PMID: 16480874
Holsworth DD, Cai C, Cheng XM, Cody WL, Downing DM, Erasga N, Lee C, Powell NA, Edmunds JJ, Stier M, Jalaie M, Zhang E, McConnell P, Ryan MJ, Bryant J, Li T, Kasani A, Hall E, Subedi R, Rahim M, Maiti S
Ketopiperazine-based renin inhibitors: optimization of the "C" ring.
Bioorg Med Chem Lett. 2006 May 1;16(9):2500-4. Epub 2006 Feb 15.
A systematic investigation of the S3 sub-pocket activity requirements was conducted. It was observed that linear and sterically small side chain substituents are preferred in the S3 sub-pocket for optimal renin inhibition. Polar groups in the S3-sub-pocket were not well tolerated and caused a reduction in renin inhibitory activity. Further, compounds with clog P's < or = 3 demonstrated a dramatic reduction in CYP3A4 inhibitory activity.