1,1'-Carbonyldiimidazole → Piperazine,1-(1h-indol-7-ylcarbonyl)-4-(2-pyrimidinyl)-

Beteiligte Stoffe

Reaktionsschritte

To a chilled solution of indole-7-carboxylic acid (3.22 g; 0.02 mole) in 30ml dimethylformamide was added 1,1'-carbonyldiimidazole (3.24 g; 0.02 mole). This was stirred at ice bath temperature for 40 minutes after whicha solution of 1-(2-pyrimidyl)piperazine (4.1 g; 0.025 moles) was added. This was stirred at ambient temperature for 3 hours and the solvent was concentrated in vacuo. The resulting oil was triturated with water to give5.7 g (93%) of a solid, m.p. 194°-197° C. The solid was recrystallized from methanol/water to give 4.7 g (76%) of 1-(1H-Indol-7-ylcarbonyl)-4-(2-pyrimidinyl)piperazine, m.p. 200°-202° C.

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