申请人:Xerox Corporation
公开号:US20040006234A1
公开(公告)日:2004-01-08
Disclosed is a process for preparing substituted pyridone compounds which comprises (a) admixing in the absence of a solvent (1) an amine of the formula R
1
—NH
2
wherein R
1
is an alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group, and (2) a first ester of the formula
1
wherein R
2
is an electron withdrawing group and R
3
is an alkyl group; (b) heating the mixture containing the amine and the first ester to form an intermediate compound of the formula
2
(c) admixing the intermediate compound with (1) a base and (2) a second ester of the formula
3
wherein R
4
is an alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group and R
5
is an alkyl group, 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 (d) heating the mixture containing the intermediate compound, the second ester, and the base to form a pyridone compound of the formula
4
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.
揭示了一种制备取代吡啶酮化合物的过程,包括(a)在无溶剂的情况下混合(1)具有R1—NH2式的胺,其中R1是烷基、芳基、芳基烷基或烷基芳基,以及(2)具有R2为电子吸引基团和R3为烷基的第一酯的混合;(b)加热含有胺和第一酯的混合物以形成具有式2的中间化合物;(c)将中间化合物与(1)碱和(2)具有R4为烷基、芳基、芳基烷基或烷基芳基以及R5为烷基的第二酯混合,其中所述第二酯相对于中间化合物存在摩尔过量,所述碱相对于中间化合物存在摩尔过量,并且(d)加热含有中间化合物、第二酯和碱的混合物以形成具有式4的吡啶酮化合物或其盐。还揭示了一种制备重氮吡啶酮染料的过程,包括通过上述过程制备吡啶酮化合物,并将吡啶酮化合物与重氮盐反应以形成重氮吡啶酮化合物。