Hydrochloric Acid → N-(2,6-Difluorophenyl)-5-formylamino-1,2,4-triazole-3-sulfonamide

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Reaction Conditions

Reaction Steps

To a mixture of 1.3 g (10 mmol) of 2,6-difluoroaniline in 4 ml of pyridine was added 1.94 g (9.2 mmol) of 5-formylamino-3-chlorosulfonyl-1,2,4-triazole over a period of 5 minutes. The mixture was heated with stirring to 70° C. for 4 hours. It was then cooled and dispersed between 25 ml of 1N aqueous sodium hydroxide and 50 ml of chloroform. The aqueous layer was acidified with aqueous hydrochloric acid and filtered. The solids collected were dried to obtain 167 g (60 percent of theory) of the title compound, m.p. 258°-260° C. The infrared spectrum was consistent with the assigned structure.

Provenance & Evidence