MK-6096 (Filorexant)

Alias: MK-6096; MK6096; MK 6096
Cat No.:V3447 Purity: ≥98%
Filorexant (formerly known as MK-6096) is a novel, orally bioavailable, potent and selective reversible antagonist of OX(1)R and OX(2)R currently in clinical development for insomnia.
MK-6096 (Filorexant) Chemical Structure CAS No.: 1088991-73-4
Product category: OX Receptor
This product is for research use only, not for human use. We do not sell to patients.
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Purity & Quality Control Documentation

Purity: ≥98%

Product Description

Filorexant (formerly known as MK-6096) is a novel, orally bioavailable, potent and selective reversible antagonist of OX(1)R and OX(2)R currently in clinical development for insomnia. In radioligand binding and functional cell based assays, MK-6096 demonstrated potent binding and antagonism of both human OX(1)R and OX(2)R. MK-6096 significantly increased sleep in dogs (0.25 and 0.5 mg/kg) and rats (3-30 mg/kg) and occupies 90% of human OX(2)Rs expressed in transgenic rats at a plasma concentration of 142 nM. It also significantly reduced locomotor activity. MK-6096 is a new and targeted medication for the management of sleeplessness.

Biological Activity I Assay Protocols (From Reference)
Targets
Orexin receptor ( Ki < 3 nM )
ln Vitro
Filorexant (MK-6096) exhibited strong binding and antagonistic effects on human OX(1)R and OX(2)R in radioligand binding and functional cell-based assays (<3 nM for binding and 11 nM for FLIPR), without causing any notable side effects on a panel of more than 170 receptors and enzymes. Filorexant (MK-6096) occupies 90% of human OX(2)Rs expressed in transgenic rats at a plasma concentration of 142 nM.
ln Vivo
Filorexant (MK-6096) significantly increased sleep and decreased locomotor activity in a dose-dependent manner in rats (3-30 mg/kg) and dogs (0.25 and 0.5 mg/kg).
Animal Protocol
The male Sprague Dawley rats (n = 8/study; age: 3-6 months; weight: 450-600 g) were kept in separate housing, given free access to food and water, and kept in a 12 h light/12 h dark cycle, with lights coming on at 4:00 and going off at 16:00. Utilizing a counterbalanced crossover design, sleep studies were performed to assess Filorexant (3 and 10 mg/kg, p.o.), DORA-22 (10 mg/kg, p.o.), and almorexant (3 and 30 mg/kg, p.o.). For DORA-22 and Filorexant, respectively, all animals were alternately treated with drug and vehicle daily for either 3 or 7 consecutive days: 2 baseline days (no dosing), a 2 day vehicle-only run-in, a 3 or 7-day arm of drug or vehicle, and a 3 or 7-day conditional crossover. The effects of compound treatments were assessed after administration in the active phase in comparison to the vehicle (20% Vitamin E TPGS, p.o.).
References

[1]. Pharmacological characterization of MK-6096 - a dual orexin receptor antagonist for insomnia. Neuropharmacology. 2012 Feb;62(2):978-87.

[2]. Discovery of [(2R,5R)-5-{[(5-fluoropyridin-2-yl)oxy]methyl}-2-methylpiperidin-1-yl][5-methyl-2-(pyrimidin-2-yl)phenyl]methanone (MK-6096): a dual orexin receptor antagonist with potent sleep-promoting properties. ChemMedChem. 2012 Mar 5;7(3):415-24, 337.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C24H25FN4O2
Molecular Weight
420.49
Exact Mass
420.2
Elemental Analysis
C, 68.55; H, 5.99; F, 4.52; N, 13.32; O, 7.61
CAS #
1088991-73-4
Related CAS #
1088991-73-4
Appearance
Solid powder
SMILES
C[C@@H]1CC[C@H](CN1C(=O)C2=C(C=CC(=C2)C)C3=NC=CC=N3)COC4=NC=C(C=C4)F
InChi Key
NPFDWHQSDBWQLH-QZTJIDSGSA-N
InChi Code
InChI=1S/C24H25FN4O2/c1-16-4-8-20(23-26-10-3-11-27-23)21(12-16)24(30)29-14-18(6-5-17(29)2)15-31-22-9-7-19(25)13-28-22/h3-4,7-13,17-18H,5-6,14-15H2,1-2H3/t17-,18-/m1/s1
Chemical Name
[(2R,5R)-5-[(5-fluoropyridin-2-yl)oxymethyl]-2-methylpiperidin-1-yl]-(5-methyl-2-pyrimidin-2-ylphenyl)methanone
Synonyms
MK-6096; MK6096; MK 6096
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
DMSO: ~100 mg/mL (~237.8 mM)
Water: N/A
Ethanol: N/A
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 2.5 mg/mL (5.95 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

Solubility in Formulation 2: ≥ 2.5 mg/mL (5.95 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.

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Solubility in Formulation 3: ≥ 2.5 mg/mL (5.95 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.


 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 2.3782 mL 11.8909 mL 23.7818 mL
5 mM 0.4756 mL 2.3782 mL 4.7564 mL
10 mM 0.2378 mL 1.1891 mL 2.3782 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

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In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

Clinical Trial Information
NCT Number Recruitment interventions Conditions Sponsor/Collaborators Start Date Phases
NCT01564459 Completed Drug: MK-6096
Drug: Placebo
Diabetic Neuropathy, Painful Merck Sharp & Dohme LLC March 26, 2012 Phase 2
NCT01513291 Completed Drug: MK-6096
Drug: Placebo
Migraine
Headache
Merck Sharp & Dohme LLC February 6, 2012 Phase 2
NCT02549027 Completed Drug: MK-1064
Drug: MK-6096
Drug: Placebo
Polysomnography Merck Sharp & Dohme LLC November 6, 2009 Phase 1
NCT01021852 Completed Drug: MK-6096
Drug: Dose-matched Placebo
to MK-6096
Primary Insomnia Merck Sharp & Dohme LLC November 30, 2009 Phase 2
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