Pyrazoloazole series couplers

Details Pyrazoloazole series couplers Pyrazoloazole series couplers

1990-07-06

1992-06-02

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548251, C07D48704

Patent

active

051188120

ABSTRACT:
A pyrazoloazole series coupler having the following formula (I) ##STR1## wherein R.sub.1 represents a substituent having a Hammett's substituent constant .sigma..sub.p of at least 0.6;

REFERENCES:
patent: 2891862 (1959-06-01), von Allan
patent: 4873183 (1989-10-01), Tachibana et al.

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