2-,6-diphenylpyridine compounds useful as dye precursors

Details 2-,6-diphenylpyridine compounds useful as dye precursors 2-,6-diphenylpyridine compounds useful as dye precursors

1989-01-17

1990-03-13

Lee, Mary C.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544360, 546194, 546272, 546275, 546329, 546330, C07D40102, C07D21338

Patent

active

049084470

ABSTRACT:
Pyridine compounds of the general formula ##STR1## where one radical X is phenyl and the other radical X is phenyl which is substituted by halogen, cyano, C.sub.1 -C.sub.5 -alkyl, C.sub.1 -C.sub.5 -alkoxy or C.sub.1 -C.sub.5 -alkoxycarbonyl, or both radicals X are 4-fluorophenyl, and X.sup.1 is a radical of the formula ##STR2## where R.sup.1 and R.sup.2 independently of one another are each straight-chain or branched alkyl, cyanoalkyl, haloalkyl, aryl or aralkyl having a total of 7 to 14 carbon atoms, or ##STR3## is a 5-membered or 6-membered saturated heterocyclic radical and R.sup.3 is straight-chain or branched C.sub.1 -C.sub.4 -alkyl, are described.
The compounds (I) are dye precursors for pressure-sensitive recording systems.

REFERENCES:
patent: 4262078 (1981-04-01), Ishida et al.
patent: 4363503 (1982-12-01), Schmidt et al.

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