Triethylamine → N'-(cyclopropanecarbonyl)-3-iodo-4-methylbenzohydrazide

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A solution of cyclopropanecarbonyl chloride (1.81 mL, 20.0 mmol) in dichloromethane (20 mL) was added dropwise to a stirred solution of 3-iodo-4-methylbenzohydrazide (preparation 55b, 5.00 g, 18.1 mmol) and triethylamine (2.78 mL, 20.0 mmol) in dichloromethane (80 mL) at 0° C. After 2 hours stirring at ambient temperature, the mixture was concentrated in vacuo and water was added to the residue. The resultant precipitate was filtered and was washed with water and diethyl ether to give the title compound (4.75 g, 76%) as a white solid.

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