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ChemicalBook--->CAS DataBase List--->4743-99-1

4743-99-1

4743-99-1 Structure

4743-99-1 Structure
IdentificationBack Directory
[Name]

4-(Hydroxyamino)-4-oxobutanoic acid
[CAS]

4743-99-1
[Synonyms]

Tofacitinib Impurity 208
N-Hydroxysuccinamidic acid
4-(Hydroxyamino)-4-oxobutanoic acid
3-(Hydroxyaminocarbonyl)propionic acid
Butanoic acid, 4-(hydroxyamino)-4-oxo-
[Molecular Formula]

C4H7NO4
[MOL File]

4743-99-1.mol
[Molecular Weight]

133.1
Chemical PropertiesBack Directory
[Melting point ]

82-86 °C(Solv: acetonitrile (75-05-8))
[density ]

1.436±0.06 g/cm3(Predicted)
[storage temp. ]

Inert atmosphere,Store in freezer, under -20°C
[pka]

5.28±0.10(Predicted)
Questions And Answer(Q&A)Back Directory
[Preparation]

To a refluxing solution of 5.0 gm (0.05 mole) of succinic anhydride in 100 ml of benzene is added a solution of 6.3 gm (0.05 mole) of O-ben- zylhydroxylamine in 20 ml of benzene. As soon as the addition has been completed, the reaction mixture is cooled, and the precipitated product is separated. Upon recrystallization from a benzene-methyl ethyl ketone mixture, 7.6 gm (68.2%) of N-benzyloxysuccinamic acid, m.p. 95-96°C isolated.
A suspension of 4.3 gm (0.0193 mole) of this intermediate and a stron- tium carbonate catalyst containing 5% palladium in methyl ethyl ketone is hydrogenated. Upon working up the reaction mixture, 1.45 gm (56.7%) of succinomonohydroxamic acid, m.p. 95-96°C is isolated.
Preparation of N-Hydroxysuccinamic Acid
Safety DataBack Directory
[Symbol(GHS) ]


GHS07
[Signal word ]

Warning
[Hazard statements ]

H315-H319-H335
[Precautionary statements ]

P261-P305+P351+P338
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