Inhibitors of HIV-1 attachment. Part 11: The discovery and structure–activity relationships associated with 4,6-diazaindole cores
2013
Bender, John A. | Yang, Zhong | Eggers, Betsy | Gong, Yi-Fei | Lin, Pin-Fang | Parker, Dawn D. | Rahematpura, Sandhya | Zheng, Ming | Meanwell, Nicholas A. | Kadow, John F.
A series of HIV-1 attachment inhibitors containing a 4,6-diazaindole core were examined in an effort to identify a compound which improved upon the potency and oral exposure of BMS-488043 (2). BMS-488043 (2) is a 6-azaindole-based HIV-1 attachment inhibitor which established proof-of-concept for this mechanism in human clinical studies but required high doses and concomitant administration of a high fat meal to achieve efficacious exposures. Based on previous studies in indole and azaindole scaffolds, SAR investigation was concentrated around the key 7-position in the 4,6-diazaindole series and led to the discovery of molecules with 5- to 20-fold increases in potency and three- to seven-fold increases in exposure over 2 in a rat PK studies.
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