反应详情

DIPEA (38.44 mg, 51.81 μL, 0.2974 mmol), azetidine (8.490 mg, 0.1487 mmol) and bromo(tripyrrolidin-1-yl)phosphonium hexafluorophosphate (76.27 mg, 0.1636 mmol) were added to a solution of 4-(5-amino-6-(5-oxo-4,5-dihydro-1,3,4-oxadiazol-2-yl)pyrazin-2-yl)-N,N-dimethylbenzamide (50 mg, 0.1487 mmol) in DMF (485.1 μL) and the resulting solution stirred at room temperature for 2 h. The reaction mixture was filtered and purified by reverse phase preparative HPLC [Waters Sunfire C18, 10 mM, 100 Å column, gradient 10%-95% B (solvent A: 0.05% TFA in water; solvent B: CH3CN) over 16 minutes at 25 mL/min]. Product fractions were concentrated in vacuo and triturated with dichloromethane/diethyl ether to give the product (8.6 mg, 15% yield); 1H NMR (400.0 MHz, DMSO) d 2.96 (s, 3H), 3.00 (s, 6H), 4.25 (t, 4H), 7.52 (dd, 2H), 7.65 (br s, 1H), 8.04-8.06 (m, 2H) and 8.83 (s, 1H) ppm; MS (ES+) 366.21

1. filtrationThe reaction mixture was filtered
2. custompurified by reverse phase preparative HPLC [Waters Sunfire C18, 10 mM, 100 Å column, gradient 10%-95% B (solvent A: 0.05% TFA in water; solvent B: CH3CN) over 16 minutes at 25 mL/min]
3. concentrationProduct fractions were concentrated in vacuo
4. customtriturated with dichloromethane/diethyl ether