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BI-3406 (SOS1-IN-2)

Alias: BI3406; BI-3406; BI 3406; SOS1-IN2BI-3406; SOS1-IN-2BI 3406
Cat No.:V31508 Purity: ≥98%
BI-3406 (BI3406; SOS1-IN-2) is a novel, orally bioactive, and selective inhibitor of Son of Sevenless 1 (SOS1) with anticancer activity.
BI-3406 (SOS1-IN-2)
BI-3406 (SOS1-IN-2) Chemical Structure CAS No.: 2230836-55-0
Product category: Ras
This product is for research use only, not for human use. We do not sell to patients.
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Product Description
BI-3406 (BI3406; SOS1-IN-2) is a novel, orally bioactive, and selective inhibitor of Son of Sevenless 1 (SOS1) with anticancer activity. It selectively binds to SOS1 and blocks KRAS and SOS1 interaction with an IC50 of 6 nM. BI-3406 is capable of lowering the production of GTP-bound KRAS, which blocks the signaling of the MAPK pathway.
BI-3406 (CAS 2230836-55-0), also known as SOS1-IN-2, is a potent, selective, and orally active inhibitor of the interaction between KRAS and Son of Sevenless 1 (SOS1). It has an IC50 of 5-6 nM. It has the molecular formula C₂₃H₂₅F₃N₄O₃ and a molecular weight of 462.46. Its IUPAC name is N-((R)-1-(3-amino-5-(trifluoromethyl)phenyl)ethyl)-7-methoxy-2-methyl-6-(((S)-tetrahydrofuran-3-yl)oxy)quinazolin-4-amine.
Biological Activity I Assay Protocols (From Reference)
Targets
KRAS-SOS1 ( IC50 = 6 nM )
The primary target of BI-3406 is SOS1, a guanine nucleotide exchange factor (GEF) that activates KRAS. By binding to SOS1, BI-3406 blocks its interaction with KRAS, preventing the exchange of GDP for GTP on KRAS. This reduces the levels of GTP-loaded KRAS and inhibits MAPK signaling. It is effective irrespective of the KRAS mutation.
ln Vitro
BI-3406 is a response between KRAS and the guanine-binding factor (GEF) SOS1. BI-3406 does not elicit KRAS and SOS2 responses, but does elicit activity on a broad range of KRAS food variants, including all major G12 and G13 oncoproteins. In KRAS G12 or G13 mutant cells, dehydration of this signaling cascade by BI-3406 effectively limits cell proliferation [2].
In vitro, BI-3406 is a highly potent and selective SOS1::KRAS inhibitor with an IC50 of 5-6 nM. It selectively binds to SOS1 and blocks its interaction with KRAS. It reduces GTP-loaded KRAS formation and inhibits MAPK signaling. It shows anticancer activity. Its activity makes it a valuable tool for studying KRAS-driven cancers.
ln Vivo
In vivo, BI-3406 acts synergistically with the KRAS inhibitor adagrasib in KRAS G12C mutant lung and colorectal cancer models. It is orally active and has antitumor activity. Its ability to inhibit SOS1::KRAS interaction offers a new approach for treating KRAS-driven tumors. Further studies are needed to fully characterize its in vivo efficacy and safety.
Enzyme Assay
For SOS1::KRAS interaction assays, the binding between SOS1 and KRAS is measured using techniques like AlphaScreen or surface plasmon resonance. The compounds is incubated with the proteins, and the extent of interaction is measured. IC50 values are calculated. For cellular assays, the effect on downstream signaling (e.g., ERK phosphorylation) and cell proliferation is assessed.
Cell Assay
For cellular studies, KRAS-mutant cancer cells are cultured in appropriate medium. BI-3406 is dissolved in DMSO and diluted in culture medium. Cells are treated with the compound. Cell viability is assessed by MTT or CellTiter-Glo assays. KRAS-GTP levels are measured by pull-down assays. ERK and AKT phosphorylation are analyzed by Western blot.
Animal Protocol
For in vivo efficacy studies, immunodeficient mice are implanted with KRAS-mutant cancer cells. BI-3406 is formulated in vehicle and administered orally. Tumor growth is monitored. At study termination, tumors are excised and processed for analysis of KRAS-GTP levels, ERK phosphorylation, and proliferation markers. Pharmacokinetic studies would assess compound levels in plasma and tissues.
ADME/Pharmacokinetics
Pharmacokinetic data for BI-3406 indicate that it is orally active. It has good oral bioavailability and a favorable PK profile. Its half-life, Cmax, and AUC would be determined in dedicated PK studies. The compound's pharmacokinetic properties support its use in in vivo efficacy studies.
Toxicity/Toxicokinetics
Toxicological data for BI-3406 are limited, as it is a research compound. In preclinical studies, it has been shown to be well-tolerated at pharmacologically active doses. No acute toxicity, organ-specific toxicity, or mutagenicity data have been reported. As with all research compounds, appropriate safety precautions should be taken during handling.
References

