反应详情

温度

70 °C

(5R)-5,6-bis(nitrooxy)hexyl 1-chloroethyl carbonate (7.67 g, 23.2 mmol) was added to a stirred solution of 2-butyl-4-chloro-1-{[2′-(1-trityl-1H-tetrazol-5-yl)biphenyl-4-yl]methyl}-1H-imidazole-5-carboxylic acid (6.30 g, 9.3 mmol) and Cs2CO3 (3.02 g, 9.3 mmol) in DMF (186 mL). The solution was stirred at 70° C. for 2 h. Water (50 mL) was added and the solution was extracted with EtOAc (3×100 mL). The combined organic layers were dried (MgSO4), filtered, and concentrated in vacuo. The residue was redissolved in MeOH (186 mL). After stirring at 70° C. for 2 h, the solution was concentrated in vacuo. The residue was purified by HPLC chromatography (50×100 mm C-18) eluting with 40-100% MeCN/water+0.05% TFA. The diastereomers were then separated by HPLC chromatography on silica gel (ChiralPak AD-H) eluting with 20% MeOH in supercritical CO2 to give the title compound as a white solid. 1H NMR (500 MHz, CD3OD) δ 8.06 (d, J=7.5 Hz, 1H), 7.62 (td, J=7.5, 1.0 Hz, 1H), 7.56 (td, J=6.5, 1.0 Hz, 1H), 7.44 (d, J=6.5 Hz, 1H), 7.17 (d, J=8.0 Hz, 2H), 6.99 (d, J=8.0 Hz, 2H), 6.87 (q, J=5.5 Hz, 1H), 5.54 (d, J=6.0 Hz, 2H), 5.24 (ddd, J=13.0, 6.2, 3.0 Hz, 1H), 4.73 (dq, J=12.5, 1.5 Hz, 1H), 4.46 (dd, J=13.0, 6.5 Hz, 1H), 4.14-4.04 (m, 1H), 2.76 (t, J=7.7 Hz, 2H), 1.76-1.59 (m, 6H), 1.61 (d, J=5.5 Hz, 3H) 1.55-1.40 (m, 2H), 1.38 (hex, J=7.5 Hz, 2H), 0.90 (t, J=7.5 Hz, 3H); LCMS (M+H) found 731.1.

1. extractionthe solution was extracted with EtOAc (3×100 mL)
2. dry with materialThe combined organic layers were dried (MgSO4)
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. dissolutionThe residue was redissolved in MeOH (186 mL)
6. stirringAfter stirring at 70° C. for 2 h
7. concentrationthe solution was concentrated in vacuo
8. customThe residue was purified by HPLC chromatography (50×100 mm C-18)
9. washeluting with 40-100% MeCN/water+0.05% TFA
10. customThe diastereomers were then separated by HPLC chromatography on silica gel (ChiralPak AD-H)
11. washeluting with 20% MeOH in supercritical CO2