Dimethylformamide → tert-butyl 4-((9-methyl-2-(2-methyl-1H-benzo[d]imidazol-1-yl)-6-morpholino-9H-purin-8-yl)methyl)piperidine-1-carboxylate

Participants

Reaction Steps

To a solution of N-(tert-Butoxycarbonyl)-L-alanine (80.0 mg, 0.423 mmol) in N,N-Dimethylformamide (5.0 mL, 0.064 mol) was added HATU (0.154 g, 0.404 mmol), 1-hydroxybenzotriazole (HOBt, 0.00839 g, 0.0621 mmol) and triethylamine (0.10 mL, 0.72 mmol). The resulting yellow solution was stirred at room temperature for 5 minutes before the addition of 4-(9-methyl-2-(2-methyl-1H-benzo[d]imidazol-1-yl)-8-(piperidin-4-ylmethyl)-9H-purin-6-yl)morpholine 520 (0.150 g, 0.310 mmol;). The reaction was stirred at room temperature for 2 hours. The reaction mixture was partitioned between brine and EtOAc. The organic extract was washed with brine, dried over Na2SO4, filtered and concentrated. The crude product was purified by flash chromatography (0-5% MeOH in DCM) to give tert-butyl 4-((9-methyl-2-(2-methyl-1H-benzo[d]imidazol-1-yl)-6-morpholino-9H-purin-8-yl)methyl)piperidine-1-carboxylate (0.15 g, 78%). LCMS m/z: 618.3 (MH+).

Provenance & Evidence