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| CAS No.: | 3934-20-1 |
|---|---|
| Name: | 2,4-Dichloropyrimidine |
| Molecular Structure: | |
|
|
|
| Formula: | C4H2Cl2N2 |
| Molecular Weight: | 148.979 |
| Synonyms: | 2,6-Dichloropyrimidine;Pyrimidine, 2,4-dichloro-; |
| EINECS: | 223-508-6 |
| Density: | 1.493 g/cm3 |
| Melting Point: | 57-61 °C(lit.) |
| Boiling Point: | 209.1 °C at 760 mmHg |
| Flash Point: | 104.3 °C |
| Solubility: | Soluble in water (partly), methanol, chloroform, and ethyl acetate. |
| Appearance: | White solid |
| Hazard Symbols: |
 Xi
|
| Risk Codes: | 36/37/38 |
| Safety: | 26-36-28A |
| Transport Information: | UN 1759 |
| PSA: | 25.78000 |
| LogP: | 1.78340 |
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| Conditions | Yield |
|---|---|
| With trichlorophosphate at 105℃; | 98% |
| With phosgene; Triphenylphosphine oxide In nitrobenzene at -5 - 105℃; for 0.666667h; Inert atmosphere; | 90% |
| With N-ethyl-N,N-diisopropylamine; trichlorophosphate at 0 - 95℃; for 3h; Sealed tube; | 82% |
| Conditions | Yield |
|---|---|
| With dmap; thionyl chloride; bis(trichloromethyl) carbonate at 65 - 70℃; | 95% |
| With dmap; thionyl chloride; bis(trichloromethyl) carbonate for 9.5h; Reflux; Green chemistry; | 95% |
| With pyridine; trichlorophosphate at 180℃; under 150.015 - 900.09 Torr; for 2h; Neat (no solvent); | 91% |
| With trichlorophosphate | |
| With thionyl chloride at 20℃; |
- 49844-90-8
4-Chloro-2-methylthiopyrimidine
- 3934-20-1
2,6-Dichloropyrimidine
| Conditions | Yield |
|---|---|
| With sulfuryl dichloride In dichloromethane; acetonitrile at 0℃; for 24h; | 60% |
| Conditions | Yield |
|---|---|
| With phosphorus pentachloride |
| Conditions | Yield |
|---|---|
| at 200℃; |
| Conditions | Yield |
|---|---|
| With ammonium chloride; zinc In water; acetone |
| Conditions | Yield |
|---|---|
| at 140℃; |
- 1336-21-6
ammonium hydroxide
- 166752-02-9
4,6-dichloro-5-methoxy-2-(2-naphthylmethylthio)-pyrimidine
A
- 3934-20-1
2,6-Dichloropyrimidine
| Conditions | Yield |
|---|---|
| In acetonitrile | |
| In acetonitrile |
- 138918-23-7
4,6-dihydroxy-5-benzylthiopyrimidine
A
- 3934-20-1
2,6-Dichloropyrimidine
B
- 138918-24-8
4,6-dichloro-5-benzylthiopyrimidine
| Conditions | Yield |
|---|---|
| With trichlorophosphate In chloroform | |
| With trichlorophosphate In chloroform |
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Chemistry
Structure of 2,4-Dichloropyrimidine (CAS NO.3934-20-1):
IUPAC Name: 2,4-dichloropyrimidine
Empirical Formula: C4H2Cl2N2
Molecular Weight: 148.9781
EINECS: 223-508-6
Index of Refraction: 1.559
Molar Refractivity: 32.22 cm3
Molar Volume: 99.7 cm3
Polarizability: 12.77×10-24cm3
Surface Tension: 51.5 dyne/cm
Density: 1.493 g/cm3
Flash Point: 104.3 °C
Enthalpy of Vaporization: 42.72 kJ/mol
Melting Point: 57-61 °C(lit.)
Boiling Point: 209.1 °C at 760 mmHg
Vapour Pressure: 0.298 mmHg at 25°C
Physical Appearance: White Solid
Product Categories: PYRIMIDINE;Pyrimidine Series;Pyridines, Pyrimidines, Purines and Pteredines;Halides;Pyrazines, Pyrimidines & Pyridazines;Heterocyclic Compounds;Building Blocks;Aromatics Compounds;Pyrimidines;Aromatics;Heterocycles;Pyrazines, Pyrimidines & Pyridazines;Building Blocks;Halogenated Heterocycles;Heterocyclic Building Blocks;PyrimidinesHeterocyclic Building Blocks
Safety Profile
Hazard Codes: 
Xi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-28
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
R36:Irritating to eyes.
R28:Very toxic if swallowed.
RIDADR: 1759
WGK Germany: 3
HazardClass: 8
PackingGroup: III
Specification
2,4-Dichloropyrimidine , its cas register number is 3934-20-1. It also can be called 2,6-Dichloropyrimidine ; Pyrimidine, 2,4-dichloro- .