Aminocyclopentadienes, Aminoferrocenes, and Aminocobaltocenes

摘要

More than forty years after the discovery of ferrocene, examples of aminocyclopentadienes and aminoferrocenes are still scarce. Even what is probably the best synthesis (four steps starting from ferrocene) of the parent compound aminoferrocene FcNH_2to date affords only small amounts; alternate synthetic routes are equally demanding. Several N,N'-dialkylaminofer-rocenes can. according to a paper by Boche et al., be prepared from O-tosylated N,N'-dialktkhydroxylamines in good yields; however, the number of hydroxyl derivatives is limited and. in addition, the handling of these compounds poses certain risks. which severely limits the possible applications of this reaction.