Inventors:
Rina Carlini - Mississauga, CA
James M. Duff - Mississauga, CA
Stephen G. Robinson - Burlington, CA
George Liebermann - Mississauga, CA
Roger E. Gaynor - Oakville, CA
Tania Pereira - Mississauga, CA
Jeffrey H. Banning - Hillsboro OR
James D. Mayo - Mississauga, CA
Assignee:
Xerox Corporation - Stamford CT
International Classification:
C09B 35031
US Classification:
534649, 534757, 534DIG 2, 560 49
Abstract:
Disclosed is a process for preparing dianthranilate compounds which comprises (a) admixing reactants as follows: (1) a diol of the formula R (OH) , wherein R is an alkylene group having at least about 20 carbon atoms, and wherein the âOH groups are primary or secondary, (2) isatoic anhydride, present in an amount of at least, about 2 moles of isatoic anhydride per every one mole of diol, (3) a catalyst which is 1,4-diazabicyclo [2. 2. 2]octane, N,N,Nâ,Nâ-tetramethylethylene diamine, or a mixture thereof, said catalyst being present in an amount of at least about 0. 2 mole of catalyst per every one mole of diol, and (4) a solvent; and (b) heating the mixture thus formed to form a dianthranilate compound of the formula Also disclosed is a process for preparing diazopyridone colorants which comprises (I) preparing a dianthranilate compound by the aforementioned method, (II) reacting the dianthranilate compound with nitrosylsulfuric acid to form a diazonium salt, and (III) reacting the, diazonium salt with a pyridone compound to form a diazopyridone compound.