Hydrochloric Acid → HCID 13769128, compound

Participants

Reaction Steps

12.5 g (0.034 mol) of 1-(4-chloro-2-fluoro-5-nitrophenyl)-3-methyl-4-bromo-5-chloropyrazole (reference example 2) were added in the solution of 13.6 g of iron powder, 44 ml of ethanol, 20 ml of water and 0.2 ml of hydrochloric acid at 70° to 75° C., under stirring. After stirred for 2 hours at 75° C., the reaction mixture was filtered and the filtrate added with cold water was extracted with ethyl acetate. The ester layer was washed with water, concentrated and purified on column chromatography to obtain 11.0 g of brown crystal, melting point: 113° to 116° C. in yield of 96%.

Provenance & Evidence