Derivatives of p-Hydroxyaniline and the use thereof in Colour-Forming Developing Compositions
Реферат: 1,193,386. Derivatives of p-aminophenol. FUJI SHASHIN FILM K.K. 9 July, 1968 [29 July, 1967], No. 32691/68. Heading C2C. [Also in Division G2] The invention comprises compounds of the formula wherein X represents the atoms required to complete a 5- or 6-membered heterocyclic ring, which may be methyl-substituted, and comprises a combination of -CH 2 - and -O- components, there being 1, 2, or 3 -CH 2 - and 1 or 2 -O- components in said ring, and the acid addition salts of such compounds. The compounds are prepared by condensing paminophenol with a formyl-substituted benzheterocycle and reducing the resulting Schiff's base, e.g. with NaBH 4 or Zn dust and NaOH. Specified compounds include derivatives of coumaran, isocoumaran, chroman, isochroman, 1,4 - benzodioxane and 1,3 - benzodioxolane. The compounds are used as developers in colour photographic processes (see Division G2).
Intermediates and the preparation and use thereof
Номер патента: US3674782A. Автор: John D Mee,Carl H Eldredge. Владелец: Eastman Kodak Co. Дата публикации: 1972-07-04.