Process for preparing n-aliphatic substituted...

Details Process for preparing n-aliphatic substituted... Process for preparing n-aliphatic substituted...

C - Chemistry, Metallurgy

07

C

C07C 211/53 (2006.01) C07C 209/02 (2006.01) C07C 209/36 (2006.01) C07C 209/68 (2006.01) C07D 295/135 (2006.01)

Patent

CA 2135309

A process for preparing N-aliphatic substituted p-phenylenediamine intermediates is provided which comprises contacting an aliphatic amine or substituted aliphatic amine derivative and nitrobenzene in the presence of a suitable solvent system, and reacting the aliphatic amine or substituted aliphatic amine derivative and nitrobenzene in the presence of a suitable base and a controlled amount of protic material at a suitable temperature in a confined reaction zone. In one embodiment, the N-aliphatic substituted p-phenylenediamine intermediates are reduced to N-aliphatic substituted p-phenylenediamines and the N-aliphatic substituted p-phenylenediamines can be reductively alkylated to N'-alkylated, N-aliphatic substituted p-phenylenediamines. In another embodiment of the invention, N-aliphatic substituted p- phenylenediamine intermediates are reductively alkylated to N'-alkylated, N-aliphatic-substituted p-phenylenediamines.

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