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2,3-????????? ???????

2,3-????????? ???????
2,3-????????? ??????? ??? ???
?? ??:
4744-50-7
???:
2,3-????????? ???????
???(??):
2,3-????????????????;2,3-???????????
???:
2,3-Pyrazinecarboxylic anhydride
???(??):
FURO[3,4-B]PYRAZINE-5,7-DIONE;2,3-PYRAZINEDICARBOXYLIC ANHYDRIDE;PYRAZINE-2,3-DICARBOXYLIC ANHYDRIDE;2,3-Pyrazine Dicarbo;Zopiclone Impurity 5;pyrazine-2,3-dicarboxylic;furo[3,4-b]pyrazine-5,7-quinone;2,3-PYRAZINECARBOXYLIC ANHYDRIDE;2,3-PYRAZINEDICARBOXYLICANHYDRATE;2,3-PYRAZINEDICARBOXLIC ANHYDRIDE
CBNumber:
CB3208656
???:
C6H2N2O3
??? ??:
150.09
MOL ??:
4744-50-7.mol
MSDS ??:
SDS

2,3-????????? ??????? ??

???
210 °C (dec.)(lit.)
?? ?
357.3±22.0 °C(Predicted)
??
1.686±0.06 g/cm3(Predicted)
?? ??
Inert atmosphere,Room Temperature
???
?????(?? ???), DMSO
??? ??
??
??? ??
??? ??
?? ?? (pKa)
-3.43±0.20(Predicted)
??
?? ?? ?? ??? ??? ??
InChI
InChI=1S/C6H2N2O3/c9-5-3-4(6(10)11-5)8-2-1-7-3/h1-2H
InChIKey
AWJWCTOOIBYHON-UHFFFAOYSA-N
SMILES
C12C(=O)OC(=O)C1=NC=CN=2
LogP
-0.900 (est)
CAS ??????
4744-50-7(CAS DataBase Reference)
??
  • ?? ? ?? ??
  • ?? ? ???? ?? (GHS)
??? ?? Xi
?? ???? ?? 36/37/38
????? 26-36
WGK ?? 3
?? ?? ?? Irritant
HS ?? 29349990
????(GHS): GHS hazard pictograms
?? ?: Warning
??·?? ??:
?? ??·?? ?? ?? ?? ?? ?? ? ?? ?? P- ??
H315 ??? ??? ??? ????? ?? ????? ?? 2 ?? GHS hazard pictograms P264, P280, P302+P352, P321,P332+P313, P362
H319 ?? ?? ??? ??? ?? ? ?? ?? ??? ?? ?? 2A ?? GHS hazard pictograms P264, P280, P305+P351+P338,P337+P313P
H335 ?? ???? ??? ? ?? ?? ???? ?? - 1? ??;???? ?? ?? 3 ?? GHS hazard pictograms
??????:
P261 ??·?·??·???·??·...·????? ??? ????.
P264 ?? ??? ?? ??? ????.
P264 ?? ??? ?? ??? ????.
P271 ?? ?? ??? ? ?? ???? ?????.
P280 ????/???/???/?????? ?????.
P302+P352 ??? ??? ??? ?? ????.
P305+P351+P338 ?? ??? ? ?? ?? ???? ????. ???? ?????? ?????. ?? ????.

2,3-????????? ??????? C??? ??, ??, ??

??

2,?3-?Pyrazinedicarboxylic Anhydride is a reagent used in the synthesis of highly potent and selective abietane type diterpenoid amides.

Synthesis

Pyrazine-2,3-dicarboxylic acid (4.0 g, 23.8 mmol) was dissolved in acetic anhydride (30 mL).The reaction mixture was refluxed for one hour, and subsequently cooled down to 0 °C in ice bath.The obtained crystals of pyrazine-2,3-dicarboxylic anhydride were filtered off (yield 70%).
2,3-Pyrazinecarboxylic anhydride

2,3-????????? ??????? ?? ?? ? ???

???

?? ??


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???( 341)?? ??
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