PREPARATION OF POLYCYCLIC DYES

A process for the preparation of a polycyclic dye of the Formula (1): by reacting a ketal ester of the Formula (2): with a benzofuranone of the Formula (3): wherein: Ring A is unsubstituted or is substituted by from one to three groups; Ring B is unsubstituted, apart from the nitro group, or is subs...

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Bibliographic Details
Main Author MILNER; DAVID J
Format Patent
LanguageEnglish
Published 25.05.1993
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
ADHESIVES
CHEMISTRY
DYES
HETEROCYCLIC COMPOUNDS
LAKES
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MORDANTS
NATURAL RESINS
ORGANIC CHEMISTRY
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
PAINTS
POLISHES
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Summary:A process for the preparation of a polycyclic dye of the Formula (1): by reacting a ketal ester of the Formula (2): with a benzofuranone of the Formula (3): wherein: Ring A is unsubstituted or is substituted by from one to three groups; Ring B is unsubstituted, apart from the nitro group, or is substituted by one or two additional groups; each R is independently alkyl. The polycyclic dyes described are useful for the coloration of synthetic textile materials especially polyesters.
Bibliography:Application Number: US19920898833