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US 3,944,556 AGranted
Spiro-pyrazoline derivatives and method for the production thereof
AssigneeFuji Photo Film Co., Ltd.
InventorsHarumi Katsuyama, Hisatake Ono
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Abstract
Spiro-pyrazoline derivatives of the general formula ##SPC1## Where Z.sub.1, Z.sub.2, R.sub.1 to R.sub.4 are as defined hereinafter and methods for their preparation are disclosed. The compounds are useful as organic photoconductors, organic fluorescent materials and as additives for silver salt and non-silver salt photographic materials.
Claims4
A spiro-pyrazoline compound having the formula (I) ##SPC9##
- wherein Z.sub.1 represents --CH=CH--.sub.n in which n is 0 or 1;
- Z.sub.2 is --CH=CH--.sub.1.sub.-n ;
- R.sub.1 represents hydrogen, halogen, nitro, lower alkyl having from 1 to 3 carbon atoms, lower alkoxyl of from 1 to 3 carbon atoms or lower alkoxycarbonyl wherein the alkoxy group has from 1 to 3 carbon atoms;
- R.sub.2 represents lower alkyl having from 1 to 3 carbon atoms;
- and R.sub.3 and R.sub.4 each represents hydrogen, halogen, or nitro.
2 more elements
Dependencies are inferred from the claim text.