Triethylamine → Losulazine

Beteiligte Stoffe

Reaktionsschritte

To a suspension of 4-[4-[[7-(trifluoromethyl)-4-quinolinyl]amino]benzoyl]piperazine (2 g, 0.005 mol) and 0.5 g of triethylamine in 30 ml of tetrahydrofuran is added dropwise a solution of p-fluorophenylsulfonyl chloride in 10 ml of tetrahydrofuran over a 15 minute period. After complete addition, the resultant mixture is stirred for 1 hour at room temperature. The resulting mixture is filtered and the white solid is washed with more tetrahydrofuran and dried. This is re-crystallized from methanol/methylene chloride to give 2.5 g (92%) of white crystalline 1-[(4-fluorophenyl)sulfonyl]-4-[4-[[7-(trifluoromethyl)-4-quinolinyl]amino]benzoyl]piperazine of melting point 251°-253° C.

Herkunft & Nachweise