Sandoz Gmbh

Clariant Finance (bvi) Limited

Other

Jose Rocas Sorolla

Jordi B Barra

Herbert Holliger

Jordi Berenguer Barra

The invention provides a compound of formula

Polyazo dyes containing the radical of a bis-coupling component, and

Compounds of the formula ##STR1## iron complexes thereof and mixtures of such iron complexes, wherein D is a monocyclic or bicyclic aromatic diazo component radical of the benzene series containing one --SO.sub.3 M group or is ##STR2## R.sub.1 is hydrogen, methyl or ethyl, and R.sub.4 is hydrogen, chloro or C.sub.1-2 alkyl, wherein R' is hydrogen, C.sub.1-4 alkyl, C.sub.2-4 hydroxyalkyl, methoxy(C.sub.2-4 alkyl) or ##STR3## R' is hydrogen, C.sub.1-4 alkyl, C.sub.2-4 hydroxyalkyl or methoxy(C.sub.2-4 alkyl), or

Metallizable disazo compounds having 1, 3-dihydroxybenzene bis-coupling

The invention provides a process for the production of azodyes and their derivatives by diazotization and coupling reactions and optionally further modification reactions, wherein a compound of formula ##STR1## in which E signifies an aromatic bivalent radical,

Process for preparing azo dyes containing A2-

The invention provides a 1:2 metal complex in which at least one of the complexants is a polyazo compound of formula ##STR1## wherein --A.sub.1 --(CO).sub.p --OH signifies the radical of a diazo component of formula H.sub.2 N--A--(CO).sub.p --OH, in which the substituent --(CO).sub.p --OH is in ortho-position to the diazotizable amino group --NH.sub.2, --A-- is the ortho-bivalent radical and p signifies 0 or 1, or a modified derivative thereof,

1:2 metal complexes of polyazo dyes having a sulpho substituted

Azo dyes containing a 2-(arylsulphonylamino)pyrimidine radical

Azo dyes containing a 2-(arylsulphonylamino)-pyrimidine radical and

2-(arylsulphonylamino)-pyrimidine intermediates for Azo dyes

Mixtures of iron complexes of metallizable disazo compounds, at least one compound being of the formula ##STR1## and at least one compound being of the formula ##STR2## wherein the substituents have the meaning given in the specification, are useful for dyeing substrates dyeable with anionic dyes, e.g., leather.

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Barcelona, Spain

Jose Rocas Sorolla