Formamide → N-cyano-N'-[2-(3-formylamino-2-oxobutylthio)ethyl]-N"-methylguanidine

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Reaction Steps

In 2.5 ml of formamide were dissolved 131 mg of N-[2-(2-chloro-3-oxobutylthio)ethyl]-N'-cyano-N"-methylguanidine, 136 mg of sodium formate and 320 mg of ammonium formate, and the solution was stirred at room temperature for 3 days. Then, 420 mg of sodium hydrogencarbonate was added to the solution and formamide was removed under reduced pressure, and the obtained residue was refined by silica gel column chromatography (developing solvent: chloroform/ethanol=5/1) to obtain 28 mg of a colorless oily product (the yield was 19%).

Provenance & Evidence