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Cas Database |
| Name |
2-Methylquinoxaline |
EINECS | 230-664-9 |
| CAS No. | 7251-61-8 | Density | 1.141 g/cm3 |
| PSA | 25.78000 | LogP | 1.93820 |
| Solubility | miscible with water | Melting Point |
180.5°C |
| Formula | C9H8N2 | Boiling Point | 243.9 °C at 760 mmHg |
| Molecular Weight | 144.176 | Flash Point | 107.2 °C |
| Transport Information | N/A | Appearance | dark red to brown liquid. |
| Safety | 26-36-24/25 | Risk Codes | 36/37/38 |
| Molecular Structure |
|
Hazard Symbols |
 Xi
|
| Synonyms |
NSC 65587; |
Article Data | 94 |
2-Methylquinoxaline Synthetic route
| Conditions | Yield |
|---|---|
| With 2,2,6,6-Tetramethyl-1-piperidinyloxy free radical; copper(II) acetate monohydrate In N,N-dimethyl-formamide at 20℃; Temperature; | 88% |
| With triethylamine; palladium diacetate In tetrahydrofuran; toluene at 20℃; for 3h; | 87% |
| With zinc(II) iodide In ethanol; water at 80℃; for 0.5h; | 86% |
| Conditions | Yield |
|---|---|
| In water for 0.0333333h; Isay condensation; microwave irradiation; | 95% |
| Stage #1: 2-oxopropanal With sodium disulfite In water for 0.166667h; Addition; Stage #2: 1,2-diamino-benzene In water at 20℃; for 18h; Condensation; Cyclization; | 91% |
| In water at 20℃; for 0.5h; Green chemistry; | 85% |
| Conditions | Yield |
|---|---|
| With cesiumhydroxide monohydrate In toluene at 150℃; for 24h; Inert atmosphere; Sealed tube; | 96% |
| With cesiumhydroxide monohydrate; C17H14Br2CoN4 In toluene at 150℃; for 24h; Reagent/catalyst; Temperature; Sealed tube; Inert atmosphere; | 93% |
| With 1,10-Phenanthroline; cesiumhydroxide monohydrate; nickel dibromide In toluene at 150℃; for 24h; Catalytic behavior; Reagent/catalyst; Solvent; Temperature; Inert atmosphere; Sealed tube; | 93% |
| Conditions | Yield |
|---|---|
| With cesiumhydroxide monohydrate In toluene at 150℃; for 24h; Inert atmosphere; Sealed tube; | 93% |
| With 1,10-Phenanthroline; cesiumhydroxide monohydrate; nickel dibromide In toluene at 150℃; for 24h; Inert atmosphere; Sealed tube; | 93% |
| With C18H24ClIrN3O(1+)*Cl(1-); potassium hydroxide In water for 24h; Mechanism; Schlenk technique; Reflux; Green chemistry; | 87% |
| Conditions | Yield |
|---|---|
| With cesiumhydroxide monohydrate; [(η6-p-cymene)2Ru2(2,7-bis(di-2-pyridinyl)-1,8-naphthyridine)Cl2](PF6)2; oxygen at 120℃; for 23h; Inert atmosphere; Molecular sieve; | 43% |
- 6640-55-7, 24463-30-7, 24463-31-8, 49849-47-0
2-methyl-1,2,3,4-tetrahydroquinoxaline
- 7251-61-8
2-methylquinoxaline
| Conditions | Yield |
|---|---|
| With 1,10-Phenanthroline; 2,2,6,6-Tetramethyl-1-piperidinyloxy free radical; potassium tert-butylate; oxygen; nickel dibromide In tert-Amyl alcohol at 95℃; for 48h; | 99% |
| With C21H21ClIrNO2 In tetrahydrofuran; 2,2,2-trifluoroethanol for 20h; Inert atmosphere; | 92% |
| With potassium tert-butylate In o-xylene at 140℃; for 36h; Inert atmosphere; | 91% |
| Conditions | Yield |
|---|---|
| With tetrakis(triphenylphosphine) palladium(0); caesium carbonate In N,N-dimethyl-formamide at 130℃; for 18h; Inert atmosphere; | 38 mg |
| Conditions | Yield |
|---|---|
| With potassium tert-butylate In tetrahydrofuran at 80℃; for 6h; Sealed tube; Inert atmosphere; | 78% |
