反应详情

To a mixture of (R)-2-tert-butyl 1-methyl 6-hydroxy-3,4-dihydroisoquinoline-1,2(1H)-dicarboxylate (99 mg, 0.32 mmol),N-(3-(hydroxymethyl)phenyl)acetamide (53 mg, 0.32 mmol)and PPh3 (92 mh, 0.35)in THF(2 mL) at 0° C. was added DEAD (60 μL, 0.38 mmol). The reaction mixture was warmed to room temperature and stirred overnight. It was concentrated and purified by preparative HPLC (Phenomenex 20×100 mm eluting with 0-100% MeOH/H2O (90% in H2O) gradient over 8 min with flow rate 25 mL/min) to yield (R)-2-tert-butyl 1-methyl 6-(3-acetamidobenzyloxy)-3,4-dihydroisoquinoline-1,2(1H)-dicarboxylate as a white solid(39 mg, 27%). HPLC retention time (Method C)=3.59 min. LC/MS (ESI) (M+H)+=477.26. 1H NMR (CDCl3, 400 MHz), 1:1 rotamers, δ ppm 1.47 (s, 5H), 1.49 (s, 4H), 2.71-2.98 (m, 2H), 3.60-3.84 (m, 2H), 3.70 (s, 3H), 5.03 (s, 2H), 5.37 (s, 0.5H), 5.53 (s, 0.5H), 6.74 (s, 1H), 6.82 (dd, J=8.59, 2.53 Hz, 1H), 7.15 (d, J=7.58 Hz, 1H), 7.29-7.39 (m, 2H), 7.46 (d, J=8.08 Hz, 1H), 7.58 (br. s., 1H).

1. concentrationIt was concentrated
2. custompurified by preparative HPLC (Phenomenex 20×100 mm eluting with 0-100% MeOH/H2O (90% in H2O) gradient over 8 min with flow rate 25 mL/min)