Preparation of polycyclic dyes

Details Preparation of polycyclic dyes Preparation of polycyclic dyes

1993-05-07

1994-04-19

Ivy, C. Warren

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544164, 546300, 560 20, 564434, C07D30777

Patent

active

053046595

ABSTRACT:
A process for the preparation of a polycyclic dye of Formula (1): ##STR1## by reacting a compound of Formula (2): ##STR2## with a benzofuranone of the Formula (3): ##STR3## wherein: Ring A is unsubstituted or is substituted by from one to three groups;

REFERENCES:
patent: 5214161 (1993-05-01), Milner
Research Disclosure, No. 343, 10 Nov. 1992, Emsworth(G) `Di:oxo-di:hydro:benzo-di:furan poly:cyclic dye`.

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