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Quinaldine derivative

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专利汇可以提供Quinaldine derivative专利检索,专利查询,专利分析的服务。并且NEW MATERIAL:A quinaldine derivative of formula I (R
1 is H, lower alkyl; R
2 is lower alkyl or substituted phenyl when R
1 is H; and H, lower alkyl, or substituted phenyl when R
1 is lower alkyl; R
3 is nitro, amino; R
4 is halogen, lower alkyl, lower alkoxy).
EXAMPLE: 4-Ethyl-8-methyl-5-nitro-quinaldine.
USE: An intermediate for organic syntheses; especially, intermediate of an organic pigment having excellent heat stability, light-fastness, and migration resistance.
PROCESS: The compound I is prepared, e.g. by (1) reacting an aniline derivative II with a β-oxyketone derivative having a substitution group in the presence of an acid catalyst, such as HCl, (2) neutralizing the reaction mixture, (3) separating and purifying the produced substituted quinaldine derivative, e.g. 8-chloro-4-ethyl- quianldine, and (4) nitrifying the 5-position of the derivative with mixed acid.
COPYRIGHT: (C)1979,JPO&Japio,下面是Quinaldine derivative专利的具体信息内容。

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