[EN] PROCESS FOR THE PREPARATION OF CHLORANTRANILIPROLE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE CHLORANTRANILIPROLE
申请人:EUROFINS ADVINUS LTD
公开号:WO2021033172A1
公开(公告)日:2021-02-25
The present invention relates to two novel, efficient and one-pot methods for synthesizing chlorantraniliprole. In the first scheme, Chlorantraniliprole is prepared by a novel telescopic process starting from 3-Bromo-1-(3-chloropyridin-2-yl)-1H-pyrazole-5-carboxylic acid a key raw material-A (Key RM-A). In the second scheme, starting from Key RM-A, the process steps use of a novel variant of anthranilic acid (Methyl 2-amino-5-chloro-3-methylbenzoate), to get Chlorantraniliprole. Furthermore, the present invention also relates to the synthesis of key starting material for the synthesizing chlorantraniliprole in-situ. All the in-situ steps of the disclosed synthesis methods obtain good yield, without using any expensive reagent or base or harsh reaction conditions, which makes the process simple, environment friendly and more cost effective. With this process the production cost of chlorantraniliprole and its intermediates is substantially reduced; fewer by-products are formed during its synthesis and since it's a one-pot reaction, isolation and purification are easy to achieve.
本发明涉及两种新颖、高效的一锅法合成氯氰虫脒的方法。在第一种方案中,氯氰虫脒是通过一种新颖的望远镜过程制备的,起始原料为3-溴-1-(3-氯吡啶-2-基)-1H-吡唑-5-羧酸(关键原料-A)。在第二种方案中,从关键原料-A开始,该过程使用一种新颖的变体苯甲酸(甲基2-氨基-5-氯-3-甲基苯甲酸酯)来制备氯氰虫脒。此外,本发明还涉及在原位合成氯氰虫脒的关键起始材料。所述合成方法的全部原位步骤获得良好产率,不使用任何昂贵试剂、碱或苛刻的反应条件,使得该过程简单、环保且更具成本效益。通过该过程,氯氰虫脒及其中间体的生产成本大幅降低;在其合成过程中形成的副产物较少,由于它是一锅反应,因此易于实现分离和纯化。