Chromogenic lactam compounds, their preparation and their use

Details Chromogenic lactam compounds, their preparation and their use Chromogenic lactam compounds, their preparation and their use

1994-04-07

1995-06-20

Bernhardt, Emily

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

Organic compounds

Chalcogen in the nitrogen containing substituent

544 89, 548216, 548217, 548224, C07D49804

Patent

active

054261929

ABSTRACT:
Chromogenic lactam compounds of the formula ##STR1## in which the ring A is an aromatic or heteroaromatic radical which has 6 ring atoms and may contain a fused aromatic ring, it being possible for both the ring A and the fused ring to be substituted;
the ring B is an unsubstituted or substituted benzene ring;

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