反应详情

A solution of (S)-tert-butyl-3-(((4-amino-2,2-dioxido-1H-benzo[c][1,2,6]thiadiazin-5-yl)oxy)methyl)piperidine-1-carboxylate (Example 2b, 7.0 g, 17.1 mmol) in conc. HCl:MeOH (1:1, 170 mL) was stirred at room temperature for 4 hours. The precipitate was collected by vacuum filtration, and dried to provide the desired product (3.75 g, 63.2%) as a white solid. 1H NMR (DMSO-d6, 400 MHz): δ 1.29 (m, 1H), 1.65 (m, 1H), 1.82 (m, 2H), 2.37 (m, 1H), 2.75 (m, 2H), 3.20 (d, J=8.0 Hz, 1H), 3.27 (d, J=11.2 Hz, 1H), 4.10 (d, J=6.0 Hz, 3H), 6.27 (d, J=8.4 Hz, 1H), 6.75 (d, J=8.4 Hz, 1H), 7.45 (t, J=8.4 Hz, 1H), 7.68 (s, 1H), 8.35 (br s, 1H), 8.74 (m, 1H), 9.05 (m, 1H), 10.98 (s, 1H). MS 311 (MH+).

1. filtrationThe precipitate was collected by vacuum filtration
2. customdried