Polyamines and their preparation

Details Polyamines and their preparation Polyamines and their preparation

C - Chemistry, Metallurgy

07

C

260/594.2, 260/6

C07C 211/13 (2006.01) C07C 209/48 (2006.01) C07C 211/63 (2006.01) C07C 217/42 (2006.01) C07C 233/36 (2006.01)

Patent

CA 2034076

- 9 - ABSTRACT The present invention is directed to polyamines re- presented by the following general structure: Image where R is an organic group, R' is H or CH3, and x=0 -3. Tri, tetra, penta and hexa amines, accordingly, are dis- closed. The method for making the novel polyamines comprises a multi-step reaction that commences in step (a) with the cyanoethylation of a primary amine, R-NH2, with acryloni- trile under cyanoethylation conditions to form an aminoni- trile of the structure R-NH-CH2-CH2-CN. The aminonitrile in step (b) is methylated by reaction with formic acid and formaldehyde under Leuckart reaction conditions to form a monomethyl aminonitrile of the structure R-N(CH3)-CH2-CH2- CN. The monomethyl aminonitrile then in step (c) is reduced, preferably by hydrogenation under hydrogenation conditions, to form a monomethyl diamine of the structure R-N(CH3)-CH2- CH2-CH2-NH2. The monomethyl diamine then in step (d) is chain extended again by cyanoethylation with acrylonitrile under cyanoethylation conditions to form a monomethyl dia- minonitrile of the structure R-N(CH3)-CH2-CH2-CH2-NH-CH2- CH2-CN. Finally, the monomethyl diaminonitrile in step (e) is reduced, preferably by hydrogenation under hydrogenation conditions to form the novel polyamine. Repeating step (b) results in R' being a methyl group. Repeating steps (d) and (e) extends x up to 4.

Affiliated with

Also associated with

Rating

Polyamines and their preparation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polyamines and their preparation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyamines and their preparation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1351358