Ethylene → Methyl 2-chloro-(4,5-dihydroisoxazol-3-yl)-4-methylsulfonylbenzoate

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Reaction Steps

At 15-20° C., ethylene is introduced into a solution of 158.0 g (0.54 mol) of methyl 2-chloro-3-hydroxyiminomethyl-4-methylsulfonylbenzoate and 1 l of dichloromethane for 30 minutes. After the addition of 1.6 g of sodium acetate, 454 ml of sodium hypochlorite solution were added dropwise at 10° C., while simultaneously introducing ethylene. Subsequently, ethylene was introduced at 10° C. for a further 15 minutes. The mixture was stirred for 12 hours, the phases were separated and the organic phase was washed with water, dried and concentrated. 156.5 g (90% of theory) of methyl 2-chloro-(4,5-dihydroisoxazol-3-yl)-4-methylsulfonylbenzoate were obtained.

Provenance & Evidence