From Thione S-Imides Type D

From Thione S-Imides (Type D). Further details of the cycloadditions between activated alkenes and thione S-imides (see Vol. 1, p. 112, ref 16) have been reported.  

From O-Aryl-oximes and Alkanethiols (TypeF ). 4-Amino-isothiazoles (2 X = NH2) are obtained from the reaction between ArON=CR CN and R CH2SH, via the intermediates R CH2SN=CR CN, and these have subsequently been converted into various bicyclic isothiazoles (see later). 

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From Thione-S-imides (Type D).— The first synthesis of compounds incorporating the thione-S-imide (RiC S NR ) system has been announced, and some of their novel reactions have been enumerated. Amongst them, the cycloaddition of N-isobutenylpyrrolidine (20) to (19) yields a 1 1 adduct, formulated as the isothiazolidine (21). ... 

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