[1]. Novel benzylamino substituted quinazolines and derivatives as sos1 inhibitors. WO2018115380A1.

[2]. Abstract PL06-01: Discovery of BI-3406: A potent and selective SOS1::KRAS inhibitor opens a new approach for treating KRAS-driven tumors. December 2019.

Additional Infomation
BI-3406 (CAS 2230836-55-0) is a potent, selective, and orally active SOS1::KRAS inhibitor with an IC50 of 5-6 nM. It reduces GTP-loaded KRAS and inhibits MAPK signaling. It acts synergistically with adagrasib. Its molecular formula is C₂₃H₂₅F₃N₄O₃, and its molecular weight is 462.46. It is strictly for research use.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C23H25F3N4O3
Molecular Weight
462.4648
Exact Mass
462.19
Elemental Analysis
C, 59.73; H, 5.45; F, 12.32; N, 12.11; O, 10.38
CAS #
2230836-55-0
PubChem CID
138911318
Appearance
White to off-white solid powder
LogP
4.3
Hydrogen Bond Donor Count
2
Hydrogen Bond Acceptor Count
10
Rotatable Bond Count
6
Heavy Atom Count
33
Complexity
643
Defined Atom Stereocenter Count
2
SMILES
CC1=NC2=CC(=C(C=C2C(=N1)N[C@H](C)C3=CC(=CC(=C3)N)C(F)(F)F)O[C@H]4CCOC4)OC
InChi Key
XVFDNRYZXDHTHT-PXAZEXFGSA-N
InChi Code
InChI=1S/C23H25F3N4O3/c1-12(14-6-15(23(24,25)26)8-16(27)7-14)28-22-18-9-21(33-17-4-5-32-11-17)20(31-3)10-19(18)29-13(2)30-22/h6-10,12,17H,4-5,11,27H2,1-3H3,(H,28,29,30)/t12-,17+/m1/s1
Chemical Name
N-[(1R)-1-[3-amino-5-(trifluoromethyl)phenyl]ethyl]-7-methoxy-2-methyl-6-[(3S)-oxolan-3-yl]oxyquinazolin-4-amine
Synonyms
BI3406; BI-3406; BI 3406; SOS1-IN2BI-3406; SOS1-IN-2BI 3406
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

Note: Please store this product in a sealed and protected environment (e.g. under nitrogen), avoid exposure to moisture.
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)
Ethanol: ~100 mg/mL (~216.2 mM)
DMSO: 92~100 mg/mL (198.9~216.2 mM)
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 2.5 mg/mL (5.41 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 (5.41 mM) 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; with ultrasonication.
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 (5.41 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.


Solubility in Formulation 4: ≥ 2.5 mg/mL (5.41 mM) (saturation unknown) in 10% EtOH + 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 EtOH stock solution to 400 μL of PEG300 and mix evenly; then add 50 μL of Tween-80 to the above solution and mix evenly; then add 450 μL of 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 5: ≥ 2.5 mg/mL (5.41 mM) (saturation unknown) in 10% EtOH + 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 EtOH 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 6: ≥ 2.5 mg/mL (5.41 mM) (saturation unknown) in 10% EtOH + 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 EtOH stock solution to 900 μL of corn oil and mix evenly.

Solubility in Formulation 7: 5%DMSO + Corn oil: 5.0mg/ml (10.81mM)

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 2.1623 mL 10.8117 mL 21.6235 mL
5 mM 0.4325 mL 2.1623 mL 4.3247 mL
10 mM 0.2162 mL 1.0812 mL 2.1623 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)
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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.

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