反应详情

To a mixture of Intermediate 24 (570 mg, 2.69 mmol), 6-methyl-2-(1H-1,2,3-triazol-1-yl)nicotinic acid (603 mg, 2.95 mmol), benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (1200 mg, 2.69 mmol) in DCM (15 mL) was added TEA (1.1 mL, 8.06 mmol). The resulting mixture was stirred for 5 h at ambient temperature at which time water (30 mL) was added. The aqueous layer was extracted with DCM (15 mL) three times. The organic layers were combined, dried over Na2SO4, filtered and concentrated under reduced pressure. The crude residue was purified by FCC (SiO2, ethyl acetate/hexanes, 0-40%) to yield (1S,6R)-tert-butyl 8-(6-methyl-2-(1H-1,2,3-triazol-1-yl)nicotinoyl)-3,8-diazabicyclo[4.2.0]octane-3-carboxylate (1.05 g, 98%). MS (ESI) mass calcd. for C20H26N6O3, 398.2; m/z found, 399.1 [M+H]+. 1H NMR (500 MHz, CDCl3): 8.48-8.38 (m, 1H), 7.82-7.79 (m, 1H), 7.77-7.64 (m, 1H), 7.33-7.23 (m, 1H), 4.53-4.27 (m, 2H), 4.06-3.89 (m, 1H), 3.80-3.36 (m, 4H), 3.01-2.90 (m, 1H), 2.62-2.58 (m, 3H), 2.03-1.76 (m, 2H), 1.53-1.42 (m, 9H).

1. additionwas added
2. extractionThe aqueous layer was extracted with DCM (15 mL) three times
3. dry with materialdried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated under reduced pressure
6. customThe crude residue was purified by FCC (SiO2, ethyl acetate/hexanes, 0-40%)