Method for the preparation of substituted 1,4-dihydro-4-oxo-cinnoline-3-carboxylic acid, esters and salts thereof, and intermediates used in their preparation
申请人:HYBRINOVA
公开号:EP0519140A1
公开(公告)日:1992-12-23
A method for the preparation of compounds of the formula
wherein X represents a group of the formula OR₁ or NR₁R₂, wherein R₁ and R₂ independently represent H or an organic group that forms a stable covalent bond with the N or O of said X; Y is H or an organic group that forms a stable ester with the adjacent COO group; R is an alkyl or aryl group optionally substituted with one or more stable organic substituents; each R₃ independently represents a stable organic group; and n is an integer from 0 to 3;
the method using new intermediates of the formula
wherein R₃ and Y have the foregoing meanings;
W is either F or Cl;
and R₉ is a hydrocarbon such as a C₁-C₄ alkyl or alkenyl group.
一种制备式化合物的方法
其中 X 代表式 OR₁ 或 NR₁R₂ 的基团,其中 R₁ 和 R₂ 独立地代表 H 或与所述 X 的 N 或 O 形成稳定共价键的有机基团;Y 是 H 或与相邻 COO 基团形成稳定酯的有机基团; R 是可选地被一个或多个稳定有机取代基取代的烷基或芳基;每个 R₃ 独立地代表一个稳定有机基团;以及 n 是 0 至 3 的整数;
使用式中新中间体的方法
其中 R₃ 和 Y 具有上述含义;
W 是 F 或 Cl
和 R𠢙 是烃,如 C₁-C₄ 烷基或烯基。
Method for the preparation of substituted 1,4-dihydro-4-oxo-cinnoline-3-carboxylic acids, esters and salts thereof, and intermediates used in this method