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3430-26-0

Basic Information
CAS No.: 3430-26-0
Name: 2,5-Dibromo-4-methylpyridine
Article Data: 4
Molecular Structure:
Molecular Structure of 3430-26-0 (2,5-Dibromo-4-methylpyridine)
Formula: C6H5Br2N
Molecular Weight: 250.92
Synonyms: 2,5-Dibromo-4-methylpyridine;
EINECS: -0
Density: 1.911 g/cm3
Melting Point: 37-41 °C
Boiling Point: 262.8 °C at 760 mmHg
Flash Point: 112.7 °C
Appearance: light yellow to orange low melting solid
Hazard Symbols: HarmfulXn, IrritantXi
Risk Codes: 36/37/38-20/21/22
Safety: 36/37/39-26
PSA: 12.89000
LogP: 2.91500
Synthetic route
624-28-2

2,5-dibromopyridine

74-88-4

methyl iodide

3430-26-0

2,5-Dibromo-4-methylpyridine

Conditions
ConditionsYield
Stage #1: 2,5-dibromopyridine With lithium diisopropyl amide In tetrahydrofuran at -78℃; for 0.166667h;
Stage #2: methyl iodide In tetrahydrofuran for 0.5h;
86%
98198-48-2

2-amino-5-bromo-4-methylpyridine

3430-26-0

2,5-Dibromo-4-methylpyridine

Conditions
ConditionsYield
Stage #1: 2-amino-5-bromo-4-methylpyridine With hydrogen bromide; bromine; sodium nitrite In water at 0 - 5℃; for 1h;
Stage #2: With sodium hydroxide In water at 20℃; pH=~ 13;
68%
Stage #1: 2-amino-5-bromo-4-methylpyridine With hydrogen bromide; bromine; sodium nitrite In water at 0 - 5℃; for 1h;
Stage #2: With sodium hydroxide In water pH=~ 13;
68%
557-21-1

zinc(II) cyanide

3430-26-0

2,5-Dibromo-4-methylpyridine

886364-86-9

5-bromo-4-methyl-pyridine-2-carbonitrile

Conditions
ConditionsYield
With tetrakis(triphenylphosphine) palladium(0) In N,N-dimethyl-formamide at 150℃; for 0.0833333h; Negishi Coupling; Microwave irradiation; regioselective reaction;100%
3430-26-0

2,5-Dibromo-4-methylpyridine

2,4,6-trivinylcyclotriboroxane*pyridine complex

1122090-37-2

5-bromo-4-methyl-2-vinyl-pyridine

Conditions
ConditionsYield
With tetrakis(triphenylphosphine) palladium(0); potassium carbonate In 1,2-dimethoxyethane; water at 80℃; for 15h; Suzuki Coupling; Inert atmosphere;99%
With potassium carbonate; tetrakis(triphenylphosphine) palladium(0) In 1,2-dimethoxyethane; water at 80℃; for 15h; Suzuki Coupling;
With potassium carbonate; tetrakis(triphenylphosphine) palladium(0) In 1,2-dimethoxyethane; water at 80℃; for 15h; Inert atmosphere;
3430-26-0

2,5-Dibromo-4-methylpyridine

21655-48-1, 1013625-96-1

cis-2,6-dimethylpiperazine

(3S,5R)-1-(5-bromo-4-methylpyridin-2-yl)-3,5-dimethylpiperazine

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine In dimethyl sulfoxide at 110℃; for 18h;96%
3430-26-0

2,5-Dibromo-4-methylpyridine

141-52-6

sodium ethanolate

610279-04-4

5-bromo-2-ethoxy-4-methylpyridine

Conditions
ConditionsYield
In 1-methyl-pyrrolidin-2-one at 40 - 70℃; for 2h; Time;95%
3430-26-0

2,5-Dibromo-4-methylpyridine

17933-03-8

m-tolylboronic acid

2,5-(m-tolyl)-4-methylpyridine

Conditions
ConditionsYield
With dicyclohexyl-(2',6'-dimethoxybiphenyl-2-yl)-phosphane; tris-(dibenzylideneacetone)dipalladium(0); potassium phosphate monohydrate In water; toluene for 16h; Inert atmosphere; Reflux;93.3%
4318-42-7

1-(1-methylethyl)piperazine

3430-26-0

2,5-Dibromo-4-methylpyridine

919496-46-1

1-(5-bromo-4-methylpyridin-2-yl)-3-isopropyl-piperazine

Conditions
ConditionsYield
With pyridine for 5h; Heating / reflux;90%
3430-26-0

2,5-Dibromo-4-methylpyridine

98-80-6

phenylboronic acid

31686-64-3

5-bromo-4-methyl-2-phenylpyridine

Conditions
ConditionsYield
With tetrakis(triphenylphosphine) palladium(0); potassium carbonate In 1,2-dimethoxyethane; water at 90℃; for 12h; Inert atmosphere;90%
With palladium diacetate; potassium carbonate; triphenylphosphine In methanol; acetonitrile at 50℃; for 24h; Suzuki Coupling; Inert atmosphere; regioselective reaction;82%
With tetrakis(triphenylphosphine) palladium(0); potassium carbonate In 1,2-dimethoxyethane; water Reflux;77%
3430-26-0

2,5-Dibromo-4-methylpyridine

536-74-3

phenylacetylene

5-bromo-4-methyl-2-(phenylethynyl)pyridine

Conditions
ConditionsYield
With copper(l) iodide; palladium(II) trifluoroacetate; palladium diacetate; diisopropylamine In methanol; acetonitrile for 24h; Reflux; Inert atmosphere; regioselective reaction;90%
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  • 2,5-DIBROMO-4-METHYL PYRIDINE

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Chemistry

Molecular structure of 2,5-Dibromo-4-picoline (CAS NO.3430-26-0) is:

Product Name: 2,5-Dibromo-4-picoline
CAS Registry Number: 3430-26-0
IUPAC Name: 2,5-dibromo-4-methylpyridine
Molecular Weight: 250.9186 [g/mol]
Molecular Formula: C6H5Br2N
XLogP3-AA: 2.9
H-Bond Donor: 0
H-Bond Acceptor: 1
Melting Point: 37-41 °C
Surface Tension: 44.9 dyne/cm
Density: 1.911 g/cm3
Flash Point: 112.7 °C
Enthalpy of Vaporization: 48.04 kJ/mol
Boiling Point: 262.8 °C at 760 mmHg
Vapour Pressure: 0.0174 mmHg at 25°C
Product Categories: blocks;Bromides;Pyridines;Pyridine;Pyridine Series;Halides;Boronic Acid;Brominated heterocyclic series

Uses

 2,5-Dibromo-4-picoline (CAS NO.3430-26-0) is commonly used as pharmaceutical intermediate.

Safety Profile

Safty information about 2,5-Dibromo-4-picoline (CAS NO.3430-26-0) is:
Hazard Codes: HarmfulXn,Xi
Risk Statements: 36/37/38-20/21/22 
R36/37/38:Irritating to eyes, respiratory system and skin. 
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed.
Safety Statements: 36/37/39-26 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
Hazard Note: Harmful
HazardClass: IRRITANT

Specification

 2,5-Dibromo-4-picoline , its cas register number is 3430-26-0. It also can be called 2,5-Dibromo-4-methylpyridine .It is a light yellow to orange low melting solid.