反应详情

tert-Butyl (1-{4-[2-(4-nitrophenyl)-9H-imidazo[1,2-d]pyrido[2,3-b][1,4]benzodiazepin-3-yl]phenyl}cyclobutyl)carbamate (7.70 mg, 0.0128 mmol) was dissolved in DCM (0.5 mL). 4M HCl/dioxane (0.5 mL) was added to the mixture and stirred at room temperature for 4 hours. The mixture was concentrated and solidified with ether. The precipitated solids were collected by filtration and washed with ether to afford desired product (8.04 mg, quant.) as an orange solid. 1HNMR (DMSO-d6) 400 MHz δ: 8.72 (br s, 2H), 8.65 (s, 1H), 8.19-8.14 (m, 2H), 8.13-8.10 (m, 1H), 8.00-7.96 (m, 1H), 7.73-7.68 (m, 2H), 7.62-7.56 (m, 2H), 7.42-7.36 (m, 3H), 7.33-7.29 (m, 1H), 7.18-7.12 (m, 1H), 6.96-6.92 (m, 1H), 6.75 (dd, J=8.0, 4.8 Hz, 1H), 2.69-2.44 (m, 4H), 2.28-2.15 (m, 1H), 1.93-1.78 (m, 1H); LCMS: 501 [M+H].

1. concentrationThe mixture was concentrated
2. filtrationThe precipitated solids were collected by filtration
3. washwashed with ether