Thietane 1,1-dioxides properties

Cycloaddition of sulfenes to a,)8-unsaturated sulfides that contain electron-donor substituents, such as alkyl and arylthio groups, has proved to be a valuable synthetic pathway for the production of thietane 1,1-dioxides. Methylsulfonylsulfene (84) is more reactive than the regular sulfenes because of the activating effect by the strong electron-acceptor properties of the sulfonyl group. If, in addition, a strong electron-donor group, such as the alkylamino function, is provided by the unsaturated sulfide molecule, the cycloaddition proceeds much more readily. 

Physical Properties.—A -Ray analysis of c -2,2-diphenyl-3,4-dichlorothietan 1,1-dioxide indicates that the thietan ring is puckered, and that the 3-chlorine... 

Physical Properties.—Structure determinations by X-ray analysis of 2,2-dimethylthietan 1,1-dioxide and of 3-chlorothietan and 3-hydroxythietan l,l-dioxides have been accomplished. The vibrational frequencies of the sulphone group in thietan 1,1-dioxide and a number of other sulphones have been compared with hydrogen-bonding ability, calculated ir charge densities and S—O bond orders. " The signs of the proton coupling c[Pg.121]

Formatira and Chemical Properties.— The structure of one of the adducts obtained from azibenzil and sulphur dioxide has been determined to be an oxathiin instead of the thietan-3-(me 1,1-dioxide proposed earlier. Derivatives of 3-aminothietan 1,1-dioxide have been obtained by additicm of... 

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