Diaziridine moieties

The following references contain additional examples of this method and corresponding reaction types Synthesis of 3-fluoroethyl-2-cyclopenten-l-ones [35], preparation of functionalized bicyclo[5.3.0]decane systems and conversion of 1,2-divinylcyclopropanes to functionalized cycloheptanes [36] e.g. karaha-naenone [37], ( )-/Thimachalene [38][39]. Metal-catalyzed ring expansions in which cyclopropane (e.g. [40] [41] [42] [43] [44]) or aziridines (e.g. [45] [46]) and diaziridines (e.g. [45]) function as essential moieties are well known reactions. 

The formation of 1,3,5-triphenylpyrazole by peroxy-acid oxidation of the pyrazoline (683) can be considered as a dehydration of the intermediate oxaziridine (684). The elusive thiaziridine moiety (686) has been proposed to account for the formation of benzonitrile and sulphur from photolysis of the mesoionic oxathiazolones (685). Diaziridine intermediates (688) and (690) have been suggested to account for the products in photolysis... 

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