Allenes aminomercuration

Allylic amines are usually obtained from the aminomercuration of allenes (equation 161),204221 while allenes with amino groups in a side chain produce the corresponding heterocycles (equation 162)222... 

The addition of amines to electrophilic alkynes and allenes to give enamines is well known221222. It is possible to prepare the F-isomer in a pure state by a stereospecific addition of an amine to an alkyne (equation 10). Enamines have also been obtained by an aminomercuration-demercuration sequence involving addition of aromatic amines to the substituted carbon of unactivated terminal acetylenes 223-225 (equation 11). 

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