Process for the manufacture of p-phenetidine

Details Process for the manufacture of p-phenetidine Process for the manufacture of p-phenetidine

1995-04-06

1996-02-20

Kumar, Shailendra

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

534588, 534596, 564443, C07C20942

Patent

active

054930553

ABSTRACT:
A process for the manufacture of para-phenetidine is described. The process comprises the following steps: (a) diazotizing para-phenetidine and coupling the resulting compound to phenol at a molar ratio of 1.3 to 1 phenol to the diazo compound;(b) ethylating the resulting compound at a temperature in the range of between 130.degree. C. to 200.degree. C., and (c) catalytically hydrogenating the ethylated compound, whereby two moles of para-phenetidine are produced, one of which being recycled as the starting reagent in the first step. The product obtained is of a high purity being substantially free from the undesired isomers.

REFERENCES:
patent: 2571091 (1951-10-01), Wasserman
patent: 4124640 (1978-11-01), Shinohara et al.
patent: 5382691 (1995-01-01), Stern et al.

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