申请人:Nakazawa Koichi
公开号:US20090247748A1
公开(公告)日:2009-10-01
A process for producing a sulfonyl chloride compound comprising:
(A) a step comprising reacting a pyridazine compound represented by the formula (1):
wherein R
1
represents a hydrogen atom, a halogen atom, an alkyl group which may be substituted with a halogen atom or atoms, or the like, R
2
and R
3
are the same or different and each represents a hydrogen atom or the like, R
4
represent a hydrogen atom, a halogen atom, an alkyl group which may be substituted with a halogen atom or atoms, or the like,
with a sulfonating agent;
(B) a step comprising contacting the reaction mixture obtained in the step (A) with a chlorinating agent; and
(C) a step comprising mixing the reaction mixture obtained in the step (B) with an aqueous inorganic base solution to separate an organic layer containing a sulfonyl chloride compound represented by the formula (2):
wherein R
1
to R
4
are the same meanings as defined above.
一种生产磺酰氯化合物的方法,包括以下步骤:
(A)反应式(1)所表示的吡嗪化合物,其中R1表示氢原子、卤原子、可以用卤原子或其他基团取代的烷基基团等,R2和R3相同或不同,分别表示氢原子或类似物,R4表示氢原子、卤原子、可以用卤原子或其他基团取代的烷基基团等,与磺化试剂反应;
(B)将步骤(A)中得到的反应混合物与氯化试剂接触;
(C)将步骤(B)中得到的反应混合物与无机碱性水溶液混合,以分离出含有式(2)所表示的磺酰氯化合物的有机层,其中R1到R4的含义如上所定义。