Aqueous process for the preparation of aromatic phosphorus compo

Details Aqueous process for the preparation of aromatic phosphorus compo Aqueous process for the preparation of aromatic phosphorus compo

1979-05-29

1981-07-21

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260198, 260199, 260200, 260202, 260204, 2602071, 260208, 260371, 260969, C09B 4300

Patent

active

042798132

ABSTRACT:
Phosphorus-containing compounds especially azo dyestuffs containing a grouping of the formula ##STR1## standing in ortho-position to the azo bridge are obtained in good yield if compounds of the formula ##STR2## are reacted with compounds of the formula ##STR3## in aqueous medium at a pH of 6-9 in the presence of copper or copper containing compounds.
The process is less expensive than applying the conventional solvent method.
In the above formulae:

REFERENCES:
patent: 3493639 (1970-02-01), Taus
patent: 3705214 (1972-12-01), Martin
patent: 4104270 (1978-08-01), Hall et al.

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