Herein we describe the design, multicomponent synthesis, and biological, molecular modeling and ADMET studies, as well as in vitro PAMPA-blood-brain barrier (BBB) analysis of new tacrine-ferulic acid hybrids (TFAHs). We identified (E)-3-(hydroxy-3-methoxyphenyl)-N-{8[(7-methoxy-1,2,3,4-tetrahydroacridin-9-yl)amino]octyl}-N-[2-(naphthalen-2-ylamino)2-oxoethyl]acrylamide (TFAH 10 n) as a particularly interesting multipotent compound that shows moderate and completely selective inhibition of human butyrylcholinesterase (IC50 =68.2 nM), strong antioxidant activity (4.29 equiv trolox in an oxygen radical absorbance capacity (ORAC) assay), and good β-amyloid (Aβ) anti-aggregation properties (65.6 % at 1:1 ratio); moreover, it is able to permeate central nervous system (CNS) tissues, as determined by PAMPA-BBB assay. Notably, even when tested at very high concentrations, TFAH 10 n easily surpasses the other TFAHs in hepatotoxicity profiling (59.4 % cell viability at 1000 μM), affording good neuroprotection against toxic insults such as Aβ1-40 , Aβ1-42 , H2 O2 , and oligomycin A/rotenone on SH-SY5Y cells, at 1 μM. The results reported herein support the development of new multipotent TFAH derivatives as potential drugs for the treatment of Alzheimer's disease.

A convenient synthesis of pyrido[2,1-f]purine-2,4-diones is described by reaction of 6-aminouracil derivatives with Nbromosuccinimide (NBS) followed by in situ reaction with pyridine or 4-substituted pyridines. A detailed study of the reaction conditions has been performed and a mechanism involving a 5,5-dibromo derivative is proposed.

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