Process for the synthesis of twin-tail triamines
The invention relates to a new method for producing twin-tail triamines, preferably fatty twin-tail triamines. Furthermore, the present invention relates to the production of diamines obtained from internal ketones. These diamines may be used in the method for producing twin-tail triamines according to the invention. Finally, the invention relates to a new aldehyde compound, which is an intermediate product of the method for producing twin-tail triamines of the invention.
1 . A method for producing a twin-tail triamine having the formula (I)
characterized in that in a first method step a diamine having the formula (II)
is reacted with an aldehyde having the formula (III)
to obtain an aldehyde having the formula (IV)
which is further reacted, in a second method step, with an amine having the formula (V)
under reductive amination conditions to obtain the twin-tail triamine according to formula (I), wherein
R 1 and R 2 independently represent a C 3 -C 27 aliphatic group,
R 3 and R 4 either independently represent a C 1 -C 8 alkyl group, or are linked together to form a ring of formula
wherein R 4 —R 3 represents a divalent hydrocarbon radical containing from 2 to 10 carbon atoms,
R 5 and R 6 either independently represent a C 1 -C 8 alkyl group, or are linked together to form a ring of formula
wherein R 5 -R 6 represents a divalent hydrocarbon radical containing from 2 to 10 carbon atoms,
R 7 , R 8 and R 9 independently represent hydrogen or a C 1 -C 8 alkyl group, and
E 1 represents a linear or branched divalent hydrocarbon radical with 2 to 24 carbon atoms, which can be optionally substituted and/or interrupted by one or more heteroatom containing groups.
2 . The method according to claim 1 , wherein E 1 is —(CH 2 ) 3 —, R 3 , R 4 , R 5 and R 6 are methyl, and R 7 , R 8 and R 9 are hydrogen.
3 . The method according to claim 1 , wherein the reaction of the diamine of formula (II) with the aldehyde of formula (III) is carried out in the presence of a catalyst chosen from amine compounds free of any primary group and any secondary amine group and amidine compounds free of any primary amine group and any secondary amine group.
4 . The method according to claim 3 , wherein the catalyst is selected from the group consisting of pyridine, 4-dimethylaminopyridine, picoline, diazabicyclo[5.4.0]undec-7-ene and 1,5-diazabicyclo[4.3.0]non-5-ene.
5 . The method according to claim 1 , wherein at least one method step is carried out in the presence of an organic solvent selected from the group consisting of methanol, ethanol, isopropanol, tert-butanol, tetrahydrofuran, 2-methyltetrahydrofuran, diethyl ether, methyl tert-butyl ether, 1,4-dioxane, dimethoxyethane, diglyme and mixtures thereof.
6 . The method according to claim 1 , wherein the reductive amination of the second method step is carried out at temperatures from 10 to 40° C. and at a hydrogen pressure from 40 to 60 bar by using a transition metal based catalyst supported on a carrier.
7 . The method according to claim 6 , wherein the metal of the transition metal based catalyst is a noble metal and the carrier is carbon.
8 . The method according to claim 1 , wherein the first and second method steps are carried out in a one-pot sequence.
9 . The method according to claim 1 , wherein the obtained twin-tail triamine is further reacted with a compound having the following formula (VI)
Y—R O (VI),
wherein Y—R O represents either hydrogen peroxide or a compound in which Y is a leaving group and R O is -Alk-CH(OH)—CH 2 —SO 3 M or -Alk-CO 2 M, wherein Alk represents an alkanediyl group and M is an alkaline metal or hydrogen
to obtain a twin-tail amine zwitterionic derivative having the following formula (Ia),
wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and E 1 are in accordance with the definitions for R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 and E 1 of claim 1 and R 10 and R 11 , which may be the same or different at each occurrence, represent a group selected from —O − , -Alk-CH(OH)—CH 2 —SO 3 − and -Alk-CO 2 − wherein Alk represents an alkanediyl group.
10 . The method according to claim 1 , further comprising producing the diamine having the formula (II)
characterized in that a ketone having the formula (VII)
is reacted with a diamine having the formula (VIII)
under reductive amination conditions by using a transition metal based catalyst supported on a carrier, at a temperature from 50 to 250° C. and under hydrogen pressure from 2 and 100 bar, wherein the reductive amination is not induced by a Lewis acid,
wherein
R 1 and R 2 independently represent a C 3 -C 27 aliphatic group,
R 3 and R 4 either independently represent a C 1 -C 8 alkyl group, or are linked together to form a ring of formula
wherein R 4 —R 3 represents a divalent hydrocarbon radical containing from 2 to 10 carbon atoms, and
E 1 represents a linear or branched divalent hydrocarbon radical with 2 to 24 carbon atoms, which can be optionally substituted and/or interrupted by one or more heteroatom containing groups.
11 . The method according to claim 5 , wherein the organic solvent is tetrahydrofuran.
12 . The method according to claim 7 , wherein the noble metal is Pt.
13 . The method according to claim 10 , wherein the transition metal of the catalyst is a noble metal.
14 . The method according to claim 10 , wherein the transition metal of the catalyst is selected from the group consisting of Pd, Pt, Rh, Ru, and mixture thereof.
15 . The method according to claim 10 , wherein the transition metal of the catalyst is Pt.
16 . The method according to claim 10 , wherein the carrier is selected from group consisting of carbon, silica, alumina, titania, zirconia, magnesia, ceria, zeolite, diatomaceous earth, and combinations thereof.
17 . The method according to claim 10 , wherein the carrier is carbon.
18 . The method according to claim 10 , wherein the reductive amination is carried out in the presence of an organic solvent selected from the group consisting of an aliphatic hydrocarbon having 5 to 10 carbon atoms, an aliphatic alcohol having 1 to 10 atom, an aromatic hydrocarbon having 6 to 20 carbon atoms, an oxygen-contain hydrocarbon having 4 to 10 carbon atoms, a nitrogen-containing hydrocarbon having 4 to 1o atoms, oxygen-containing aromatic hydrocarbon having 6 to 20 carbon atoms, nitrogen-containing aromatic hydrocarbon having 6 to 20 carbon atoms, and mixtures thereof.