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

Claim 5:
6. The preparation method for the high optical indoxacarb intermediate (2S)-5-chloro-2,3-dihydro-2-hydroxy-1-oxo-1H-indene-2-carboxylic acid methyl ester according to claim 1, wherein in step (3), a volume ratio of ethanol to water in the solvent III is 3:1; a dosage of the solvent III is 6-10 times of the weight of the ligand monomer of Catalyst A or Catalyst B, and a dosage of AIBN is 0.5%˜2% of the weight of the ligand monomer of Catalyst A or Catalyst B.