C - Chemistry – Metallurgy – 07 – H
Patent
C - Chemistry, Metallurgy
07
H
C07H 15/04 (2006.01) C07C 231/02 (2006.01) C07C 235/04 (2006.01)
Patent
CA 2179115
The present invention generally relates to a process for preparing an N-substituted aldonamide by reacting an aldonic acid in a polar organic solvent with an amine of the formula HNR1(X- NR1)nR2, wherein R1 and R? may be the same or different and represent a hydrogen atom, a (cyclo)aliphatic or aromatic hydrocarbon separated by a hetero-atom or not, an amino acid ester, an amino acid amide, an ether amine or an N-alkanoyl alkylene diamine according to the formula R3-C(O)N(H)-R4-, wherein R3 = C1 - C24 alkyl or alkenyl and R4 = C2 - C22 branched or linear alkylene group, which may contain heteroatoms like N, O, and S, X is a difunctional (cyclo)aliphatic or aromatic hydrocarbon separated or not by a heteroatom or a hydrocarbon substituted hetero-atom, and n = 0 or 1, with the proviso that when n = 0, R1 and R2do not stand for a hydrogen atom simultaneously, characterised in that an aqueous syrup of the aldonic acid is reacted, optionally after esterification with an alcohol with simultaneous distilling off of the water which is present, at a temperature in the range of 30° to 120°C, with the amille in the organic solvent, which is distilled off wholly or in part simulta- neously with any water still present and/or formed.
Jansen Andrea Katharina
Weuste Burkhard
Akzo Nobel Nv
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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