Abstract
Twenty-four mono-Mannich bases of the general formulae 4'-chloro-3-[7″-chloro(and trifluoro-methyl)quinolin-4'-yl]amino-5-(substituted amino)methylbiphenyl-4-ols and 4'-bromo(and 3'- trifluoromethyl-3(substituted amino)methyl-5(7″-trifluoromethylquinolin-4″-yl) aminobiphenyl-2-ols have been prepared by condensation of the 4-chloro heterocycle with 5-amino-3-(N-substituted amino)methyl-4'-chlorobiphenyl-4-ols or 5-amino-3-(N-substituted amino)methyl- 4'-bromo(or 3'-trifluoromethyl)biphenyl-2-ols. The antimalarial activity of these products in in vitro tests against Plasmodium falciparum reveals many with IC50 values of 50-100 nM ( chloroquine 20-40 nM ). The biphenyl-2-ols were more active than comparable biphenyl-4-ols.
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