Triethylamine → Tert-butyl 2-{[1-(4-bromophenyl)cyclopropyl]carbonyl}hydrazinecarboxylate

Participants

Reaction Steps

A solution of the compound (25.8 g, 107 mmol) obtained in Example 16-1), 1-hydroxybenzotriazole (15.9 g, 118 mmol), triethylamine (37.4 mL, 268 mol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (22.6 g, 118 mmol), and tert-butoxycarbonylhydrazide (17.0 g, 129 mmol) in N,N-dimethylformamide (500 mL) was stirred at room temperature for 15 h. Saturated aqueous sodium hydrogencarbonate was added to the reaction mixture, and the mixture was extracted with dichloromethane. The organic layer was washed with water and saturated sodium chloride solution in this order and dried with anhydrous sodium sulfate, and then the solvent was distilled off under reduced pressure. The residue was dried under reduced pressure to obtain the title compound (36.2 g, 95%) as a white solid.

Provenance & Evidence