Hydrazine hydrate (1:1) → Methyl 2-chloro-3-hydrazinocarbonyl-4-methylsulfonylbenzoate

Participants

Reaction Steps

At room temperature, 3.11 g (10 mmol) of methyl 2-chloro-3-chloroformyl-4-methylsulfonylbenzoate in 50 ml of methylene chloride were added dropwise to 1.0 g (20 mmol) of hydrazine hydrate in 30 ml of methylene chloride. The reaction mixture was stirred at room temperature for 1 hour and then washed with water, dried and concentrated. 1.2 g (39% of theory) of methyl 2-chloro-3-hydrazinocarbonyl-4-methylsulfonylbenzoate were obtained.

Provenance & Evidence