PMID: 28687203

Authors:

Corte JR, Yang W, Fang T, Wang Y, Osuna H, Lai A, Ewing WR, Rossi KA, Myers JE Jr, Sheriff S, Lou Z, Zheng JJ, Harper TW, Bozarth JM, Wu Y, Luettgen JM, Seiffert DA, Quan ML, Wexler RR, Lam PYS

Title:

Macrocyclic inhibitors of Factor XIa: Discovery of alkyl-substituted macrocyclic amide linkers with improved potency.

Journal:

Bioorg Med Chem Lett. 2017 Aug 15;27(16):3833-3839. doi:, 10.1016/j.bmcl.2017.06.058. Epub 2017 Jun 23.

Abstract:

Optimization of macrocyclic inhibitors of FXIa is described which focused on modifications to both the macrocyclic linker and the P1 group. Increases in potency were discovered through interactions with a key hydrophobic region near the S1 prime pocket by substitution of the macrocyclic linker with small alkyl groups. Both the position of substitution and the absolute stereochemistry of the alkyl groups on the macrocyclic linker which led to improved potency varied depending on the ring size of the macrocycle. Replacement of the chlorophenyltetrazole cinnamide P1 in these optimized macrocycles reduced the polar surface area and improved the oral bioavailability for the series, albeit at the cost of a decrease in potency.