3 research outputs found
2-(Pyrrolidin-1-yl)ethyl-3,4-dihydroisoquinolin-1(<i>2H</i>)-one Derivatives as Potent and Selective Histamine-3 Receptor Antagonists
On the basis of the previously reported benzimidazole
1,3′-bipyrrolidine benzamides (<b>1</b>), a new class
of 2-(pyrrolidin-1-yl)Âethyl-3,4-dihydroisoquinolin-1Â(2<i>H</i>)-one derivatives (<b>3</b>–<b>50</b>) were synthesized
and evaluated as potent H<sub>3</sub> receptor antagonists. In particular,
compound <b>39</b> exhibited potent in vitro binding and functional
activities at the H<sub>3</sub> receptor, good selectivities against
other neurotransmitter receptors and ion channels, acceptable pharmacokinetic
properties, and a favorable in vivo profile
Neuroactive Steroids. 1. Positive Allosteric Modulators of the (γ-Aminobutyric Acid)<sub>A</sub> Receptor: Structure–Activity Relationships of Heterocyclic Substitution at C‑21
Neuroactive
steroids (NASs) have been shown to impact central nervous
system (CNS) function through positive allosteric modulation of the
GABA<sub>A</sub> receptor (GABA<sub>A</sub>-R). Herein we report the
effects on the activity and pharmacokinetic properties of a series
of nor-19 pregnanolone analogues bearing a heterocyclic substituent
at C-21. These efforts resulted in the identification of SGE-516,
a balanced synaptic/extrasynaptic GABA<sub>A</sub> receptor modulator,
and SGE-872, a selective extrasynaptic GABA<sub>A</sub> receptor modulator.
Both molecules possess excellent druglike properties, making them
advanced leads for oral delivery of GABA<sub>A</sub> receptor modulators
Neuroactive Steroids. 2. 3α-Hydroxy-3β-methyl-21-(4-cyano‑1<i>H</i>‑pyrazol-1′-yl)-19-nor-5β-pregnan-20-one (SAGE-217): A Clinical Next Generation Neuroactive Steroid Positive Allosteric Modulator of the (γ-Aminobutyric Acid)<sub>A</sub> Receptor
Certain classes of neuroactive steroids
(NASs) are positive allosteric
modulators (PAM) of synaptic and extrasynaptic GABA<sub>A</sub> receptors.
Herein, we report new SAR insights in a series of 5β-nor-19-pregnan-20-one
analogues bearing substituted pyrazoles and triazoles at C-21, culminating
in the discovery of 3α-hydroxy-3β-methyl-21-(4-cyano-1<i>H</i>-pyrazol-1′-yl)-19-nor-5β-pregnan-20-one (SAGE-217, <b>3</b>), a potent GABA<sub>A</sub> receptor modulator at both synaptic
and extrasynaptic receptor subtypes, with excellent oral DMPK properties.
Compound <b>3</b> has completed a phase 1 single ascending dose
(SAD) and multiple ascending dose (MAD) clinical trial and is currently
being studied in parallel phase 2 clinical trials for the treatment
of postpartum depression (PPD), major depressive disorder (MDD), and
essential tremor (ET)