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????-4,4-???-2,3-????

????-4,4-???-2,3-????
????-4,4-???-2,3-???? ??? ???
?? ??:
13031-04-4
???:
????-4,4-???-2,3-????
???(??):
????-4,4-???-2,3-????
???:
DIHYDRO-4,4-DIMETHYL-2,3-FURANDIONE
???(??):
DIHYDRO-4;3-FURANDIONE;4-DIMETHYL-2;Ketopantolactone;keto-pantoyllactone;2-dehydropantolactone;alpha-Ketopantolactone;Dexpanthenol iMpurity D;Dexpanthenol Impurity 5;Dexpanthenol Impurity 12
CBNumber:
CB9739987
???:
C6H8O3
??? ??:
128.13
MOL ??:
13031-04-4.mol
MSDS ??:
SDS

????-4,4-???-2,3-???? ??

???
67-69 °C (lit.)
?? ?
125-126℃ (15 Torr)
??
1.152±0.06 g/cm3(Predicted)
?? ??
under inert gas (nitrogen or Argon) at 2-8°C
???
??????: ???25mg/mL, ??, ??~???
??? ??
??
??? ??
??? ??
??
?????
InChI
InChI=1S/C6H8O3/c1-6(2)3-9-5(8)4(6)7/h3H2,1-2H3
InChIKey
HRTOQFBQOFIFEE-UHFFFAOYSA-N
SMILES
O1CC(C)(C)C(=O)C1=O
??
  • ?? ? ?? ??
  • ?? ? ???? ?? (GHS)
WGK ?? 3
???? ??? 11 - Combustible Solids
????(GHS): Exclamation Mark (GHS07)
?? ?: Warning
??·?? ??:
?? ??·?? ?? ?? ?? ?? ?? ? ?? ?? P- ??
H315 ??? ??? ??? ????? ?? ????? ?? 2 ?? P264, P280, P302+P352, P321,P332+P313, P362
H319 ?? ?? ??? ??? ?? ? ?? ?? ??? ?? ?? 2A ?? P264, P280, P305+P351+P338,P337+P313P
H335 ?? ???? ??? ? ?? ?? ???? ?? - 1? ??;???? ?? ?? 3 ??
??????:
P264 ?? ??? ?? ??? ????.
P264 ?? ??? ?? ??? ????.
P280 ????/???/???/?????? ?????.
P302+P352 ??? ??? ??? ?? ????.
P305+P351+P338 ?? ??? ? ?? ?? ???? ????. ???? ?????? ?????. ?? ????.
P321 (…) ??? ???.
P332+P313 ?? ??? ??? ???? ??· ??? ????.
P362 ??? ??? ?? ?? ?? ?????

????-4,4-???-2,3-???? C??? ??, ??, ??

Synthesis Reference(s)

Synthetic Communications, 14, p. 697, 1984 DOI: 10.1080/00397918408063756

?? ??

Dihydro-4,4-dimethyl-2,3-furandione is an activated keto compound and its enantioselective hydrogenation was reported. Neutral Rhodium (I) aminophosphine-phosphinite complex calatyzed asymmetric hydrogenation of dihydro-4,4-dimethyl-2,3-furandione was reported. Asymmetric hydrogenation of dihydro-4,4-dimethyl-2,3-furandione gives D-(-)-pantoyl lactone, a key intermediate in the synthesis of pantothenic acid.

????-4,4-???-2,3-???? ?? ?? ? ???

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????-4,4-???-2,3-???? ?? ??

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????-4,4-???-2,3-???? ?? ??:

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