申请人:Ihara Chemical Industry Co., Ltd.
公开号:US05739329A1
公开(公告)日:1998-04-14
The present invention provides a process for producing a hexahydropyridazine-1,2-dicarboxy derivative represented by the general formula: ##STR1## wherein R.sup.1 and R.sup.2 represent each independently an alkyl group, by reacting a hydrazinedicarboxy derivative represented by the general formula: R.sup.1 OOC--NH--NH--COOR.sup.2 (1) wherein R.sup.1 and R.sup.2 have the same meaning as mentioned above, with a dihalogenobutane represented by the general formula: X.sup.1 --CH.sub. CH.sub.2 CH.sub.2 CH.sub.2 --X.sup.2 (2) wherein X.sup.1 and X.sup.2 represent each independently a halogen atom, in the presence of an alkali metal hydroxide, characterized in that the above reaction is effected in an aprotic polar solvent, and a process for producing a hexahydropyridazine, characterized by decarboxylating the thus obtained hexahydropyridazine-1,2-dicarboxy derivative (3) without isolation in the presence of an alkali metal hydroxide and a hydrogen-denoting compound.
本发明提供了一种生产由通式代表的六氢吡啶-1,2-二羧酸衍生物的方法:其中R^1和R^2分别独立地代表烷基基团,通过将由通式代表的双羧基肼衍生物与由通式代表的二卤丁烷在碱金属氢氧化物存在下反应,其中R^1和R^2的含义与上述相同,其中X^1和X^2分别独立地代表卤素原子,其特征在于上述反应在无极性极性溶剂中进行,并且通过在碱金属氢氧化物和表示氢的化合物存在下,在不分离的情况下脱羧化所得的六氢吡啶-1,2-二羧酸衍生物。