PROCEDE DE PREPARATION D'AMINOACIDE COMPRENANT UNE ETAPE D'HYDROFORMYLATION D'UN NITRILE GRAS INSATURE

摘要

The present invention relates to a method for synthesising a omega-amino acid compound having formula HOOC-R'-CH2NH2, where R is an alkyl radical comprising between 6 and 15 carbon atoms or an alkylene radical comprising between 6 and 15 carbon atoms and between 0 and 2 unsaturations. The method comprises the following steps: 1) hydroformylation of an unsaturated fatty nitrile selected from compounds having formula R1-CH=CH-[(CH2)q-CH=CH]m-(CH2)r-CN, wherein R1 is H or an alkyl radical comprising between 1 and 11 carbon atoms comprising, where appropriate, a hydroxyl function, and q, m and r are integer indices such that q = 0 or 1, 0 <= m <= 2, and 4 < r < 13, and mixtures thereof, said step consisting in reacting the nitrile with the carbon monoxide and dihydrogen such as to obtain at least one fatty nitrile aldehyde having formula HOC-R'-CN; 2) dioxygen oxidation, wherein the nitrile aldehyde obtained in step 1) is converted into fatty nitrile acid having formula HOOC-R'-CN; and 3) reduction, in which the nitrile acid obtained in step 2) is converted into co-amino acid having formula HOOC-R'-CH2NH2. The present invention relates in particular to polyamide synthesis by means of polymerisation using the omega-amino acid obtained in step 3).