A process for producing a dicarboxylic acid compound represented by the formula (4):
wherein R
1
and R
2
are the same or different and each represents lower alkyl and the wavy line indicates that this compound is the E- or Z-isomer or a mixture of them, characterized by reacting a compound represented by the formula (2):
wherein R
1
, R
2
and the wavy line have the same meanings as the above, and one of X
2
and X
3
represents hydrogen and the other represents halogen, with nitrophenol represented by the formula (3):
in the presence of a base; a process for producing a nitrochromone compound represented by the formula (5):
wherein R
1
has the same meaning as the above, characterized by reacting the dicarboxylic acid compound or carboxylic acid thereof with an acid; a process for producing an aminochromone compound which comprises reducing the nitrochromone compound; and a process for producing an amidochromone compound which comprises acylating the aminochromone compound are provided.
提供一种制备式(4)的二
羧酸化合物的方法,其中R1和R2相同或不同,每个代表低级烷基,波浪线表示该化合物是E或Z异构体或它们的混合物,其特征在于将式(2)的化合物与硝基
酚在碱的存在下反应,式中R1、R2和波浪线的含义与上述相同,X2和X3中的一个代表氢,另一个代表卤素;提供一种制备式(5)的硝基
香豆素化合物的方法,其中R1的含义与上述相同,其特征在于将二
羧酸化合物或其
羧酸与酸反应;提供一种制备
氨基
香豆素化合物的方法,其包括还原硝基
香豆素化合物;以及提供一种制备酰胺
香豆素化合物的方法,其包括酰化
氨基
香豆素化合物。