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8-Chloroquinazolin-4-ol

Alias: 8-Chloro-4-quinazolinone
Cat No.:V103018 Purity: ≥98%
8-Chloroquinazolin-4-ol (Compd 18) is an inhibitor of PARP-1 enzyme with IC50 value of 5.65 μM.
8-Chloroquinazolin-4-ol
8-Chloroquinazolin-4-ol Chemical Structure CAS No.: 101494-95-5
Product category: PARP
This product is for research use only, not for human use. We do not sell to patients.
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Product Description
8-Chloroquinazolin-4-ol (Compd 18) is an inhibitor of PARP-1 enzyme with IC50 value of 5.65 μM.
8-Chloroquinazolin-4-ol is a heterocyclic organic compound featuring a quinazoline core with a chlorine substituent at the 8-position and a hydroxyl (or oxo) group at the 4-position. This compound is a derivative of quinazoline, a bicyclic structure consisting of a benzene ring fused to a pyrimidine ring. Quinazolinone derivatives, including 8-Chloroquinazolin-4-ol, serve as versatile building blocks for the synthesis of more complex biologically active molecules, including compounds with potential anticancer, antimicrobial, and anti-inflammatory activities. It is intended for research use only.
Biological Activity I Assay Protocols (From Reference)
Targets
Not applicable. 8-Chloroquinazolin-4-ol is a chemical scaffold and synthetic building block, not a drug with a specific biological target. Quinazolinone derivatives are known to exhibit diverse pharmacological activities, including anticancer (EGFR tyrosine kinase inhibition), antimicrobial, and anti-inflammatory properties. However, this specific derivative is primarily used as a precursor for chemical synthesis rather than as a direct-acting pharmacological agent.
ln Vitro
8-Chloroquinazolin-4-ol is a derivative of quinazolin-4(3H)-one, a heterocyclic scaffold widely used in medicinal chemistry. The biological activity of this scaffold is typically associated with inhibition of various protein kinases, including EGFR (epidermal growth factor receptor) and other tyrosine kinases. However, specific in vitro activity data for 8-Chloroquinazolin-4-ol itself is not provided in the available literature. The 4-oxo group is essential for the kinase inhibitory activity of quinazoline-based compounds.
ln Vivo
No specific in vivo data was found for 8-Chloroquinazolin-4-ol. The compound is a synthetic intermediate and building block. The in vivo activity, if any, would be associated with the final drug molecules synthesized from this scaffold. As a research chemical, it is not intended for in vivo administration; its use is limited to ex vivo chemical synthesis.
Enzyme Assay
Not applicable. 8-Chloroquinazolin-4-ol is a synthetic intermediate, not a test compound in enzyme binding assays. A typical assay for quinazoline-based EGFR inhibitors: The active compound (derived from this scaffold) is tested for kinase inhibition. Recombinant EGFR kinase (0.1-1 ng/well) is incubated with 50 microM ATP and 0.2 mg/mL poly(Glu, Tyr) substrate in kinase buffer. Varying concentrations of the inhibitor (0.001-10,000 nM) are added. Phosphorylation is measured by ELISA using an anti-phosphotyrosine antibody.
Cell Assay
Not applicable. 8-Chloroquinazolin-4-ol is a chemical building block for organic synthesis, not a compound tested directly in cell-based pharmacological assays. It is used as a starting material to synthesize more complex molecules that may have biological activity. For example, a derivative might be tested in cancer cell lines to evaluate its antiproliferative activity against EGFR-overexpressing cells such as A431 or HCC827 cells.
Animal Protocol
Not applicable. 8-Chloroquinazolin-4-ol is a synthetic building block used in medicinal chemistry and organic synthesis. It is not administered to animals as a drug. The compound is intended for chemical reactions such as alkylation, acylation, or nucleophilic substitution to introduce various functional groups. It is a research reagent for the preparation of bioactive quinazolinone derivatives, not a drug candidate.
ADME/Pharmacokinetics
Not applicable. Pharmacokinetic studies are not performed on 8-Chloroquinazolin-4-ol, as it is a synthetic intermediate, not a drug candidate. The ADME properties would be determined for the final drug molecule that is synthesized using this scaffold. This compound is a chemical building block and is not intended for systemic administration.
Toxicity/Toxicokinetics
No toxicity data was found for 8-Chloroquinazolin-4-ol. As a synthetic intermediate, it should be handled with standard chemical safety precautions. The chlorinated quinazoline structure suggests potential for chemical reactivity, and appropriate protective equipment (gloves, goggles, lab coat) should be used when handling this compound. A thorough risk assessment should be performed before use.
References

[1]. Synthesis and SAR optimization of quinazolin-4(3H)-ones as poly(ADP-ribose)polymerase-1 inhibitors. Eur J Med Chem. 2012 Apr:50:264-73.

Additional Infomation
8-Chloroquinazolin-4-ol (also known as 8-chloroquinazolin-4(3H)-one) is a research-grade heterocyclic compound. Its molecular formula is C8H5ClN2O and molecular weight is 180.59. It appears as a solid and is soluble in DMSO and DMF. This product is intended for laboratory research and chemical synthesis applications only, not for human or veterinary use. Store in a cool, dry place, protected from light and moisture.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C8H5CLN2O
Molecular Weight
180.59
Exact Mass
180.009
CAS #
101494-95-5
PubChem CID
135412869
Appearance
Solid powder
Density
1.5±0.1 g/cm3
Boiling Point
359.9±22.0 °C at 760 mmHg
Flash Point
171.5±22.3 °C
Vapour Pressure
0.0±0.8 mmHg at 25°C
Index of Refraction
1.71
LogP
1
Hydrogen Bond Donor Count
1
Hydrogen Bond Acceptor Count
2
Rotatable Bond Count
0
Heavy Atom Count
12
Complexity
229
Defined Atom Stereocenter Count
0
SMILES
ClC1=C2N=CNC(=O)C2=CC=C1
InChi Key
JWLJDRWZFALRKE-UHFFFAOYSA-N
InChi Code
InChI=1S/C8H5ClN2O/c9-6-3-1-2-5-7(6)10-4-11-8(5)12/h1-4H,(H,10,11,12)
Chemical Name
8-chloro-3H-quinazolin-4-one
Synonyms
8-Chloro-4-quinazolinone
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 : ~5 mg/mL (~27.69 mM; with ultrasonication (<60°C))
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 0.5 mg/mL (2.77 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 5.0 mg/mL clear DMSO stock solution and add it to 900 μL corn oil and mix well.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 5.5374 mL 27.6870 mL 55.3741 mL
5 mM 1.1075 mL 5.5374 mL 11.0748 mL
10 mM 0.5537 mL 2.7687 mL 5.5374 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.

Calculator

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An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
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  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
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  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
g/mol

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Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
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Definitions of molecular mass, molecular weight, molar mass and molar weight:
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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.

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