Bafrekalant is a diazabicyclo-substituted imidazo[1,2-a]pyrimidine analogue. Bafrekalant may be used for studying breathing disorders such as sleep-related breathing disorders such as obstructive and central sleep apnea and snoring (information disclosed in patent WO2018228907A1).

Physicochemical Properties

Molecular Formula	C29H31CLN6O2
Molecular Weight	531.05
Exact Mass	530.219
CAS #	2256770-44-0
PubChem CID	146462757
Appearance	White to off-white solid powder
LogP	5.5
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	6
Rotatable Bond Count	6
Heavy Atom Count	38
Complexity	811
Defined Atom Stereocenter Count	0
InChi Key	VDKJCAWGDJJKNL-UHFFFAOYSA-N
InChi Code	InChI=1S/C29H31ClN6O2/c1-18(2)19-5-7-20(8-6-19)26-24(35-14-4-13-31-29(35)33-26)17-34-15-21-9-10-22(16-34)36(21)28(37)27-23(30)11-12-25(32-27)38-3/h4-8,11-14,18,21-22H,9-10,15-17H2,1-3H3
Chemical Name	(3-chloro-6-methoxypyridin-2-yl)-[3-[[2-(4-propan-2-ylphenyl)imidazo[1,2-a]pyrimidin-3-yl]methyl]-3,8-diazabicyclo[3.2.1]octan-8-yl]methanone
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)

Biological Activity

References

[1]. Diazabicyclic substituted imidazopyrimidines and their use for the treatment of breathing disorders. Patent WO2018228907A1.

Solubility Data

Solubility (In Vitro)

DMSO: 250 mg/mL (470.77 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.08 mg/mL (3.92 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 20.8 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: ≥ 2.08 mg/mL (3.92 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 20.8 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. Solubility in Formulation 3: ≥ 2.08 mg/mL (3.92 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 20.8 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	1.8831 mL	9.4153 mL	18.8306 mL
	5 mM	0.3766 mL	1.8831 mL	3.7661 mL
	10 mM	0.1883 mL	0.9415 mL	1.8831 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.