Process for the preparation of vat dyes

Details Process for the preparation of vat dyes Process for the preparation of vat dyes

1980-05-15

1982-05-11

Ford, John M.

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

Organic compounds

Chalcogen in the nitrogen containing substituent

544188, 544100, 544187, C07D41310, C07D25152, C07D25170, C07D40310

Patent

active

043294561

ABSTRACT:
The present invention relates to a process for the preparation of vat dyes of the formula ##STR1## in which A is a vattable radical, X is an acyl radical and Y' is a halogen atom, an amino group or an aryloxy group, which comprises acylating compounds of the formula ##STR2## in which A is as defined under formula (1) and Y is a halogen atom, with an acylating agent which contains the acyl radical X, and, if desired, subjecting the compounds of the formula (2), before or after acylation, to a condensation reaction with an amine or an aromatic hydroxy compound.

REFERENCES:
patent: 3639430 (1972-02-01), Altermatt
patent: 3684808 (1972-08-01), Ulrich
patent: 3870717 (1975-03-01), Ulrich et al.
patent: 3920632 (1975-11-01), Hohmann et al.

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