Patent ID: 11884639
Assignee: SHANDONG JINGBO AGROCHEMICALS TECHNOLOGY CO., LTD.
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 1:
2. The preparation method for the high optical indoxacarb intermediate according to claim 1, comprising the steps of:
adding 5-chloro-2-methoxycarbonyl-1-indanone ester in toluene solution into the toluene system of catalyst A or catalyst B obtained by the above method, dripping an oxidant at 50-80° C. to carry out asymmetric synthesis reaction, after the reaction is finished, cooling it to 60-65° C.; Catalyst A or Catalyst B is recovered by hot filtration, after the filtrate is concentrated, cooled and filtered, the high optical indoxacarb intermediate (2S)-5-chloro-2,3-dihydro-2-hydroxy-1-oxo-1H-indene-2-carboxylic acid methyl ester is obtained; at the same time, the recovered Catalyst A or Catalyst B is put into toluene solvent to form a suspension, which can continue to participate in the above asymmetric synthesis reaction.