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EP0098808A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Preparation of 1,4-diketopyrrolo-(3,4-c)-pyrroles

Assignee: Novartis AG
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Filing: 1983-07-04
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Granted: —
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Expires: 2003-07-04
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Abstract

Abstract Translated from German Verfahren zur Herstellung von 1,4-Diketopyrrolo-[3,4-c]--pyrrolen der Formel worin Ri und R 2 die in Anspruch 1 angegebene Bedeutung haben, dadurch gekennzeichnet, dass man 1 Mol der Verbindung der Formel worin M, R 1 , Z, X und m die in Anspruch 1 angegebene Bedeutung haben, mit 1 Mol einer Verbindung der Formel YCH 2 COOZ und mit 1 Mol eines Nitrils der Formel R 1 -CN oder R 2 -CN, worin Y, Z, R 1 und R 2 die in Anspruch 1 angegebene Bedeutung haben, in einem organischen Lösungsmittel bei erhöhter Temperatur umsetzt und die Verbindung der Formel isoliert. Process for the preparation of 1,4-diketopyrrolo- [3,4-c] pyrroles of the formula wherein Ri and R 2 have the meaning given in claim 1, characterized in that 1 mol of the compound of the formula wherein M, R 1 , Z, X and m have the meaning given in claim 1, with 1 mol of a compound of the formula YCH 2 COOZ and with 1 mol of a nitrile of the formula R 1 -CN or R 2 -CN, where Y, Z, R 1 and R 2 have the meaning given in claim 1, are reacted in an organic solvent at elevated temperature and the compound of the formula is isolated. Die erfindungsgemäss hergestellten Verbindungen eignen sich zum Pigmentieren von hochmolekularem organischem Material. The compounds produced according to the invention are suitable for pigmenting high molecular weight organic material.

Inventors

  • 👤 Luigi Dr. Cassar
  • 👤 Abul Dr. Iqbal
  • 👤 Alain Claude Dr. Rochat

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 09:33
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; C07F; C07F3/00; C07F3/003; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415; C09; C09B; C09B57/00; C09B57/004

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