1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → tert-butyl N-[4-[3-[2-methyl-6-(4-sulfamoylbutanoylamino)phenyl]phenyl]sulfonyl-5-methylsulfanylthiophene-2-carboximidoyl]carbamate

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Reaction Steps

{[4-(2′-Amino-6′-methyl-biphenyl-3-sulfonyl)-5-methylsulfanyl-thiophen-2-yl]-imino-methyl}-carbamic acid tert-butyl ester (0.013 g, 0.025 mmol) [example 25, step c] was added to a solution of 4-sulfamoyl-butyric acid (0.011 g, 0.068 mmol), EDCI (0.013 g, 0.068 mmol) and HOBt (0.009 g, 0.068 mmol) in DMF [0.5 mL] at room temperature. The reaction was stirred for 24 hours and then evaporated. Column chromatography (25% EtOAc in hexanes) of the residue yielded the title compound (0.010 g, 60%) as a solid. ESI-MS (m/z): Calcd. for C28H34N4O7S4: 666.13; found: 666.8.

Provenance & Evidence