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CAS No.: | 5910-89-4 |
---|---|
Name: | 2,3-Dimethylpyrazine |
Article Data: | 25 |
Molecular Structure: | |
Formula: | C6H8N2 |
Molecular Weight: | 108.143 |
Synonyms: | Pyrazine, 2,3-dimethyl-;2,3-Dimethyl-1,4-diazine;FEMA No. 3271;2,3-Di Methyl Pyrazine; |
EINECS: | 227-630-0 |
Density: | 0.997 g/cm3 |
Melting Point: | 11-13 °C |
Boiling Point: | 158.1 °C at 760 mmHg |
Flash Point: | 54.4 °C |
Appearance: | clear yellow to orange liquid |
Hazard Symbols: | Xn, F, Xi |
Risk Codes: | 10-22-37/38-41 |
Safety: | 16-26-39 |
Transport Information: | UN 1993 3/PG 3 |
PSA: | 25.78000 |
LogP: | 1.09340 |
Conditions | Yield |
---|---|
With γ-maghemite-silica nanocomposite In neat (no solvent) at 55℃; for 6h; Green chemistry; | 94% |
With diethyl ether at 0℃; Erwaermen des Reaktionsprodukts und Oxydation des erhaltenen 2.3-Dimethyl-5.6-dihydro-pyrazins mit Fehlingscher Loesung; |
Conditions | Yield |
---|---|
at 180℃; |
2,3-dimethyl-piperazine
2,3-dimethylpyrazine
Conditions | Yield |
---|---|
With aluminum oxide; copper oxide-chromium oxide silicon dioxide aluminium oxide catalyst; water; silica gel at 350 - 400℃; |
5,6-dimethyl-2,3-pyrazinedicarboxylic acid
2,3-dimethylpyrazine
Conditions | Yield |
---|---|
In acetic acid at 200℃; for 1h; Yield given; |
2-<2-Hydroxy-2-(p-methoxyphenyl)ethyl>-3-methylpyrazine
A
2,3-dimethylpyrazine
B
4-methoxy-benzaldehyde
Conditions | Yield |
---|---|
In diethylene glycol dimethyl ether at 170℃; Rate constant; |
D-(+)-Glucose
A
1,4-pyrazine
B
2-Methylpyrazine
C
2,5-dimethyl-pyrazine
D
2,3-dimethylpyrazine
E
2,6-dimethylpyrazine
F
2,3,5-trimethylpyrazine
Conditions | Yield |
---|---|
With ammonium hydroxide In glycerol for 9h; Product distribution; Heating; also with amino acids; |
2,3-dimethylpyrazine
Conditions | Yield |
---|---|
With acetic acid at 180℃; im Rohr; |
D-Glucose
L-leucine
A
1,4-pyrazine
B
2-Methylpyrazine
C
2,5-dimethyl-pyrazine
D
2,3-dimethylpyrazine
E
2,6-dimethylpyrazine
F
2,3,5-trimethylpyrazine
Conditions | Yield |
---|---|
With ammonium hydroxide In glycerol at 120℃; for 4h; Product distribution; var. times, solvents, temp., and ratios of reactants, also without leucine; |
D-glucose
H-Lys-Lys-OH hydrochloride
A
1,4-pyrazine
B
2-Methylpyrazine
C
2,5-dimethyl-pyrazine
D
2,3-dimethylpyrazine
E
2-ethyl-3,6-dimethylpyrazine
F
2,6-dimethylpyrazine
G
2,3,5-trimethylpyrazine
H
3-ethenyl-2,5-dimethylpyrazine
I
2-ethyl-6-methylpyrazine
Conditions | Yield |
---|---|
In water at 130℃; for 2h; pH=8; Maillard reaction; |
H-Lys-Lys-OH hydrochloride
2-oxopropanal
A
2-Methylpyrazine
B
2,5-dimethyl-pyrazine
C
2,3-dimethylpyrazine
D
2-ethyl-3,6-dimethylpyrazine
E
2,6-dimethylpyrazine
F
3,5-dimethyl-2-(Z-1-propenyl)-pyrazine
G
2,3,5-trimethylpyrazine
H
3-ethenyl-2,5-dimethylpyrazine
I
2-ethyl-3,5-dimethylpyrazine
J
2,3-dimethyl-5-ethylpyrazine
Conditions | Yield |
---|---|
In water at 130℃; for 2h; pH=8; Maillard reaction; |
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1. | orl-rat LD50:613 mg/kg | DCTODJ Drug and Chemical Toxicology. 3 (1980),249. | ||
2. | ipr-mus LD50:1390 mg/kg | TXAPA9 Toxicology and Applied Pharmacology. 17 (1970),244. |