反应详情

TFA (556.9 mg, 376.3 μL, 4.884 mmol) was added to a solution of tert-butyl N-[[4-[5-[3-[bis(tert-butoxycarbonyl)amino]-6-(4-isopropylsulfonylphenyl)pyrazin-2-yl]isoxazol-3-yl]-3-methyl-phenyl]methyl]-N-methyl-carbamate (190 mg, 0.2442 mmol) in dichloromethane (4.750 mL) and the resulting yellow solution stirred overnight at room temperature. The reaction mixture was concentrated in vacuo and the residue taken up in methanol (2 mL) and dichloromethane (1 mL) and passed through an SCX cartridge and the product eluted with 2M ammonia in methanol and concentrated in vacuo. The filtrate was purified further by reverse phase preparative HPLC [Waters Sunfire C18, 10 μM, 100 Å column, gradient 10%-95% B (solvent A: 0.05% TFA in water; solvent B: CH3 CN) over 16 minutes at 25 mL/min]. The product fractions were collected and lypholised to give the product as a yellow solid (96.4 mg, 69% yield); 1H NMR (400.0 MHz, DMSO) d 1.18 (d, 6H), 2.61 (s, 3H), 2.62 (m, 3H), 3.48 (m, 1H), 4.20 (m, 2H), 7.24 (br s, 2H), 7.48-7.52 (m, 2H), 7.63 (s, 1H), 7.84 (m, 1H), 7.93 (m, 2H), 8.37 (m, 2H), 8.81 (br s, 2H) and 8.97 (s, 1H) ppm; MS (ES+) 478.3

1. concentrationThe reaction mixture was concentrated in vacuo
2. washthe product eluted with 2M ammonia in methanol
3. concentrationconcentrated in vacuo
4. customThe filtrate was purified further by reverse phase preparative HPLC [Waters Sunfire C18, 10 μM, 100 Å column, gradient 10%-95% B (solvent A: 0.05% TFA in water; solvent B: CH3 CN) over 16 minutes at 25 mL/min]
5. customThe product fractions were collected