Arenesulfonyl thiocyanates

In the same manner as described before, arenesulfonyl thiocyanates are able to show self-addition to conjugated systems yielding sulfones243,244. More important, however, is that reactions of selenosulfonates with unsaturated systems as well as with nucleophilic carbon have been proved. 

The same isocyanoamides 100 gave an interesting ring-closure reaction with arenesulfonyl thiocyanates to afford spirothioimidohydantoins 102 (Scheme 2.36)... 

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