Polycyclic dyes

Details Polycyclic dyes Polycyclic dyes

1990-11-09

1993-02-02

Higel, Floyd D.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544148, 546167, 546197, 549299, C07D49304

Patent

active

051838885

ABSTRACT:
The present invention relates to a process for the preparation of certain polycyclic dyes and in particularly the preparation of a polycyclic dye of Formula I: ##STR1## By reacting a phenyltartronic acid of Formula II: ##STR2## With either a compound of Formula III: ##STR3## or a compound of Formula IV: ##STR4##

REFERENCES:
patent: 4115404 (1978-09-01), Greenhalgh et al.
patent: 4650882 (1987-03-01), Kenyon et al.
patent: 4680417 (1987-07-01), Kenyon et al.
patent: 4916240 (1990-04-01), Kenyon

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