06696552 is referenced by 92 patents and cites 29 patents.

A process which comprises admixing in the absence of a solvent an amine of the formula R

1

—NH

2

and a first ester of the formula

wherein R

2

is an electron withdrawing group and R

3

is an alkyl group; heating the mixture containing the amine and the first ester to form an intermediate compound of the formula

admixing the intermediate compound with a base and a second ester of the formula

said second ester being present in a molar excess relative to the intermediate compound, said base being present in a molar excess relative to the intermediate compound, and heating the mixture to form a pyridone compound of the formula

or a salt thereof. Also disclosed is a process for preparing diazopyridone colorants which comprises preparing a pyridone compound by the above process and reacting the pyridone compound with a diazonium salt to form a diazopyridone compound.

Title
Process for preparing substituted pyridone compounds
Application Number
10/185597
Publication Number
6696552 (B2)
Application Date
June 27, 2002
Publication Date
February 24, 2004
Inventor
George Liebermann
Mississauga
US
Roger E Gaynor
Oakville
US
Rina Carlini
Mississauga
US
James M Duff
Mississauga
US
James D Mayo
Mississauga
US
Agent
Judith L Byorick
US
Assignee
Xerox Corporation
CT, US
IPC
C09B 41/00
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