反应详情

To a suspension of methyl (4-{4-[(4-chlorophenyl)(hydroxy)methyl]-3-cyano-5-[1-(tetrahydro-2H-pyran-2-yl)-1H-1,2,4-triazol-3-yl]-2-thienyl}pyridin-2-yl)carbamate (0.0450 g, 0.0817 mmol) in 1,4-dioxane (4.0 mL, 51 mmol) and cooled in an ice bath was added 6.0 M hydrochloric acid in water (4.0 mL, 24 mmol). The resulting solution was brought to room temperature. Hexane (5.0 mL) was added and the bi layer mixture was stirred for 4 hours. The hexane was separated and the aqueous layer was washed with hexane twice. The aqueous layer was concentrated on a rotavapor to ˜half volume; diluted with ice and water, basified with saturated aqueous NaHCO3 to pH ˜7.5, extracted with EtOAc (4×). The combined EtOAc solutions were washed with brine, dried over Na2SO4, filtered, and rotavaped to give a crude solid. The crude solid was chromatographed on a silica gel column using MeOH/DCM (0/100 to 5/95) to afford a solid product (33 mg, yield 82%). LC/MS: (FA) ES+ 467, 469. 1H NMR (400 MHz, d6-dmso) δ 10.50 (s, 1H), 8.82 (s, 1H), 8.41 (m, 1H), 8.20 (s, 1H), 7.57 (m, 2H), 7.39 (m, 3H), 7.06 (s, 1H), 6.59 (s, br, 1H), 3.69 (s, 3H).

1. temperaturecooled in an ice bath
2. customwas brought to room temperature
3. customThe hexane was separated
4. washthe aqueous layer was washed with hexane twice
5. concentrationThe aqueous layer was concentrated on a rotavapor to ˜half volume
6. additiondiluted with ice and water
7. extractionextracted with EtOAc (4×)
8. washThe combined EtOAc solutions were washed with brine
9. dry with materialdried over Na2SO4
10. filtrationfiltered
11. customto give a crude solid
12. customThe crude solid was chromatographed on a silica gel column