Non-steroidal aromatase inhibitors based on a biphenyl scaffold: synthesis, in vitro SAR, and molecular modelling.
The synthesis and in vitro biological evaluation (JEG-3 cells) of a series of novel and potent aromatase inhibitors, prepared by microwave-enhanced Suzuki cross-coupling methodology, are reported. These compounds possess a biphenyl template incorporated with the haem-ligating triazolylmethyl moiety, either on its own or in combination with other substituent(s) at various positions on the phenyl rings. The most potent aromatase inhibitor reported herein has an IC(50) value of 0.12 nM, although seven of its congeners are also highly potent (IC(50)<or=0.5 nM). They all bear the (5-triazolylmethyl-2-cyano)biphenyl structural motif. Docking of representative compounds into a homology model of human aromatase assists in the rationalisation of the SAR derived from the in vitro biological results and supports a crucial role for a cyano group on the "A" phenyl ring, which is accessible to hydrogen bond interactions with Ser 478. Further development of these compounds as potential therapeutic agents for the treatment of hormone-dependent breast cancer is warranted given the high level of potency observed for this class of aromatase inhibitor in vitro.
Jackson
Toby
T
Medicinal Chemistry, Department of Pharmacy and Pharmacology, and Sterix Ltd. University of Bath, Claverton Down, UK.
Woo
L W Lawrence
LW
Trusselle
Melanie N
MN
Purohit
Atul
A
Reed
Michael J
MJ
Potter
Barry V L
BV
D047072:Aromatase Inhibitors / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D001713:Biphenyl Compounds / Q000737:chemistry*; D002478:Cells, Cultured; D006801:Humans; D008958:Models, Molecular; D013329:Structure-Activity Relationship
D047072:Aromatase Inhibitors; D001713:Biphenyl Compounds; C010574:biphenyl