C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/278.1, 260/2
C07D 211/58 (2006.01) C07D 401/12 (2006.01)
Patent
CA 1336603
A process for the preparation of 2,2,6,6-tetramethyl-4-piperidylamine of the formula (I) Image (I) in which n is 1, 2 or 3 and, if n is 1, R is C1-C18-alkyl, C5-C12-cyclo- alkyl, C7-C9-phenylalkyl, tetrahydrofurfuryl, C2-C4-alkyl which is monosubstituted by OH, C1-C8-alkyloxy, C1-C8-alkylamino, cyclohexylamino or di(C1-C8-alkyl)amino, or C2-C6-alkyl which is substituted by an -NH2 group, or R is 2,2,6,6-tetramethyl-4-piperidyl, and, if n is 2, R is C2-C12-alkylene, cyclohexylene, methylenedicyclohexylene, cyclohexylene- dimethylene, xylylene or C4-C12-alkylene which is interrupted by 1, 2 or 3 oxygen atoms or 1 or 2 Image or Image groups, and, if n is 3, R is a group of the formula (II) (II) Image in which x and y are identical or different and are integers from 2 to 6 and z is zero or 1, characterized in that 2,2,6,6-tetramethyl-4- piperidone is reacted with an amine of the formula (III) R-(NH2)n (III) in which R and n are as defined above, in the presence of hydrogen and of a hydrogenation catalyst, unsupported or supported on an inert material, in the absence of a solvent or in the presence of a quantity of water less than 10 % by weight relative to the reaction mixture.
573266
Cassandrini Paolo
Righini Giordano
Vignali Graziano
Cassandrini Paolo
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
Righini Giordano
Vignali Graziano
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