Process for the preparation of diketopyrrolopyrrolecarboxylic ac

Details Process for the preparation of diketopyrrolopyrrolecarboxylic ac Process for the preparation of diketopyrrolopyrrolecarboxylic ac

1997-09-19

1999-02-23

Richter, Johann

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548453, 548454, 548455, 548467, 5483415, 548519, 548400, 548255, 5483355, 5483751, 548440, 548490, 5483631, 568735, 546184, 546153, 544358, 544106, 544 59, C07D48702, C07D20902, C07D23360, C07D23358

Patent

active

058745882

ABSTRACT:
Diketopyrrolopyrroles of formula I ##STR1## are prepared by reacting a diketopyrrolopyrrole of formula II ##STR2## with a) formic acid or b) a compound of formula III

REFERENCES:
patent: 4415685 (1983-11-01), Iqbal et al.
patent: 4579949 (1986-04-01), Rochat et al.
patent: 4791204 (1988-12-01), Jost et al.
patent: 5476886 (1995-12-01), Wallquist et al.

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