CV1 DEAE-dextran DHFR DMSO DNA DOPE DOSPA recombinase (cyclization recombination) African green monkey kidney cells diethylaminoethyl-dextran dihydrofolate reductase dimethylsulf oxide deoxyribonucleic acid dioleoylphosphatidyl ethanolamine 2,3-dioleoyloxy-/V-[2(sperm inecarbox-amido)ethyl]-/V,TV-dimethyl-1-... 

Preparation of Cellulose-Styrene-Sulfur Dioxide Graft Copolymer (Homogeneous Grafting). The procedure for preparation of cellulose-styrene copolymer in a S0 -diethylamine (DEA)-dimethylsulf-oxide (DMS0) medium was described in our previous paper (3). The grafting proceeds homogeneously throughout the reaction. 

Simo R, Vila-Costa M (2006) Ubiquity of algal dimethylsulf-oxide in the surface ocean Geographic and temporal distribution patterns. Mar Chem 100 136-146... 

A simple method of chemical modification of cellulose was proposed by Zhdanov and coworkers [126]. This method was based on the hydrophobic mercerization of cellulose in a superbasic medium such as the dimethylsulf-oxide-solid sodium hydroxide mixture, followed by etherification or esterification. Methyl sulfate, benzyl chloride, acetic anhydride, methyl bromoacetate, triethyleneglycol ditosylate, and p-toluenesulfonyl chloride were used as the modification agents. This method simplified appreciably the preparation of acetylcellulose and methoxycarbonylmethylcellulose. Cellulose ethers can be prepared with high etherification yield, uniform substitution, and good oxidation resistance by alkalinization and alkylation of aqueous cellulose in the presence of water-miscible cyclic ethers as suspending agents [127]. 

Embery, G. and Dugrad, P. H. The isolation of DMSO soluble components from human epidermis preparations A possible mechanism of action of dimethylsulf-oxide in effecting percutaneous migration phenomena. Journal of Investigative Dermatology 57 308-311, 1971. 

OXIDATION, REAGENTS Dimethylsulf-oxide-Acetic anhydride. 1-Amyl hydroperoxide. N-Bromosuccinimide. Ceric ammonium nitrate. Chloramine. o-Chlo-ranil. 1-Chlorobenzotriazole. N-Chloro-succinimide-Dimethyl Sulfide. Chromic acid. Chromic anhydride. Chromyl chloride. Cobalt(ll) acetate. Cupric acetate monohydrate. Cupric nitrate-Pyridhic complex. 2,3-Dichloro-5,6-dicyano-l, 4-benzoquinonc. Dicyclohcxyl-18-crown-... 

AMIDES N-Ethoxycarbonyl-2-ethoxy-l,2-dihydroquinoline (EEDQ). Silicon tetrachloride. Sodium hydride-Dimethylsulf-oxide. Triphenyl phosphite. 

Several compounds can serve as precursors of DMS including dimethylsulfonium compounds such as dimethylsulfoniopropionate (DMSP), S-containing amino acids, MeSH, dimethylsulf-oxide (DMSO), and methoxylated aromatic compounds, which are capable of methylating... 

Some of this addition can lead onto dimethylsulf-oxide, which can be detected in the atmosphere (Sciare et al., 2000) ... 

Sciare J., Baboukas E., Haney R., Mihalopoulos N., and Nguyen B. C. (1998) Seasonal variation of dimethylsulf-oxide in rainwater at Amsterdam island in the southern Indian Ocean implications on the biogenic sulfur cycle. J. Atmos. Chem. 30(2), 229-240. 

However, in this case other causes such as dimethylsulf-oxide (DMSO) or plasma used while processing the autologous bone marrow for freezing could not be excluded. 

Hexachlorophene is well absorbed orally and dermal-ly and through mucosal surfaces. In rats, up to 55% of dermally applied hexachlorophene is absorbed in 24 h. Dermal absorption is enhanced by dimethylsulf-oxide and dermatitis or skin abrasions. Placental transfer has been demonstrated in rats. Hexachlorophene is converted to hexachlorophene-jS-o-glucuro-nide in the rat and rabbit. Some hexachlorophene has been found in the blood and adipose tissue. Hexachlorophene was administered intraperitoneally to rats and rabbits excretion was slow and most (48-83%) was excreted unchanged in the feces. Hepatic function is an important determinant in the removal of hexachlorophene. In a rat study, within 3h after administration, 50% was excreted in the bile. Rats given intraperitoneal doses excreted 5 % of the dose in the urine and none as CO2 more than 70% of the material was excreted in feces. 

Potassium permanganate. Dimethyl sulfide-Chlorine. Dimethyl sulfoxide. Dimethyl sulfoxide-Chlorine. Dimethylsulf-oxide Sulfur trioxide. Dipyridine chro-mium(VI) oxide. Iodine. Iodine-Potassium iodide. Iodine tris(trifluoroacetate). Iodosobenzene diacetate. Isoamyl nitrite. Lead tetraacetate. Manganese dioxide. Mercuric acetate. Mercuric oxide. Osmium tetroxide—Potassium chlorate. Ozone. Periodic acid. Pertrifluoroacetic acid. Potassium ferrate. Potassium ferricyanide. Potassium nitrosodisulfonate. Ruthenium tetroxide. Selenium dioxide. Silver carbonate. Silver carbonate-Celite. Silver nitrate. Silver oxide. Silver(II) oxide. Sodium hypochlorite. Sulfur trioxide. Thalli-um(III) nitrate. Thallium sulfate. Thalli-um(III) trifluoroacetate. Triphenyl phosphite ozonide. Triphenylphosphine dibromide. Trityl fluoroborate. 

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