Triethylamine → 2-tert-Butyl-4-{[3-(3,5-dimethyl-1H-pyrazol-1-yl)propyl]amino}-5-phenylisothiazol-3(2H)-one 1,1-dioxide

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2-tert-Butyl-4-chloro-5-phenylisothiazol-3(2H)-one 1,1-dioxide (150 mg, 0.5 mmol), 3-(3,5-dimethyl-pyrazol-1-yl)-propylamine tartrate (167 mg, 0.55 mmol) were mixed in MeCN (3 ml). Triethylamine (0.23 ml, 1.65 mmol) was added and the mixture was heated in a microwave reactor at 120° C. for 15 mins. The reaction mixture was evaporated to dryness and the residue was purified by column chromatography (ISOLUTE SI, 20 g/70 ml), eluting with DCM and then MeOH/DCM (1:99), to give the title compound (195 mg, 94%). 1H NMR (400 MHz, CDCl3): δ 1.70 (s, 9H), 1.72-1.79 (m, 2H), 2.05 (s, 3H), 2.18 (s, 3H), 2.81-2.86 (m 2H), 3.79 (t, 2H), 5.71 (bs, 2H), 7.37-7.46 (m, 5H); 13C NMR (100 MHz, CDCl3): δ 10.8, 13.4, 27.5, 29.2, 41.5, 45.4, 61.3, 105.1, 106.8, 125.0, 128.4, 129.4, 131.4, 135.0, 138.5, 147.7, 159.3; Mass Spectrum: M+H+ 417.

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