This invention relates to derivatives of 3-methylflavone-8-carboxylic acid represented by the formula (1)
wherein R represents a hydrogen atom, a lower alkyl group or a group
(wherein R' and R2 represent a lower alkyl group or R' and R2, when taken together with the nitrogen atom to which they are attached, may form a heterocyclic ring with or without an intervening hetero atom, and n is an integer of 1 to 4.), and X represents a halogen atom.
This invention also relates to processes for preparing the same.
本发明涉及由式(1)表示的
3-甲基黄酮-8-羧酸的衍
生物
其中 R 代表氢原子、低级烷基或基团
(其中R'和R2代表低级烷基或R'和R2与它们所连接的氮原子一起可形成一个杂环,中间有或没有杂原子,n是1至4的整数),X代表卤素原子。
本发明还涉及制备上述物质的工艺。