8-8 from 1 led to an increase of interest in cycloelimination reactions of aminocyclopropane derivatives (Scheme I). So far alkene generation from aminocyclopropanes has required a primary amino f~ nction, l-~ which was shown to be oxidized in the initial step. We have found a non oxidatively induced cycloelimination of an aminocyclopropane derivative by flash vacuum pyrolysis of diaminobicyclo [nl 0] alkanes 2. Thus decomposition of ...