申请人:SUGAI CHEMICAL INDUSTRY CO., LTD.
公开号:EP0274379A2
公开(公告)日:1988-07-13
A process for preparing pyridine-2,3-dicarboxylic acid compounds of the following formula:
wherein R¹ and R³ are, identical or different, each a hydrogen atom or a lower alkyl group, R² is a hydrogen atom, a lower alkyl group, or a phenyl-(lower)alkyl group which may have halogen atom or lower alkyl group on its phenyl ring, and R⁴ and R⁵ are, identical or different, each a lower alkoxy group.
The compounds are useful as an intermediate for preparing agricultural chemicals and pharmaceuticals.
一种制备下式吡啶-2,3-二羧酸化合物的工艺:其中 R¹ 和 R³ 相同或不同,各为氢原子或低级烷基;R² 为氢原子、低级烷基或苯基(低级)烷基,其苯基环上可能含有卤素原子或低级烷基;R⁴ 和 R⁵ 相同或不同,各为低级烷氧基。 该化合物可用作制备农药和药物的中间体。