Butyl chloroformate → HCID 21390884, compound

Participants

Reaction Steps

0.04 mol of chlorocarbonic acid n-butyl ester is added dropwise at 0° - 5° C, while stirring, to 0.04 mol of 3-hydrazino-6-chloro-indazole in 20 ml of pyridine. The reaction mixture is stirred for 3 hours at room temperature and then poured into ice water, and the colorless crystals which have precipitated are isolated by filtration. 3-n-Butoxycarbonylhydrazino-6-chloroindazole is obtained. After recrystallisation from a mixture of ligroin and ethanol (9 : 1), the melting point is 150° - 152° C. (Yield, 78% of theory).

Provenance & Evidence