申请人:SUMITOMO CHEMICAL COMPANY LIMITED
公开号:EP0711762A1
公开(公告)日:1996-05-15
There are disclosed an industrially favorable process for producing a tetrazole compound of general formula (1):
characterized in that a nitrile of general formula (2):
R¹CN (2)
is reacted with hydrazine or a salt thereof in the presence of a catalyst, followed by reaction with a nitrous acid compound of general formula (3):
ANO₂ (3)
or a nitrile of general formula (2) is reacted with hydrogen sulfide, followed by reaction with an alkyl halide of general formula (4):
R⁴J (4)
with hydrazine or a salt thereof, and then with a nitrous acid compound of general formula (3); and an intermediate of general formula (5):
R¹C(=R⁵)R⁶ (5)
which is useful for the production of the tetrazole compound (in which R¹ to R⁶, A and J in the above formulas are as defined in the specification).
本发明公开了一种生产通式(1)四唑化合物的工业化生产工艺:
其特征在于,通式(2)的腈:
R¹CN (2)
在催化剂存在下与肼或其盐反应,然后与通式(3)的亚硝酸化合物反应:
ANO₂ (3)
或通式(2)的腈与硫化氢反应,然后与通式(4)的烷基卤化物反应:
R⁴J (4)
与肼或其盐反应,然后与通式(3)的亚硝酸化合物反应;以及通式(5)的中间体:
R¹C(=R⁵)R⁶ (5)
其中上述式中的 R¹ 至 R⁶、A 和 J 如说明书中所定义)。