反应详情

To a stirred solution of 5-((2-(Piperidin-4-yl)-2H-1,2,3-triazol-4-yl)methoxy)-2-(1H-tetrazol-1-yl)pyridine (225 mg, 0.688 mmol) (Intermediate 15) dissolved in DMF (10 mL) was added triethylamine (4 eq.) and o-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium tetrafluoroborate (TBTU) (2 eq.). The solution was stirred for 5 minutes and 2-(1-(tert-butoxycarbonyl)piperidin-4-yl)acetic acid (1.5 eq.) was added and was stirred at room temperature for 3 h. The reaction was quenched with water and extracted with ethyl acetate. The organic layer was washed with brine, and dried over sodium sulfate. The solution was filtered and concentrated in vacuo. The crude product was purified by flash column chromatography on silica gel eluting with ethyl acetate and hexanes to afford the desired product. 1H NMR (DMSO-d6): δ 10.07 (1H, s), 8.40 (1H, d), 8.00 (1H, d), 7.93 (1H, s), 7.86 (1H, dd), 5.34 (2H, s), 4.78 (1H, m), 4.35 (1H, m), 3.85-3.94 (3H, m), 3.21 (1H, m), 2.64-2.82 (3H, m), 2.27 (2H, d), 2.10 (2H, m), 1.86 (3H, m), 1.60 (2H, d), 1.35 (9H, s), 1.99 (2H, m).

1. stirringwas stirred at room temperature for 3 h
2. customThe reaction was quenched with water
3. extractionextracted with ethyl acetate
4. washThe organic layer was washed with brine
5. dry with materialdried over sodium sulfate
6. filtrationThe solution was filtered
7. concentrationconcentrated in vacuo
8. customThe crude product was purified by flash column chromatography on silica gel eluting with ethyl acetate and hexanes