ChemicalBook--->CAS DataBase List--->99208-71-6

99208-71-6

99208-71-6 Structure

99208-71-6 Structure
IdentificationBack Directory
[Name]

(S)-3,3-DiMethyltetrahydropyrrolo[1,2-c]oxazol-5(3H)-one
[CAS]

99208-71-6
[Synonyms]

EOS-61025
(S)-3,3-Dimethyltetrahydropyrrolo[1,2-c]oxazol-5(1H)-one
(S)-3,3-DiMethyltetrahydropyrrolo[1,2-c]oxazol-5(3H)-one
(5S)-1-aza-2,2-dimethyl-3-oxa-8-oxo-bicyclo[3.3.0]octane
(S)-3,3-dimethyltetrahydro-3H,5H-pyrrolo[1,2-c]oxazol-5-one
(7aS)-3,3-dimethyl-hexahydropyrrolo[1,2-c][1,3]oxazol-5-one
3H,5H-Pyrrolo[1,2-c]oxazol-5-one, tetrahydro-3,3-dimethyl-, (7aS)-
(7aS)-3,3-dimethyl-1,6,7,7a-tetrahydropyrrolo[1,2-c][1,3]oxazol-5-one
[Molecular Formula]

C8H13NO2
[MDL Number]

MFCD26940310
[MOL File]

99208-71-6.mol
[Molecular Weight]

155.194
Chemical PropertiesBack Directory
[Boiling point ]

262.2±19.0 °C(Predicted)
[density ]

1.15±0.1 g/cm3(Predicted)
[storage temp. ]

Sealed in dry,2-8°C
[pka]

-0.70±0.40(Predicted)
[Appearance]

white solid
[CAS DataBase Reference]

99208-71-6
Safety DataBack Directory
[Symbol(GHS) ]

Exclamation Mark (GHS07)
GHS07
[Signal word ]

Warning
[Hazard statements ]

H335-H319-H315
[Precautionary statements ]

P264-P280-P302+P352-P321-P332+P313-P362-P264-P280-P305+P351+P338-P337+P313P
Spectrum DetailBack Directory
[Spectrum Detail]

(S)-3,3-DiMethyltetrahydropyrrolo[1,2-c]oxazol-5(3H)-one(99208-71-6)1HNMR
Hazard InformationBack Directory
[Synthesis]

2,2-Dimethoxypropane

77-76-9

L-Pyroglutaminol

17342-08-4

(S)-3,3-DiMethyltetrahydropyrrolo[1,2-c]oxazol-5(3H)-one

99208-71-6

To a 500 ml solution of toluene containing 23.12 g of (S)-(+)-5-hydroxymethyl-2-pyrrolidinone and 0.18 g of p-toluenesulfonic acid, 70 ml of 2,2-dimethoxypropane was slowly added at room temperature. The reaction mixture was heated to reflux with continuous stirring for 2 hours. Subsequently, the volatile components were removed by distillation at a temperature range of 65°C to 92°C. To the residue, 70 ml of 2,2-dimethoxypropane was added again and the mixture was heated to reflux for 2 hours. After completion of the reaction, the reaction mixture was cooled and concentrated to afford the crude product (S)-3,3-dimethyltetrahydropyrrolo[1,2-c]oxazol-5-(3H)-one. The final yield was 29.82 g in 96% of the theoretical value.

[References]

[1] Patent: US2013/23502, 2013, A1. Location in patent: Paragraph 0322-0324
[2] Tetrahedron Asymmetry, 2002, vol. 13, # 6, p. 647 - 658
[3] Journal of Organic Chemistry, 2001, vol. 66, # 26, p. 8831 - 8842
[4] Organic letters, 1999, vol. 1, # 13, p. 2105 - 2107
[5] Bioorganic and Medicinal Chemistry, 2012, vol. 20, # 23, p. 6885 - 6893
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