The invention relates to a process for the production of compounds of formula (I), comprising Step A of reacting compounds of formula (II) with 2,3-dihalopropionitrile or 2-haloacrylonitrile in the presence of DIPEA. It also relates to a process for the production of compounds of formula (III), comprising Step B of reacting compounds of formula (I) with Br2 in the presence of DIPEA. It also relates to a process C for the production of compounds of formula (IV), comprising Step C of reacting compounds of formula (III) with di(C1-C4-alkoxy)methane and either POCl3, or a mixture comprising POCl3 and DMF, in the presence of DIPEA. It also relates to the use of DIPEA as a base in the production of compounds of formula (I), compounds of formula (III) or compounds of formula (IV).
本发明涉及一种制备公式(I)化合物的方法,包括步骤A,将公式(II)的化合物与2,3-二卤
丙腈或2-卤代
丙烯腈在DI
PEA存在下反应。它还涉及一种制备公式(III)化合物的方法,包括步骤B,将公式(I)的化合物与Br2在DI
PEA存在下反应。它还涉及一种制备公式(IV)化合物的C过程,包括步骤C,将公式(III)的化合物与二(C1-C4-烷氧基)
甲烷以及POCl3,或包含POCl3和
DMF的混合物,在DI
PEA存在下反应。它还涉及在制备公式(I)化合物、公式(III)化合物或公式(IV)化合物时,将DI
PEA用作碱的使用方法。