Diisopropylethylamine → 5-(3-Trifluoromethyl-phenyl)-1-isopropyl-6-methyl-4-oxo-1,4-dihydro-pyridine-3-carboxylic acid 4-(N,N,N'-trimethylsulfamimidoyl)-benzylamide

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Reaction Steps

A solution of 1-isopropyl-6-methyl-4-oxo-5-(3-trifluoromethyl-phenyl)-1,4-dihydro-pyridine-3-carboxylic acid (preparation 9.2, 186 mg, 0.55 mmol) in DMF (5 mL) is treated with DIPEA (300 μL, 1.72 mmol) and stirred at room temperature for 10 min. HBTU (312 mg, 0.82 mmol) is added, and the mixture is stirred for 20 min. A solution of 4-(aminomethyl)-N,N,N′-trimethylbenzenesulfonimidamide (preparation 60d, 156 mg, 0.69 mmol) in DMF (0.5 mL) is added and the mixture is stirred for 2 h. Water is added and the mixture is extracted with dichloromethane. The organic layer is dried over Na2SO4 and concentrated under reduced pressure. The residue is purified by preparative reversed phase HPLC (Xbridge, gradient of acetonitrile in water, 0.1% TFA). Yield: 41 mg (11% of theory); ESI mass spectrum: [M+H]+=549; r.t. HPLC: 1.17 min (Z001_005).

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