Production process for 5-alkyl-oxazolidin-2,4-dione

Details Production process for 5-alkyl-oxazolidin-2,4-dione Production process for 5-alkyl-oxazolidin-2,4-dione

2005-10-11

2005-10-11

Powers, Fiona T. (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

06953859

ABSTRACT:
The object of the present invention is to produce a 5-alkyl-oxazolidin-2,4-dione by an industrially advantageous method. The invention relates to novel process for producing a high-purity 5-alkyl-oxazolidin-2,4-dione comprising the steps of reacting a 2-hydroxycarboxylic acid amide with a carbonic acid ester in the presence of a metal alcoholate, thereby completing the reaction in one step, and then isolating the reaction product by a neutralization crystallization method.

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Wallingford et al.: “Alkyl Carbonates in Synthetic Chemistry. VI. Condensation with Alpha-Hydroxy Amides. A New Method for Preparing 2, 4-Oxazolidinediones.” J. Am. Chem. Soc., vol. 67, 1945, p. 522-523.
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V. H. Wallingford et al., “Alkyl Carbonates in Synthetic Chemistry, VI. Condensation with α-Hydroxy Amides. A New Method for Preparing 2, 4-Oxazolidinediones”, J. Am. Chem. Soc., 67, 1945, p. 522.

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