US9408840 — Compounds and methods for inhibiting NHE-mediated antiport in the treatment of disorders associated with fluid retention or salt overload and gastrointestinal tract disorder

USPTO Abstract

The present disclosure is directed to compounds of the structure (X): Core L-NHE) n   (X) wherein: n is 2 or 3; NHE has the structure wherein: R 1 is H or —SO 2 —NR 7 R 8 —; R 2 is selected from H, —NR 7 (CO)R 8 , —SO 2 —NR 7 R 8 — and —NR 7 R 8 ; R 3 is hydrogen; R 7 is hydrogen; R 8 is a bond linking to L; L is a polyalkylene glycol linker; and Core has the following structure: wherein: X is selected from the group consisting of a bond, —O—, —NH—, NHC(═O)—, —NHC(═O)NH— and —NHSO 2 —; and Y is selected from the group consisting of a bond, optionally substituted C 1-6 alkylene, optionally substituted benzene, pyridinyl, a polyethylene glycol linker and —(CH 2 ) 1-6 O(CH 2 ) 1-6 —, and methods of using such compounds for the treatment of irritable bowel syndrome, chronic kidney disease and end-stage renal disease.