4-(Piperidin-1-yl)aniline → 2-Isopropyl-5-phenyl-4-[(4-piperidin-1-ylphenyl)amino]isothiazol-3(2H)-one 1,1-dioxide

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A mixture of 4-chloro-2-isopropyl-5-phenylisothiazol-3(2H)-one 1,1-dioxide (0.150 g, 0.525 mmol), (4-piperidin-1-ylphenyl)amine (0.093 g, 0.525 mmol) and TEA (0.053 g, 0.525 mmol) in MeCN (2 ml) was heated in a microwave at 160° C. for 30 mins. The reaction mixture was evaporated and the residue was purified by silica gel column chromatography using 30% EtOAc in hexane as eluent, to give the title compound (0.169 g, 76%). 1H NMR (500 MHz CDCl3): δ 7.24-7.16 (m, 1H), 7.16-7.08 (m, 5H), 6.58 (d, 2H), 6.54 (d, 2H), 4.56-4.44 (m, 1H), 3.03 (t, 4H), 1.70-1.61 (m, 10H), 1.61-52(m, 3H); 13C NMR (125 MHz CDCl3): δ 159.2, 150.1, 131.1, 129.6, 128.8, 128.1, 127.6, 125.3, 123.6, 116.3, 109.3, 51.1, 47.9, 25.7, 24.4, 20.5; Mass Spectrum: M+H 426.

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