Short and efficient syntheses of analogues of WAY-100635: new and potent 5-HT1A receptor antagonists.
2001
Abstract Simple syntheses of four new and potent analogues of the 5-HT 1A receptor ligand, WAY-100635 are described, namely the 6-(pyridinyl)-bromo-, the 6-(pyridinyl)-fluoro-, the pyrimidine- and the 5-(pyridinyl)-bromo-analogues. The first three analogues were obtained by aromatic nucleophilic substitution of the 2,6-dihalogenopyridine (activated or not as an N -oxide) or of the 2-chloropyrimidine with the corresponding amine nucleophile as a key step. The fourth analogue, the 5-(pyridinyl)-bromo-analogue, was synthesized from the 2-amino-5-bromopyridine via a progressive elongation of the skeleton. The four compounds described are all full antagonists and show good in vitro binding affinities ( K i ).
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