Synthesis of amino acid, n-carboxyanhydrides

C - Chemistry – Metallurgy – 07 – D

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C07D 263/04 (2006.01)

Patent

CA 2584311

A process for producing N-carboxyanhydrides is disclosed. The process produces N-carboxyanhydrides as a product and HCl as a by-product. The HCl by-product is purged from the reaction mixture by passing a purge gas through the reaction mixture as a carbonylation reagent is reacting with an amino acid or a salt thereof. The N-carboxyanhydrides produced by this process have a relatively lower chloride impurity content, relatively higher yields can be achieved, and the N-carboxyanhydrides can be produced on a larger scale.

L'invention concerne un procédé de production de N-carboxyanhydrides. Le procédé permet de produire des N-carboxyanhydrides comme produit et HCL comme sous-produit. Le sous-produit HCL est évacué du mélange réactif par le passage d'un gaz de purge dans le mélange réactif alors qu'un réagent de carbonylation réagit avec un acide aminé ou un de ses sels. Les N-carboxyanhydrides produits au moyen de ce procédé présentent une concentration en impureté de chlorure relativement plus faible, permettent de réaliser des rendements relativement plus élevés et les N-carboxyanhydrides peuvent être produits à une plus grande échelle.

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