The present invention lies in a process for producing a compound represented by the following formula [IV], which comprises the following steps (1) to (3), as well as in an intermediate therefor.
(1) A step which comprises reacting a compound represented by the following formula [I] with a compound represented by the following formula [VI] or with a mixture of a compound represented by the following formula [VII] and a compound represented by the following formula [VIII] to obtain a compound represented by the following formula [IX], and hydrolyzing the compound represented by the formula [IX] under acidic conditions to obtain a compound represented by the following formula [II].
(2) A step which comprises reacting the compound represented by the formula [II] with hydroxylamine to obtain a compound represented by the following formula [III].
(3) A step which comprises dehydrating the compound represented by the formula [III] to obtain a compound represented by the formula [IV].
本发明涉及一种生产下式[IV]所代表的化合物的工艺,该工艺包括以下步骤(1)至(3)以及一种中间体。
(1)步骤包括将下式[I]代表的化合物与下式[VI]代表的化合物或与下式[VII]代表的化合物和下式[VIII]代表的化合物的混合物反应,得到下式[IX]代表的化合物,并在酸性条件下
水解下式[IX]代表的化合物,得到下式[II]代表的化合物。
(2) 包括使式[II]代表的化合物与
羟胺反应以得到下式[III]代表的化合物的步骤。
(3) 将式[III]代表的化合物脱
水,得到式[IV]代表的化合物。