Phenylmercaptotetrazolo- and nitroindazolo masked development/im

Details Phenylmercaptotetrazolo- and nitroindazolo masked development/im Phenylmercaptotetrazolo- and nitroindazolo masked development/im

1981-08-06

1985-02-26

Hollrah, Glennon H.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548371, C07D25702, C07D23154

Patent

active

045018960

ABSTRACT:
Novel nitrobenzyl compounds are incorporated into a photographic emulsion or developer for controlled release of development/image modifier compounds. This occurs imagewise only after developer oxidation products have been formed in the course of the development process. For example, nitrobenzyl-masked phenylmercaptotetrazole (PMT), incorporated into a silver halide emulsion, reacts with developer oxidation products via an electron transfer mechanism to release the potent development restrainer PMT.

REFERENCES:
patent: 3993661 (1976-11-01), Grashoff
patent: 4187110 (1980-02-01), Yagihara et al.

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