Piperazine-based CCR5 antagonists as HIV-1 inhibitors. II. Discovery of 1-[(2,4-dimethyl-3-pyridinyl)carbonyl]-4-methyl-4-[3(S)-methyl-4-[1(S)-[4-(trifluoro-methyl)phenyl]ethyl]-1-piperazinyl]-piperidine N1-oxide (Sch-350634), an orally bioavailable, potent CCR5 antagonist
Jr. Tagat et al., Piperazine-based CCR5 antagonists as HIV-1 inhibitors. II. Discovery of 1-[(2,4-dimethyl-3-pyridinyl)carbonyl]-4-methyl-4-[3(S)-methyl-4-[1(S)-[4-(trifluoro-methyl)phenyl]ethyl]-1-piperazinyl]-piperidine N1-oxide (Sch-350634), an orally bioavailable, potent CCR5 antagonist, J MED CHEM, 44(21), 2001, pp. 3343-3346
Truncation of the original piperidino-2(S)-methyl piperazine lead structure
2, from a family of muscarinic antagonists, gave compound 8 which has impr
oved selectivity for the HIV-1 co-receptor CCR5 over muscarinic receptors.
Further optimization for pharmacokinetic properties afforded Sch-350634 (1)
, a prototypical piperazine-based CCR5 antagonist, which is a potent inhibi
tor of HIV-1 entry and replication in PBMCs. The title compound (1) has exc
ellent oral bioavailability in rat, dog, and monkey.