Chromogenic derivatives of bis-1,1-disubstituted ethylene and a

Details Chromogenic derivatives of bis-1,1-disubstituted ethylene and a Chromogenic derivatives of bis-1,1-disubstituted ethylene and a

1975-04-10

1977-07-12

Gerstl, Robert

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260295F, 2603432R, C07D40704, C07D40304

Patent

active

040353931

ABSTRACT:
A process for preparing a chromogenic compound of normally colorless form is disclosed; -- the chromogenic compound having the following structural formula: ##STR1## R can be, among several others, hydrogen, alkyl, alkoxy, aryl, and heterocyclic, substituted and unsubstituted; and E can be a broad family of aromatic and heterocyclic structures. The compound is eligible for use in pressure-sensitive record materials and manifold marking systems.

REFERENCES:
patent: 3766214 (1973-10-01), Lin et al.
Elderfield, Heterocyclic Compounds, vol. 2, p. 296 (1951).

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