反应详情

Pd on C, wet, degussa (50 mg,) was added to a stirred solution of (S)-benzyl 2-(5-(3-amino-6-(4-(isopropylsulfonyl)phenyl)pyrazin-2-yl)-1,3,4-oxadiazol-2-ylcarbamoyl)piperidine-1-carboxylate (251 mg, 0.25 mmol) in MeOH (5 mL)/ EtOAc (5 mL) and the reaction mixture was placed under an atmosphere of H2. The reaction was stirred at ambient temperature for 17 hours. Once the reaction had gone to completion, the Pd was removed by filtration and the solvent was removed in vacuo. The material was purified 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: CH3CN) over 16 minutes at 25 mL/min]. The fractions were collected and freeze-dried to give the product as a yellow solid (56.4 mg, 39%); 1H NMR (400.0 MHz, DMSO) d 1.19 (d, 6H), 1.38-1.49 (m, 2H), 1.51-1.61 (m, 1H), 1.80-1.83 (m, 1H), 1.89-1.92 (m, 1H), 2.09-2.11 (m, 1H), 3.01 (br s, 2H), 3.19-3.23 (m, 1H), 3.47-3.51 (m, 1H), 4.13 (d, 1H), 4.31 (br s, 1H), 7.81 (s, 2H), 7.91 (d, 2H), 8.52 (d, 2H), 9.06 (s, 1H) and 11.04 (br s, 1H) ppm; MS (ES+) 472.3

1. customthe Pd was removed by filtration
2. customthe solvent was removed in vacuo
3. customThe material was purified 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: CH3CN) over 16 minutes at 25 mL/min]
4. customThe fractions were collected
5. customfreeze-dried