GB519208A - Improvements in or relating to colour photography - Google Patents

Abstract

519,208. 1 - Hydroxy - 2 - napthoylanhilides. KENDALL, J. D.,' and COLLINS, R. B. Sept. 17, 1938, No. 27166. Drawings to Specification. [Class 2 (iii)] [Also in Group XX] Compound of the general formula where R is a phenyl group substituted by one chlorine atom, two chlorine atoms, one bromine atom, two bromine atoms, or one chlorine atom and one bromine atom,.and where X is hydrogen, chlorine, or bromine, are prepared by condensing a 1-hydroxy-2-naphthoylhalide (which may be unsubstituted or substituted in the 4- position by a chlorine or bromine atom) with a chloraniline, dichloraniline, bromaniline, dibromaniline, or chlorbromaniline. The compounds prepared from o- and p-chlor-and bromanilines and 2:4-dichloraniline are referred to. The Provisional Specification refers to colour formers of the general formula while R1 and R2represent either the same or different atoms or groups consisting of hydrogen atoms, alky groups such as methyl, ethyl, or propyl, aryl groups such as phenyl, aralkyl groups such as benzyl, heterocyclic groups such as thiazole, thiazoline, oxazole, oxazoline, selenazole, selenazoline, pyridine, quinoline, indolenine, diazole or diazine such as pyrimidine, thiodiazole, or quinazoline, benzthiazole, naphthathiazole, and anthrathiazole, or a single cyclic grouping such as piperidine, pyrazole, indole, or N-alkyldihydrobenzthiazole and X represents hydrogen or a halogen atom. The groups R1 and R2may be substituted by halogen atoms or amino, substituted, amino, nitro, hydroxy, alkoxy, or oxyalkyl groups. The naphthalene nucleus may be substituted in any of the 3-, 5-, 6-, 7-, or 8- positions with halogen atoms or alkyl, aryl, amino, substituted amino, nitro, hydroxy, alkoxy, carbalkoxy, or oxyalkyl groups. 1-hydroxy-2-naphthoylchloride may be condensed with ammonia, aniline, monomethylaniline, p-nitroaniline, oc- or #-naphthylamine, ethyloc-naphthylamine, o- or p-anisidine, p-aminophenol, p-amino-. benzoic acid, 2:6-dibrom-4-aminophenol, maminoacetophenone, m - aminobenzaldehyde, ethyl - p -aminobenzoate, 1 - amino - 5 -ethoxybenzthiazole, 1-iminodihydrobenzthiazole, or 2-imino-1-methyl-dihydroquinoline.