Hydrochloric Acid → HCID 57433644, Verbindung

The tert-butyl 4-({4-[6-(4-fluoro-3-methoxyphenyl)imidazo[2,1-b][1,3]thiazol-5-yl]pyrimidin-2-yl}amino)piperidine-1-carboxylate (0.713 g, 1.36 mmol) was dissolved in 15 ml of dioxane and treated with 7.5 ml of anhydrous 4N HCl in dioxane at room temperature (RT). The reaction mixture was stirred at room temperature for two hours. The mixture was then diluted with 25 ml of ether and stirred until product separated as a solid. Solid product was filtered and washed with ether. The solid was dissolved in MeOH (20 ml) and concentrated to dryness twice. The product was dried at high vacuum to yield 0.652g of yellow solid (bis HCl salt) (96%). 400 MHz 1H NMR (DMSO-d6 at 60° C.) δ: 9.32 (br. s, 1H), 8.10 (d, J=4.7 Hz, 1H), 7.61 (d, J=4.3 Hz, 1H), 7.39 (dd, J=8.2, 2.0 Hz, 1H), 7.33 (dd, J=11.3, 8.2 Hz, 1H), 7.19 (ddd, J=8.2, 4.3, 2.0 Hz, 1H), 6.56 (d, J=6.7 Hz, 1H), 4.30-4.20 (m, 1H), 3.86 (s, 3H), 3.40-3.32 (m, 2H), 3.12-2.96 (m, 2H), 2.22-2.12 (m, 2H), 1.99-1.86(m, 2H). LCMS: 425 [M+H].