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1,1,4,4,6-Pentamethyl-1,2,3,4-tetrahydronaphthalene

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Name

1,1,4,4,6-Pentamethyl-1,2,3,4-tetrahydronaphthalene

EINECS 229-724-7
CAS No. 6683-48-3 Density 0.882 g/cm3
PSA 0.00000 LogP 4.34400
Solubility N/A Melting Point 31
Formula C15H22 Boiling Point 267.4 °C at 760 mmHg
Molecular Weight 202.34 Flash Point 112.5 °C
Transport Information N/A Appearance N/A
Safety 26-36/37/39 Risk Codes 20/21/22
Molecular Structure Molecular Structure of 6683-48-3 (1,1,4,4,6-Pentamethyl-1,2,3,4-tetrahydronaphthalene) Hazard Symbols IrritantXi
Synonyms

1,2,3,4-TETRAHYDRO-1,1,4,4,6-PENTAMETHYLNAPHTHALENE;1,2,3,4-TETRAHYDRO-1,1,4,4,6-PENTAMETHYLNAPHTHYLENE;1,1,4,4,6-PENTAMETHYL-1,2,3,4-TETRAHYDRONAPHTHALENE;1,2,3,4-Tetrahydro-1,1,4,4,6-pentamethylnaphtalene;1,1,4,4,6-Pentamethyl-1,2,3,4-;1,2,3,4-TETRAHYDRO-1,1,4,4,6-PENTAMETHYLNAPHTALENE: TECH.;1,1,4,4,6-Pentamethyltetralin;1,1,4,4,6-Pentamethyl-1,2,3,4-etrahydronaphthalene

Article Data 46

1,1,4,4,6-Pentamethyl-1,2,3,4-tetrahydronaphthalene Synthetic route

6223-78-5

2,5-dichloro-2,5-dimethyl hexane

108-88-3

toluene

6683-48-3

1,1,4,4,6-pentamethyl-1,2,3,4-tetrahydronaphthalene

Conditions
ConditionsYield
With aluminium trichloride for 12h; Heating;99%
With aluminium trichloride In dichloromethane at 20℃; Friedel-Crafts alkylation;99%
With aluminium trichloride In dichloromethane Friedel-Crafts alkylation; Heating;97%
6223-78-5

2,5-dichloro-2,5-dimethyl hexane

6683-48-3

1,1,4,4,6-pentamethyl-1,2,3,4-tetrahydronaphthalene

Conditions
ConditionsYield
With aluminum (III) chloride In toluene for 0.416667h;97%
167958-79-4

1,1,4,4,6-pentamethyl-1,4-dihydronaphthalene

6683-48-3

1,1,4,4,6-pentamethyl-1,2,3,4-tetrahydronaphthalene

Conditions
ConditionsYield
With hydrogen; palladium on activated charcoal In ethyl acetate for 1h;80%
108-88-3

toluene

6683-48-3

1,1,4,4,6-pentamethyl-1,2,3,4-tetrahydronaphthalene

Conditions
ConditionsYield
Stage #1: 2,5-dimethyl-2,5-hexanediol With hydrogenchloride In water at 20℃; for 1h;
Stage #2: toluene With aluminum (III) chloride In dichloromethane at 20℃; for 3h;
76%
127459-66-9

5,6,7,8-tetrahydro-3,5,5,8,8-pentamethylnaphthalene-1-carbaldehyde

6683-48-3

1,1,4,4,6-pentamethyl-1,2,3,4-tetrahydronaphthalene

Conditions
ConditionsYield
With Wilkinson's catalyst In toluene Heating;
110-03-2

2,5-dimethyl-2,5-hexanediol

6683-48-3

1,1,4,4,6-pentamethyl-1,2,3,4-tetrahydronaphthalene

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: HCl conc. / 3 h / 20 °C
2: 99 percent / AlCl3 / CH2Cl2 / 20 °C
View Scheme
Multi-step reaction with 2 steps
1: 56 percent / HCl gas / ethanol
2: 91 percent / AlCl3 / CH2Cl2 / 1.) RT, 30 min, 2.) reflux, 15 min
View Scheme
Multi-step reaction with 2 steps
1: conc. HCl, HCl gas / 0.25 h / 0 °C
2: 80.4 percent / AlCl3 / 1 h / 0 °C
View Scheme
29020-85-7

