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CAS No.: | 940-07-8 |
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Name: | PYRAZINE-2,6-DICARBOXYLIC ACID |
Article Data: | 9 |
Molecular Structure: | |
Formula: | C6H4 N2 O4 |
Molecular Weight: | 168.109 |
Synonyms: | AKOS 90649;PYRAZINE-2,6-DICARBOXYLIC ACID;2,6-Pyrazinedicarboxylic acid |
Density: | 1.665±0.06 g/cm3 (20 oC 760 Torr), Calc.* |
Melting Point: | 225 oC** |
Boiling Point: | 491.3±45.0 °C(Predicted) |
Solubility: | Freely soluble (639 g/L) (25 oC), Calc.* |
PSA: | 100.38000 |
LogP: | -0.12700 |
dimethyl pyrazine-2,6-dicarboxylate
pyrazine-2,6-dicarboxylic acid
Conditions | Yield |
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Stage #1: dimethyl pyrazine-2,6-dicarboxylate With sodium hydroxide In tetrahydrofuran; water for 1h; Stage #2: With hydrogenchloride In tetrahydrofuran; water | 100% |
pyrazine-2,6-dicarbonitrile
pyrazine-2,6-dicarboxylic acid
Conditions | Yield |
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With sodium hydroxide |
2,3,5-pyrazine-tricarboxylic acid
A
pyrazine-2,6-dicarboxylic acid
B
2,5-pyrazinedicarboxylic acid
Conditions | Yield |
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With water |
2,3,5-pyrazine-tricarboxylic acid
A
pyrazine-2,6-dicarboxylic acid
B
diethyl pyrazine-2,5-dicarboxylate
Conditions | Yield |
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With water | |
With acetic acid |
6-chloro-pyrazine-2-carboxylic acid methyl ester
pyrazine-2,6-dicarboxylic acid
Conditions | Yield |
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Multi-step reaction with 3 steps 1.1: sodium hydride / mineral oil; tetrahydrofuran / 0.5 h 1.2: 20 h / Reflux 2.1: lithium carbonate / 0.5 h 2.2: 3 h / 0 °C 3.1: sodium hydroxide / water; tetrahydrofuran / 1 h View Scheme |
pyrazine-2,6-dicarboxylic acid
Conditions | Yield |
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Multi-step reaction with 2 steps 1.1: lithium carbonate / 0.5 h 1.2: 3 h / 0 °C 2.1: sodium hydroxide / water; tetrahydrofuran / 1 h View Scheme |
Conditions | Yield |
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In water suspn. Eu2O3 and ligand in water was heated at 80°C for 1 h, Cs2CO3 was added to pH 6.0, allowed to cool to room temp.; soln. was filtered and evapd. to dryness in vacuo, residue was recrystd.rom hot MeOH; elem. anal.; | 88% |
Conditions | Yield |
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In water High Pressure; mixt. of Cu(OAc)2*2H2O (0.1 mmol), pyrazine-2,6-dicarboxylic acid (0.1 mmol), 2,2'-bipyridine (0.1 mmol) and H2O (5 ml) sealed in Teflon-lined stainless steel reactor (23 ml); heated (140°C, 144 h); cooled to room temp.; crystals washed with deionized H2O; dried in air; elem. anal.; | 78% |
Conditions | Yield |
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In water dropwise addn. of TiCl4 to a suspn. of the dicarboxylic acid in water with stirring, warming to 50°C for 5 min; filtn. after cooling, ppt. is washed, dried, elem. anal.; | 75% |
1,2-bis(4'-pyridyl)ethane
pyrazine-2,6-dicarboxylic acid
water
[Cu2(pyrazine-2,6-dicarboxylic acid-2H)2(1,2-bis(4-pyridyl)-ethane)(H2O)2]
Conditions | Yield |
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With NaOH In water High Pressure; mixt. of Cu(OAc)2*2H2O (0.1 mmol), pyrazine-2,6-dicarboxylic acid (0.1 mmol), 1,2-bis(4-pyridyl)ethane (0.1 mmol), H2O (8 ml) and 0.65 M NaOH (0.15 ml) sealed in Teflon-lined stainless steel reactor (23 ml); heated (100°C, 96 h); cooled to room temp.; crystals washed with deionized H2O; dried in air; elem. anal.; | 73% |