06576747 is referenced by 96 patents and cites 27 patents.

Disclosed is a process for preparing dianthranilate compounds which comprises (a) admixing reactants as follows: (1) a diol of the formula R

1

(OH)

2

, wherein R

1

is an alkylene group having at least about 20 carbon atoms, and wherein the —OH 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,N′,N′-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.

Title
Processes for preparing dianthranilate compounds and diazopyridone colorants
Application Number
10/185261
Publication Number
6576747 (B1)
Application Date
June 27, 2002
Publication Date
June 10, 2003
Inventor
James D Mayo
Mississauga
US
Jeffrey H Banning
Hillsboro
OR, US
Tania Pereira
Mississauga
US
Roger E Gaynor
Oakville
US
George Liebermann
Mississauga
US
Stephen G Robinson
Burlington
US
James M Duff
Mississauga
US
Rina Carlini
Mississauga
US
Agent
Judith L Byorick
US
Assignee
Xerox Corporation
CT, US
IPC
C09B 35/031
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