tert-Butyl carbazate → tert-butyl N'-{2-[1-(2,6-dichlorobenzyl)-3-methyl-1H-indazole-6-yl]acetyl}hydrazinecarboxylate

Participants

Reaction Steps

To a solution of the compound [97] (73.2 mg) in chloroform (1.1 mL) were added tert-butylcarbazate (222.0 mg), 1-hydroxybenzotriazole monohydrate (113.5 mg) and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (161.0 mg) at room temperature, and then the reaction mixture was stirred for 18 hours. The reaction mixture was quenched with water, and extracted with ethyl acetate. The obtained organic layer was dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography to give the titled compound (84.0 mg) as a white solid.

Provenance & Evidence