N-Protected derivatives 12, 13 and 17 of 1a,5a,6b-6amino-3-azabicyclo[3.1.0]hexane 5 were synthesized via chloroenamines 6a or 6b. The specific N-protection was realized either by using a chloroenamine 6b with different protecting groups or by selective removal of identical protecting groups at the bicyclic target molecule 7. Dibenzylamino compound 13 allowed the preparation of naphthyridine derivative 25 which represents the 6bdiastereomer of trovafloxacin mesylate, a potent Gyrase inhibitor.

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