Triethylamine → Hexahydro-1-[[4-(trifluoromethyl)phenyl]sulfonyl]-1H-1,4-diazepine

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The 1-(4-trifluoromethylphenylsulphonyl)homopiperazine was prepared as follows. 4-Trifluoromethylphenylsulphonylchloride (1.5 g) in 20 ml dichloromethane was added dropwise to 5 g homopiperazine and 1.8 ml triethylamine in 55 ml dichloromethane and left stirring overnight. Washed with water and brine, dried (MgSO4), and evaporated to give 1-(4-trifluoromethylphenylsulphonyl)homopiperazine (1.80 g) as a colourless solid; NMR (CDCl3) 1.75 (1H,br), 1.78-1.9 (2H,m), 2.9-3.0 (4H,m), 3.3-3.44 (4H,m), 7.78 (2H,d),

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