The present invention is 3,4-disubstituted-benzo[b]thiophene derivatives represented by general formula (I) and processes for preparing compounds represented by general formula (V) from compounds represented by general formula (IV), preparing a mixture of compounds represented by the following formula (II) and the following formula (III) and preparing the benzo[b]thiophene derivatives represented by the above formula (I).
wherein, R1 and R2 represent each a halogen atom, a trihalomethyl group, a C1-4 alkyl group or a C1-4 alkoxy group; X represents a hydroxy group or a halogen atom; R3 and R4 represent each a hydrogen or a halogen atom, a trihalomethyl group, a C1-4 alkyl group or a C1-4 alkoxy group; and R5 represents a C1-3 alkyl group or a trifluoromethyl group.
本发明是通式(I)代表的3,4-二取代-苯并[b]
噻吩衍
生物,以及从通式(IV)代表的化合物制备通式(V)代表的化合物、制备下式(II)和下式(III)代表的化合物混合物和制备上式(I)代表的苯并[b]
噻吩衍
生物的工艺。
其中,R1 和 R2 分别代表卤原子、三卤甲基、C1-4 烷基或 C1-4 烷氧基;X 代表羟基或卤原子;R3 和 R4 分别代表氢或卤原子、三卤甲基、C1-4 烷基或 C1-4 烷氧基;R5 代表 C1-3 烷基或三
氟甲基。