Pyrrole derivatives useful as diazo and coupling components

US5003081A · kind A · utility

Assignee

• BASF SE

Inventors

• Juergen Pfister · Speyer, DE
• Matthias Wiesenfeldt · Mutterstadt, DE
• Karl-Heinz Etzbach · Bischofswerda, DE

Key dates

• Filing date: Jan 8, 1990
• Grant date: Mar 26, 1991
• Expiry date: Jan 8, 2010

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C1/58
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Pyrrole derivatives of the formula ##STR1## or the tautomers thereof, where R.sup.1 is hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, phenyl, hetaryl or amino, it being possible for these radicals to be substituted, PA0 R.sup.2 is hydrogen, alkyl, benzyl, alkenyl, cycloalkyl or phenyl PA0 R.sup.3 is hydrogen, alkyl, benzyl or alkenyl, or R.sup.2 and R.sup.3 together are ##STR2## where T.sup.1, T.sup.2 and T.sup.3 have the meanings mentioned in the description, or R.sup.2 and R.sup.3 together with the nitrogen connecting them are a heterocyclic radical, PA0 R.sup.4 is cyano, or carbamoyl or thiocarbamoyl, each of which can be substituted, or --C(NH.sub.2).dbd.N--OH, PA0 R.sup.5 is halogen, hydroxyl, alkanoyloxy or benzoyloxy and PA0 R.sup.6 is hydrogen, alkyl, phenyl, cyano, halogen, nitro, hydroxysulfonyl, alkanoyl, benzoyl or ##STR3## where T.sup.4 is alkyl or phenyl and T.sup.5 is the radical of an active methylene compound, hydroxyimino or the radical of a primary amine, with the proviso that R.sup.1, R.sup.2 and R.sup.3 are not all hydrogen, a process for the preparation of pyrrole derivatives (with R.sup.5 =hydroxyl) and the use of the novel products as diazo or coupling compo…