Abstract

Tetracyclic nitrogen bridgehead compounds, dibenzodiazecines and tricyclic quinazolinimines, in which the size of the alicyclic ring system and the length of the alkyl chain between the quinazolinimine moiety and a phenyl ring connected to the imine nitrogen atom were changed systematically, were synthesized and their ability to inhibit acetyl- and butyrylcholinesterase (AChE/BChE), respectively, was evaluated. Moderate and strong inhibitors of BChE—compared to galanthamine and rivastigmine—were identified, which show mixed affinities or are moderately or highly selective towards BChE, respectively.

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