1,1,4,4,7-pentamethyl-2-oxo-1,2,3,4-tetrahydronaphthalene

6683-48-3

1,1,4,4,6-pentamethyl-1,2,3,4-tetrahydronaphthalene

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 87 percent / LiAlH4 / diethyl ether / 1 h / Heating
2: 79 percent / POCl3, pyridine / 100 °C
3: 80 percent / H2 / 10percent Pd/C / ethyl acetate / 1 h
View Scheme
5455-94-7

2,2,5,5-tetramethyltetrahydro-3-oxofuran

6683-48-3

1,1,4,4,6-pentamethyl-1,2,3,4-tetrahydronaphthalene

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: 45 percent / AlCl3 / 2 h / 0 - 20 °C
2: 87 percent / LiAlH4 / diethyl ether / 1 h / Heating
3: 79 percent / POCl3, pyridine / 100 °C
4: 80 percent / H2 / 10percent Pd/C / ethyl acetate / 1 h
View Scheme
108-88-3

toluene

(+-)-o-toluenesulfinic acid-chloride

(+-)-o-toluenesulfinic acid-chloride

6683-48-3

1,1,4,4,6-pentamethyl-1,2,3,4-tetrahydronaphthalene

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: 45 percent / AlCl3 / 2 h / 0 - 20 °C
2: 87 percent / LiAlH4 / diethyl ether / 1 h / Heating
3: 79 percent / POCl3, pyridine / 100 °C
4: 80 percent / H2 / 10percent Pd/C / ethyl acetate / 1 h
View Scheme
167958-78-3

1,1,4,4,7-pentamethyl-2-hydroxy-1,2,3,4-tetrahydronaphthalene

6683-48-3

1,1,4,4,6-pentamethyl-1,2,3,4-tetrahydronaphthalene

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 79 percent / POCl3, pyridine / 100 °C
2: 80 percent / H2 / 10percent Pd/C / ethyl acetate / 1 h
View Scheme

1,1,4,4,6-Pentamethyl-1,2,3,4-tetrahydronaphthalene Chemical Properties

The Molecular Structure of 1,1,4,4,6-Pentamethyl-1,2,3,4-tetrahydronaphthalene (CAS NO.6683-48-3):

Empirical Formula: C15H22
Molecular Weight: 202.3352
Nominal Mass: 202 Da
Average Mass: 202.3352 Da
Monoisotopic Mass: 202.172151 Da 
Index of Refraction: 1.491
Molar Refractivity: 66.5 cm3
Molar Volume: 229.3 cm3
Surface Tension: 30.1 dyne/cm
Density: 0.882 g/cm3
Flash Point: 112.5 °C
Enthalpy of Vaporization: 48.51 kJ/mol
Boiling Point: 267.4 °C at 760 mmHg
Melting Point: 31 °C 
Vapour Pressure: 0.0134 mmHg at 25°C 
IUPAC Name: 1,1,4,4,6-pentamethyl-2,3-dihydronaphthalene   
Product Categories: Fused Ring Systems
Synonyms: 1,2,3,4-Tetrahydro-1,1,4,4,6-pentamethylnaphthalene ; 1,2,3,4-Tetrahydro-1,1,4,4,6-pentamethylnaphthylene ; 1,1,4,4,6-pentamethyl-1,2,3,4-tetrahydronaphthalene ; 1,2,3,4-Tetrahydro-1,1,4,4,6-pentamethylnaphtalene ; 1,1,4,4,6-Pentamethyl-1,2,3,4- ; 1,2,3,4-Tetrahydro-1,1,4,4,6-pentamethylnaphtalene tech ; 1,1,4,4,6-Pentamethyltetralin ; 1,1,4,4,6-Pentamethyl-1,2,3,4-etrahydronaphthalene       

1,1,4,4,6-Pentamethyl-1,2,3,4-tetrahydronaphthalene Safety Profile

Hazard Codes: IrritantXi
Risk Statements: 20/21/22 
R20/21/22: Harmful by inhalation, in contact with skin and if swallowed
Safety Statements: 26-36/37/39 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection
Hazard Note: Irritant
HazardClass: IRRITANT

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