Sulfoxides sulfoxide

Sulfoxides. Sulfoxides, R — SO—R, are named by placing the names of the radicals in alphabetical order before the word sulfoxide. Alternatively, the less senior radical is named followed by sulfinyl- and concluded by the name of the senior group. For example, CH3CH2—SO—CH2CH2CH3 is named either ethyl propyl sulfoxide or l-(ethylsulfinyl)propane. 

Single-Ring Heterocyclic Sulfur Compounds Single-Ring Heterocyclic Sulfur Compounds Tetrachlorothiophene Sodium Strontium Sulfides, Disulfides Dimethyl Disulfide Dimethyl Sulfide Sulfides, Disulfides Sulfonic Acids Sulfonic Acids, Sulfoxides Sulfoxides... 

Phenyl vinyl sulfoxide Sulfoxide, phenyl vinyl (8) Benzene,... 

Deoxygenation of sulfoxides. Sulfoxides arc reduced to sulfides in 75-95% yield by reaction with ClSi(CH,)i and zinc in THF. The reaction is exotherftlic and should be maintained below 30°. 

SULFOXIDES. Sulfoxides arc compounds that contain a sulfinyl group covalently bonded at the sulfur atom to two carbon atoms. They have the general formula RSfO)R, ArS(OtAr, and ArS(Q)R, where Ar and Ar = aryl. Sulfoxides represent an intermediate oxidation level between sulfides and sulfottes. The naturally occurring sulfoxides often are accompanied by the corresponding sulfides or sultones. The only commercially important sulfoxide is the simplest member, dimethyl sulfoxide (DMSO) or sulfinylbismethatie. 

Phytase phosphomono- esterase sulfoxidation sulfoxidation aided by vanadate addition van de Velde, 1998... 

Reduction of sulfoxides. Sulfoxides are rapidly reduced in almost quantitative yields to sulfides by dimethyl sulfide and TFAA. ... 

Reduction of sulfoxides. Sulfoxides are reduced to sulfides in generaily high yield by reaction with 1 equiv. of this reagent in CH2CI2 at room temperature. The reaction times vary from 5-10 minutes to 24 hours. Carbonyl groups do not react. One seienoxide has been reduced in this way. 

Sulfoxides. Sulfoxides (R SO) are neutral electron-donor-type molecules similar to the phosphine oxides. A significant volume of work has shown that long-chain dialkylsulfoxides may have considerable potential utility in actinide separations. Extraction behavior from nitrate systems is similar to that of TBP for some sulfoxides in addition, they offer the possibility of producing less troublesome degradation products than TBP. However, these compounds are not presently available in commercial quantities, and we lack the experience with them that has been amassed with TBP. 

Sulfoxidation. Sulfoxidation Is common in sulfur biochemistry (43,44), and has been observed with many of the transamination products listed in Table III, with mercapturic acids (45,46,47) and cysteine conjugates (12). Sulfoxidation is also common with the methylthio-containing metabolites produced from cysteine conjugates (see "Thiol Formation" below). Sulfoxidation increases the polarity of compounds and therefore affects their excretability. 

Deoxygenation of sulfoxides. Sulfoxides are converted into sulfides in high yield when treated with 1 eq. of iodine and excess pyridine—sulfur dioxide complex in acetonitrile (80 ). If bromine is used, pyridine is omitted in order to... 

Reduction of sulfoxides. Sulfoxides are reduced rapidly and generally in high yield to sulfides by this reagent. Sulfones require prolonged reactions at elevated temperatures. ... 

Reduction of sulfoxides. Sulfoxides can be reduced to sulfides by P2S5 in methylene chloride at 25°. Yields are in the range 50-100%. The method is not applicable to sulfones. Sulfilimines can also be reduced in this way to sulfides. ... 

Sulfoxides. Sulfoxides such as DMSO have long been used as oxidizing agents. Release of the oxygen affords the offensively malodorous sulfide. A polymer-bound sulfide has been formed by the... 

This chapter does not consider the Andersen method this is discussed by Allin in Chapter 2. Attention is focused on the asymmetric oxidation of sulfides to sulfoxides ( sulfoxidation ). Cases in which the chiral auxiliary is connected to the sulfide are detailed first, then stoichiometric and, finally, catalytic oxidations are discussed. 

Reduction of Sulfoxides. Sulfoxides are reduced to the corresponding sulfides by TUD in the presence of iodine for example, dibutyl sulfoxide gives dibutyl sulfide (89%) and diphenyl sulfoxide gives diphenyl sulfide (95%). The reaction is generally carried out by adding sulfoxides and iodine to a suspension of TUD in acetonitrile and then refluxing the mixture for a short time. 

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