Process for the preparation of n-carboxyanhydrides

Details Process for the preparation of n-carboxyanhydrides Process for the preparation of n-carboxyanhydrides

C - Chemistry, Metallurgy

07

D

C07D 263/44 (2006.01)

Patent

CA 2360033

The invention relates to a process for the preparation of N-carboxyanhydrides by reaction of the corresponding amino acid with phosgene, diphosgene and/or triphosgene in a solvent medium, characterized in that the reaction is a least partially carried out in the presence of an unsaturated organic compound which has one or more ethylenic double bonds, one of the carbon of at least one ethylenic double bond of which is completely substituted by substituents other than halogen atoms. The N-carboxyanhydrides are thus obtained with better yields and an improved purity.

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