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

Claim 3:
4. 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 (2), the reducing agent is sodium borohydride or sodium cyanoborohydride or potassium borohydride or lithium aluminum hydride; a mole ratio of the reducing agent and the condensate is 2-4:1; a dosage of the solvent II is 4-8 times of the mass of the condensate.