Dimethyl sulfonium

This is the most convenient synthesis of carbonyl cyanide [1115-12-4]. The product of (8) and dimethyl sulfide is dimethyl sulfonium dicyanomethyUde... 

Both R and MMA radicals are found to be responsible for the photoinitiation process. Chaturvedi and coworkers [54,55] introduced phenyl dimethyl sulfonium-ylide cupric chloride and chromium thiophene carboxylate as the photoinitiator of styrene and MMA. No reaction mechanism was given for these systems. 

Dimethyl sulfonium-2-pyridyl carbonyl methylide (Ypy-5) [65] initiated radical polymerization of styrene in dimethyl sulfoxide at 85 0.1°C for 6 h under a nitrogen blanket. (See Table 4.)... 

Table 4 Effect of Ylide Concentration on the Rate of Polymerization of Styrene Initiated by Dimethyl Sulfonium 2-Pyridyl Carbonyl Methylide...

This simple procedure resulted in 2H-azirines exclusively in high yields and with retention of chirality at C-2 [24]. Mechanistically, this oxidative synthesis of azirines can be rationalized by invoking the intermediacy of chloro-dimethyl-sulfonium chloride (Me2SCl+- Cl ), which then reacts with the aziridine as indicated in Scheme 12. 

P3.03.32. SODIUM ETHOXIDE AND ETHYL DIMETHYL SULFONIUM IODIDE... 

Data have been reported for the reaction at 64 C between sodium ethoxide (A) and ethyl dimethyl sulfonium iodide CB] using ethanol as a solvent. 

Als Beispiel sei die bimolekulare Spaltung des tert.-Amyl-dimethyl-sulfonium-athylats angefiihrt (65) ... 

Fig. 3.15. Preparation and thermolysis of (dimethyl.sulfonium)methyl iron complexes [468].

Synthesis of racemic naproxene Friedel-Crafts acylation (aluminum chloride - nitrobenzene) of p-naphthol methyl ether affords 2-acetyl-6-methoxy naphthalene, which, when treated with either dimethyl sulfonium or dimethylsulfoxonium methylide, gives 2-(6-methoxynaphthalen-2-yl)propylene oxide. Treatment of the latter with boron trifluoride etherate in tetrahydrofuran gives 2-(6-methoxynaphthalen-2-yl)propionaldehyde, which is oxidized using Jones reagent (4 M chromic acid) to yield the racemic 2-(6-methoxynaphthalen-2-yl)propionic acid. 

Stabilized sulfur ylides have been obtained very early as dimethyl sulfonium fiuorenylide [200]. 

We have mentioned previously as a stable ylide dimethyl sulfonium fluorenide (see Section 2.9). It yielded the first example (1938) of a [2,3] sigmatropic rearrangement of a sulfur ylide [505, 506] (Sommelet-Hauser rearrangement). 

Bromopentacarbonylmanganese, 49 tom -Bromotetracarbonyl(methyl-methylidyne)chromium, 50 frmethylidyne)tungsten, 49 Carbonylhydridotris(triphenylphosphine)-rhodium(I), 329 Chromium carbonyl, 51 Decacarbonyldimanganese, 49 Dicarbonylcyclopentadienylcobalt, 96 Dicarbonyl(cyclopentadienyl)[(dimethyl-sulfonium)methyl]iron(II) tetrafluoroborate, 98... 

Keywords methyl 2-(methylthio)benzenesu Ifonate, rearrangement, 2-(dimethyl-sulfonium)benzenesulfonate... 

Dodecyl dimethyl sulfonium methyl sulfate cyproconazole DSMA cacodylic acid... 

Iverson RL, Nearhoof FL, Andreae MO (1989) Production of dimethyl-sulfonium propionate and dimethylsulfide by phytoplankton in estuarine and coastal waters. Limnol Oceanogr 34 53-67... 

Chloroethyl(dimethyl)sulfonium iodide, ClCH2CH,S(CH,)2l (1). The salt, m.p. BBSS , is prepared by reaction of 2-chloroethyl methyl sulfide with CH,I. ... 

Example. The reaction of sodium ethoxide, NaOC2H6, with ethyl dimethyl sulfonium iodide, (C2H6)(CH3)2SI, in absolute ethanol solution has been shown to lead to the following products ... 

Synthesis of faranes. 3- or 3,4-Substiluted furanes can be prepared in good yield by the reaction of the n-butylthiomethylene derivatives of ketones with dimethyl-sulfonium methylidc (equation I). 

N-Metkylation ofindoles Indoles can be selectively N-methylated by dimethyl-sulfonium methylide in THF at room temperature. 

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