Reasonable synthesis of alpha-L-homoproline and some derivatives. Preparation of 7-alpha-L-homoproline-bradykinin]

Optically pure α-L -homoproline can be prepared with good yield from N-bnezyloxycarbonyl-L -proline through its diazoketone-derivative. Preparation of derivatives of α-L -homoproline used in peptide chemistry, and of 7-α-L -homoproline-bradykinin, as well as biological investigation of the latter are described.