Patent GB-701843-A (GB)
Title: High speed colour photographic silver dye bleachout taking and printing film
IPC: G03C7/28
Filed: 1951-04-13
Abstract: 2 - Amino - 4 : 6 - dihydroxy - 5 - nitrosopyrimidine is prepared by refluxing together ethyl isonitrosomalonate, guanidine carbonate, sodium ethoxide, and ethyl alcohol.  2-Cyanoamino - 4 : 6 - dihydroxy - 5 - nitrosopyrimidine (using dicyandiamide and ethyl isonitrosomalonate), 2 - decylamino - 4 : 6 - dihydroxypyrimidine (using ethyl malonate and decyl guanidine carbonate), and 2-dodecylamino - 4 : 6 - dihydroxypyrimidine (using ethyl malonate and dodecylguanidine) are similarly prepared.  2 - Decylamino - 4 : 6 - dihydroxy - 5 - nitrosopyrimidine is prepared by adding aqueous sodium nitrite to an alcoholic solution of 2 - decylamino - 4 : 6 - dihydroxypyrimidine containing aqueous sodium hydroxide, and acidifying, and repeating the nitrosation process twice.  2 - Dodecylamino - 4 : 6 - dihydroxy - 5 - nitrosopyrimidine, 2 - (21 - tetradecoxy - 51 - sulphoanilino) - 4 : 6 - dihydroxy - 5 - nitrosopyrimidine, 2 - dibutylamino - 4 : 6 - dihydroxy - 5 - nitrosopyrimidine, 2 - dioctylamino - 4 : 6 - dihydroxy-5-nitrosopyrimidine, 5 : 7-dihydroxy-6 : nitroso - 1 : 3 : 4 - triazaindolizine, 5 - amino-7 - hydroxy - 6 - nitroso - 1 : 3 : 4 - triazaindolizine and 5 : 7 - dihydroxy - 6 - nitroso - 2 - phenyl-1 : 3 : 4-triazaindolizine are similarly prepared.  2 - Carboxymethylamino - 4 : 6 - dihydroxy - 5-nitrosopyrimidine is prepared by refluxing together ethyl isonitrosomalonate, guanidino-acetic acid, amyl alcohol, and sodium methoxide.  2 - Tetradecoxyphenylguanidine - 5 - sulphonic acid is prepared by refluxing together 4-tetradecoxymetanilic acid, cyanamide, and n-butyl alcohol.  2 - (21 - Tetradecoxy - 51 - sulphoanilino) - 4 : 6 - dihydroxypyrimidine is prepared by refluxing together ethyl malonate, 2-tetradecoxyphenyl guanidine-5-sulphonic acid, sodium n-butoxido, and n-butyl alcohol.  2-Dibutylamino-4 : 6-dihydroxypyrimidine and 2 - dioctylamino - 4 : 6 - dihydroxypyrimidine are similar prepared.  4 : 6 - Dihydroxy - 2 - phenylsulphonamido - 5-nitrosopyrimidine is prepared by refluxing together ethyl isonitrosomalonate, benzene-sulphonylguanidine, sodium ethoxide, and ethyl alcohol.  4 : 6 - Dihydroxy - 2 - ethylsulphonamido - 5 - nitrosopyrimidine, 2 - (41 - aminophenylsulphonamido) - 4 : 6 - dihydroxy - 5 - nitrosopyrimidine, 1 - phenyl - 2 - phenylimino - 5 - isonitrosohexahydropyrimidine - dione - 4 : 6, and 2 - cyanimino - 1 - phenyl - 5 - isonitrosohexahydropyrimidine - dione - 4 : 6 are similarly prepared. 6 - Amino - 2 - cyanamino - 4 - hydroxy - 5 - nitrosopyrimidine is prepared by refluxing together ethyl isonitrosocyanacetate, dicyandiamide, sodium ethoxide, and ethyl alcohol.  6 - Amino - 2 - (4 - aminophenylsulphonamido) - 4 - hydroxy - 5 - nitrosopyrimidine is similarly prepared.  N-Octadecyltaurine is prepared by heating together octadecylamine and sodium 2-bromoethanesulphonate, dissolving in aqueous sodium hydroxide solution and then acidifying. N-Guanyl : N-octadecyltaurine is prepared by adding a butyl alcohol solution of cyanamide dropwise to a butyl alcohol solution of N-octadecyltaurine.  Ethyl isonitrosocyanacetate is prepared by adding ethyl cyanacetate and then glacial acetic acid to a cooled aqueous solution of sodium nitrite.  Ethyl isonitrosomalonate is similarly prepared.  N - (4 - Hydroxy - 5 - nitroso - 6 - amino - 2 - pyrimidyl) : N-octadecyltaurine is prepared by refluxing together N-guanyl : N-octadecyltaurine, ethyl isonitoosocyanacetate, and sodium ethoxide.  N - (4 : 6 - Dihydroxy - 2 - pyrimidyl) : N - octadecyltaurine is prepared by refluxing together N-guanyl : N-octadecyltaurine, diethyl malonate, sodium ethoxide, and ethyl alcohol.  N - (4 : 6 - Dihydroxy - 5 - nitroso - 2 -pyrimidyl) : N-octadecyltaurine is prepared by adding aqueous sodium nitrite solution to acidified N - (4 : 6 - dihydroxy - 2 - pyrimidyl) : N - octadecyltaurine.  1 - (3 - Stearamide) - phenyl - 5 - pyrazolone - 3-carboxylic acid is prepared by adding stearyl chloride to a dimethylformamide solution of 1 - (3 - amino) - phenyl - 5 - pyrazolone - 3 - carboxylic acid and pyridine, and pouring into aqueous HCl solution.  8-(3-Stearamidobenzamido) - 1 - naphthol - 3 : 6 - disulphonic acid is similarly prepared.  5 : 7 - Dihydroxy - 2 - phenyl - 1 : 3 : 4 - triazaindolizine is prepared by refluxing together 3-amino-5-phenyl-1 : 2 : 4-triazole and diethyl malonate in the presence of sodium ethoxide.  Specifications 619,557, 636,222, [Group XX], and 663,005 are referred to.