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Addition of fluorene to N-arylmethylideneanilines under conditions of phase-transfer catalysis gives N-aryl-N-[9H-fluoren-9-yl(aryl)methyl]amines 3a-e.

As a continuation of our previous studies concerned with the reactivity of benzylidene- and furfurylidenefluorenes in addition reactions, in the present work we have prepared a series of new spiropyrrolidines by reactions of 9-arylmethylenefluorenes I with aryl- (II) and furylazomethines (IV) and some Michael addition products by using diphenylmethyleneazomethines VI and VIII. The structure B was assigned to the furylspiropyrrolidines Va - Vf based on 1H NMR data.

No abstract