Patent GB-681915-A (GB)
Title: Improvements in or relating to the production of colour photographic images
Inventor: JENNEN JACOB J
IPC: G03C7/384
Filed: 1949-12-31
Abstract: <FORM:0681915/IV (b)/1> 1 - Phenyl - 3 - (N - methylbenzthiazolylidene - 21 - amino - 5 - pyrazolone is prepared by reacting 1 - phenyl - 3 - (benzthiazolyl - 21) - amino-5-pyrazolone with dimethyl sulphate in presence of aqueous NaOH. 3-(11-phenyl-51-pyrazolonyl - 31) - methylamino - 1 - phenyl - 5 - pyrazolone - 411 - sodium sulphonate, a  - 3 - (N - methylbenzoxazolylidene - 2) - amino - 5 - pyrazolonyl - (1) - oenanthic acid, and methylamino - 3 : 31 - bis - 1 - benzthiazolyl - (2) - 5 - pyrazolone are similarly prepared.  1 - Phenyl - 3 - (N - phenylthiazolinylidene - 21)-amino-5-pyrazolone is prepared by boiling together 1 - phenyl - 3 - phenylthiocarbamyl-amino-5-pyrazolone and ethylene dibromide.  1 - Phenyl - 3 - (N - phenylthiazolonylidene - 21) - amino - 5 - pyrazolone and 1 - (m - chlorophenyl)-3 - (N - phenylthiazolonylidene - 21) - amino - 5 - pyrazolone are similarly prepared using monochloracetic acid.  1 - Phenyl - 3 - (N - 6 - methylbenzthiazolyl - acetamido) - 5 - pyrazolone is prepared by boiling together 1 - phenyl - 3 - (6 - methylbenzthiazolylamino)-5-pyrazolone and acetic anhydride.  1 - Phenyl - 3 - (6 - methylbenzthiazolylamino) - 5 - pyrazolone is prepared by refluxing together 1-phenyl-3-amino-5-pyrazolone, p - tolyl isothiocyanate, and pyridine, and adding a chloroform solution of bromine to the product. 1 - m - Chlorophenyl - 3 - phenylthiocarbamyl-amino-5-pyrazolone is prepared by boiling together 1 - m - chlorophenyl - 3 - amino - 5 - pyrazolone, phenyl isothiocyanate, and pyridine.  1 - Phenyl - 3 - (1 : 8 - trimethylene - 2 - keto - 2 : 3 - dihydroquinolylidene - 4) - amino - 5 - pyrazolone is prepared by melting together 1 - phenyl - 3 - amino - 5 - pyrazolone and 7-chloro-5-oxo-julolin in presence of HCl.  The compound of Fig. 10 is prepared by heating together ammonium 1-p-sulphophenyl-3 - (21 - chloro - 41 - quinazolyl) - amino - 5 - pyrazolone and 1 : 5-dibromopentane.  3 - (11 - phenyl - 51 - pyrazolonyl - 31) - amino-1 - phenyl - 5 - pyrazolone - 411 - sulphonic acid is prepared by heating bis-(1-phenyl-5-pyrazolonyl-3)-amine with chlorosulphuric acid in sulphuric acid.  3 - Di - 21 - pyridyl - amino - 1 - phenyl - 5 - pyrazolone is prepared by boiling together 1 - phenyl - 3 - amino - 5 - pyrazolone and 2-chloropyridine in glacial acetic acid.  a  - (3 - Amino - 5 - pyrazolonyl - 1) - oenanthic acid is prepared by heating together ethyl b -amino : b -ethoxyacrylate and a -hydrazinooenanthic acid.  a  - 3 - (Benzoxazolylidene - 2) - amino - 5 - pyrazolonyl-1-oenanthic acid is prepared by melting together a -(3-amino-5-pyrazolonyl-1)-oenanthic acid and 2-chlorobenzoxazole. 1-Benzthiazolyl - (2) - 3 - N - phenyl : N - benzthiazolyl - (2) - 5 - pyrazolone is similarly prepared.  1 - Phenyl - 3 - (3 - benzthiazolylbenzthiazolylidene) - amino - 5 - pyrazolone is prepared by melting together 1 - phenyl - 3 - (benzthiazolylidene - 2) - amino - 5 - pyrazolone and 2-aminobenzthiazole.  1 - Phenyl - 3 - (3 : 4 - diphenylthiazolylidene) - amino - 5 - pyrazolone is prepared by boiling together 1 - phenyl - 3 - phenylthiocarbamyl-amino-5-pyrazolone and o -bromoacetophenone in ethanol.  Disodium 1 - phenyl - 3 - (3 : 4 - diphenylthiazolylidene) - amino - 4 - (2 : 4 - disulphobenzylidene) - 5 - pyrazolone is prepared by heating together 1 - phenyl - 3 - (3 : 4 p  - diphenylthiazolylidene) - amino - 5 - pyrazolone, disodium benzaldehyde-2 : 4-disulphonic acid, water, and NaOH.  Specifications 578,014 and 605,724 are referred to.