[EN] PREPARATION OF SUBSTITUTED PYRAZOLES AND THEIR USE AS ANTHRANILAMIDES PRECURSORS<br/>[FR] PRÉPARATION DE PYRAZOLES SUBSTITUÉS ET LEUR UTILISATION EN TANT QUE PRÉCURSEURS D'ANTHRANILAMIDES
申请人:ADAMA MAKHTESHIM LTD
公开号:WO2020212991A1
公开(公告)日:2020-10-22
A method is disclosed for preparing pyrazole derivative 3-bromo- 5-methyl- 1-H- pyrazole- N-2-chloropyridine (compound of Formula I) by reacting of a compound of Formula II with halogen substituted pyridine optionally in the presence of base and organic solvent or by decarboxylation of pyrazole carboxylic acid of Formula XI in the presence of acid. In addition, provided a method of preparation of synthetic precursors of Formula II, Formula IV, Formula V, Formula VI, Formula XI, and a method of preparing a compound of Formula VII comprising reacting a compound of Formula I with an oxidant optionally in the presence of a catalyst. Also disclosed a compound of Formula I as useful synthetic precursor for preparation of anthranilamide of Formula VIII.
揭示了一种制备吡唑衍生物3-溴-5-甲基-1-H-吡唑-N-2-氯吡啶(化合物I式)的方法,通过将化合物II式与卤代吡啶反应,可选地在碱和有机溶剂的存在下,或者在酸的存在下通过吡唑羧酸的脱羧制备。此外,提供了一种制备合成前体II式、IV式、V式、VI式、XI式的方法,以及一种制备化合物VII式的方法,包括将化合物I式与氧化剂反应,可选地在催化剂的存在下。还揭示了一种化合物I式作为制备方酰胺VIII式的有用合成前体的方法。