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

Claim 2:
3. 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 (1), a duration of the reflux reaction is 6-7 h; a mole ratio of 3-tert-butyl-5-styrylsalicylaldehyde and (1S,2S)-(−)-1,2-diphenylethylenediamine or (1S,2S)-(+)-1,2-cyclohexanediamine is 2:1-1.1; a dosage of the solvent I is 8-10 times of the mass of (1S,2S)-(−)-1,2-diphenylethylenediamine or (1S,2S)-(+)-1,2-cyclohexanediamine.