Cyclopropylamine → 2-(2,5-Dichloropyrimidin-4-yl)-benzo[b]thiophene-4-carboxylic acid cyclopropylamide

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Diisopropylethylamine (1.42 mL) is added to a stirred suspension of 2-(2,5-dichloro-pyrimidin-4-yl)-benzo[b]thiophene-4-carboxylic acid (2.55 g, 7.84 mmol) in anhydrous dichloromethane (40 mL) at 0° C. under nitrogen to form a solution, followed by sequentially addition of cyclopropylamine (0.570 mL, 8.23 mmol) and powdered 1H-benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (3.64 g, 8.23 mmol). The resultant mixture is allowed to stir at 0° C. for 2 hours, then at ambient temperature for 3 hours. Diethyl ether (35 mL) is added in small portions to the mixture, the mixture is stirred for another 20 minutes before filtration. After drying, the crude title compound (2.45 g) is obtained as a tan solid. It is used without further purification.

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