Sulphide-sulphonate

Further data from the polarography and cyclic voltammetry in dimethylformamide are given in Table 5.1 for a series of overall two-electron processes leading to cleavage of a benzyl-heteroatom bond. The first electron transfer step is of the dissociative electron transfer type leading to a benzyl radical. This radical is reduced firrther, at the working potential, to the benzyl carbanion. The carbanion fi om benzyl chlorides, esters, ethers, sulphides, sulphones and quaternary ammonium salts can be trapped by carbon dioxide to form phenylacetic acid [2]. Reac-... 

RT 1° alcohol—) aldehyde 2° alcohol—) ketone diol-) lactone Cleaves 1,2-diols Sulphides—) sulphones... 

Sodium bromide Sodium chloride Sodium sulphide Sulphonated asphalts... 

Electron Diffraction.—Among completed electron-diffraction studies are ethyl methyl sulphide, chloromethyl methyl sulphide, methyl phenyl sulphide, di-(2-pyridyl) sulphide, sulphones, sulphoxides and sulphones, and trifluoro-methanesulphonyl chloride. A number of precise analyses of gas-phase conformational equilibria have emerged. Methyl ethyl sulphide shows a preference for the gauche conformation rather than for the trans form. ... 

Several methods for the reduction of allylic functional groups have been reported. Although some of these are derivative of earlier procedures, useful improvements and modifications are noteworthy. For example, combination of [Pd(PhaP)4] with lithium triethylborohydride provides an effective system for the reductive removal of allylic ethers, sulphides, sulphones, selenides, and t-butyl-dimethylsilyl ethers. Many of these functional groups, of course, are not readily removed by other methods. Furthermore, this combination gives good to excellent maintenance of the regio- and stereo-integrity of the allylic double bonds. In a similar fashion, 2-tosyl homoallyl alcohols can be easily desulphonylated to... 

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