Synthese von 9-Fluorenalkanaminen, 1. Mitt. 2-(9H-Fluoren-9-yl)-2-propanamin und seine kernsubstituierten Derivate

Synthesis of 9-Fluorenealkanamines, I: 2-(9H-Fluoren-9-yl)-2-propanamine and Its Aryl Substituted Derivatives The diphenylamino alcohol 1 reacts with phosphoric acid to yield the fluorene 2 . Whereas 1b cyclises to yield 2b only, 3,3-disubstituted derivatives of 1 should be capable of producing 6, 7 and 8 . In fact, however, only 6 or 7 are formed depending on the nature of the substituents. Compound 3 reacts to yield the fluorene 4 . Ring opening leads to 5 .