Preparation of aminoformazans

Details Preparation of aminoformazans Preparation of aminoformazans

1993-06-23

1995-02-21

Higel, Floyd D.

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

Organic compounds

Azo

534618, C09B 5000, C09B 5010, C09B 62038, C09B 62018

Patent

active

053917197

ABSTRACT:
A process for preparing metal aminoformazans by alkaline hydrolysis of the corresponding acylated amino derivates in aqueous medium, is described, the hydrolysis being carried out at from 120.degree. to 170.degree. C. and from 3 to 5 bar in the presence of from 1.5 to 3 mol of an alkali metal hyroxide, based on 1 mol of acylated aminoformazan.

REFERENCES:
patent: 4720542 (1988-01-01), Omura et al.
patent: 4880434 (1989-11-01), Harada et al.
patent: 4906736 (1990-03-01), Schwaiger et al.
patent: 4935500 (1990-06-01), Omura et al.
patent: 5015731 (1991-05-01), Schwaiger et al.
Houben-Weyl "Methoden der Organischen Chemie", vol. XI/1, pp. 926 to 951, 1957.
Chem. Ber., vol. 88, pp. 895 to 899, 1955, Schmidt-Thome.

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