3 research outputs found
Rapid Development of Piperidine Carboxamides as Potent and Selective Anaplastic Lymphoma Kinase Inhibitors
Piperidine carboxamide <b>1</b> was identified
as a novel
inhibitor of anaplastic lymphoma kinase (ALK enzyme assay IC<sub>50</sub> = 0.174 μM) during high throughput screening, with selectivity
over the related kinase insulin-like growth factor-1 (IGF1R). The
X-ray cocrystal structure of <b>1</b> with the ALK kinase domain
revealed an unusual DFG-shifted conformation, allowing access to an
extended hydrophobic pocket. Structure–activity relationship
(SAR) studies were focused on the rapid parallel optimization of both
the right- and left-hand side of the molecule, culminating in molecules
with improved potency and selectivity over IGF1R
The Discovery and Optimization of a Novel Class of Potent, Selective, and Orally Bioavailable Anaplastic Lymphoma Kinase (ALK) Inhibitors with Potential Utility for the Treatment of Cancer
A class of 2-acyliminobenzimidazoles has been developed
as potent and selective inhibitors of anaplastic lymphoma kinase (ALK).
Structure based design facilitated the rapid development of structure–activity
relationships (SAR) and the optimization of kinase selectivity. Introduction
of an optimally placed polar substituent was key to solving issues
of metabolic stability and led to the development of potent, selective,
orally bioavailable ALK inhibitors. Compound <b>49</b> achieved
substantial tumor regression in an NPM-ALK driven murine tumor xenograft
model when dosed qd. Compounds <b>36</b> and <b>49</b> show favorable potency and PK characteristics in preclinical species
indicative of suitability for further development
The Discovery and Hit-to-Lead Optimization of Tricyclic Sulfonamides as Potent and Efficacious Potentiators of Glycine Receptors
Current pain therapeutics suffer
from undesirable psychotropic
and sedative side effects, as well as abuse potential. Glycine receptors
(GlyRs) are inhibitory ligand-gated ion channels expressed in nerves
of the spinal dorsal horn, where their activation is believed to reduce
transmission of painful stimuli. Herein, we describe the identification
and hit-to-lead optimization of a novel class of tricyclic sulfonamides
as allosteric GlyR potentiators. Initial optimization of high-throughput
screening (HTS) hit <b>1</b> led to the identification of <b>3</b>, which demonstrated ex vivo potentiation of glycine-activated
current in mouse dorsal horn neurons from spinal cord slices. Further
improvement of potency and pharmacokinetics produced in vivo proof-of-concept
tool molecule <b>20</b> (AM-1488), which reversed tactile allodynia
in a mouse spared-nerve injury (SNI) model. Additional structural
optimization provided highly potent potentiator <b>32</b> (AM-3607),
which was cocrystallized with human GlyRα3<sub>cryst</sub> to
afford the first described potentiator-bound X-ray cocrystal structure
within this class of ligand-gated ion channels (LGICs)