| Conditions | Yield |
|---|---|
| Stage #1: 1,2-Dinitrobenzene With hydrogen In diethylene glycol dimethyl ether at 80℃; under 7500.75 Torr; for 24h; Stage #2: propylene glycol In diethylene glycol dimethyl ether at 140℃; for 30h; | 83% |
- 291536-12-4
N1-(prop-2-yn-1-yl)benzene-1,2-diamine
- 7251-61-8
2-methylquinoxaline
| Conditions | Yield |
|---|---|
| With tin(II) chloride hydrate In water; isopropyl alcohol at 82℃; for 12h; | 85% |
2-Methylquinoxaline Chemical Properties
IUPAC Name: 2-Methylquinoxaline
CAS: 7251-61-8
EINECS: 230-664-9
Product Categories: Quinolines, Quinazolines and Derivatives ; Building Blocks ; Heterocyclic Building Blocks ; Quinoxalines ; Alphabetical Listings ; Flavors and Fragrances ; M-N.
Following is the Molecular Structure of 2-Methylquinoxaline (7251-61-8):
SMILES: n1c2ccccc2nc(c1)C
InChI: InChI=1/C9H8N2/c1-7-6-10-8-4-2-3-5-9(8)11-7/h2-6H,1H3
InChIKey: ALHUXMDEZNLFTA-UHFFFAOYAA
Std. InChI: InChI=1S/C9H8N2/c1-7-6-10-8-4-2-3-5-9(8)11-7/h2-6H,1H3
Std. InChIKey: ALHUXMDEZNLFTA-UHFFFAOYSA-N
Molecular Formula: C9H8N2
Molecular Weight: 144.17
Boiling Point: 243.9℃ at 760mmHg
Flash Point: 107.2℃
Molar Volume: 126.2cm3
Density: 1.141g/cm3
Molar Refractivity: 45.1cm3
Surface Tension: 50.7dyne/cm
Polarizability: 17.88 10-24cm3
Enthalpy of Vaporization: 46.15 kJ/mol
Vapour Pressure: 0.0488mmHg at 25℃
Refractive Index: n20/D 1.613(lit.)
Water Solubility: Miscible
BRN: 113307
2-Methylquinoxaline Safety Profile
Hazard Codes: 
Xi Irritant.
Risk Statements: 36/37/38
R36 Irritating to eyes.
R37 Irritating to respiratory system.
R38 Irritating to skin
Safety Statements: 26-36-24/25
S24 Avoid contact with skin.
S25 Avoid contact with eyes.
S26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S27 Take off immediately all contaminated clothing.
S28 After contact with skin, wash immediately with plenty of soap-suds.
S29 Do not empty into drains.
S30 Never add water to this product.
S33 Take precautionary measures against static discharges.
S35 This material and its container must be disposed of in a safe way.
S36 Wear suitable protective clothing.
WGK Germany:3
RTECS:VD3450000
F:10
2-Methylquinoxaline Specification
2-Methylquinoxaline (7251-61-8),which also can be called for 2-Methyl-Quinoxalin ; Quinoxaline,2-Methyl- ; 2-Methylquinoxaline ; 2-Methylquinoxaline 97+% ; 2-Methylquinoxaline,96% ; Methylquinoxaline,2-Methylchinoxaline ; 2-Methylbenzopyrazine ; 3-Methylquinoxaline . 2-Methylquinoxaline (7251-61-8) is liquid,its colour is dark red to brown.It's slightly soluble in water.The followings are the first aid measures about this chemical:Ingestion:If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.Inhalation:Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.Skin:Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Remove contaminated clothing and shoes.Eyes:Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. 2-Methylquinoxaline(7251-61-8) should be stored in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. It is stable under normal temperatures and pressures.After decomposition,it turned into nitrogen oxides, carbon monoxide, carbon dioxide and nitrogen.
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