Chromenopyrazole compounds

Details Chromenopyrazole compounds Chromenopyrazole compounds

1976-01-22

1977-08-02

Friedman, Stanley J.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548359, C07D23100

Patent

active

040395570

ABSTRACT:
Thermoreactive recording material comprising at least a support, a binder, a color former and an electron accepting substance, wherein the color former is a compound of the formula ##STR1## wherein R.sub.1 and R.sub.2, independently of the other, represent hydrogen, alkyl with 1 to 12 carbon atoms, alkoxyalkyl with 2 to 8 carbon atoms, cycloalkyl with 5 or 6 carbon atoms, benzyl or phenyl,

REFERENCES:
patent: 3697540 (1972-10-01), Kemeira et al.

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