Triethylamine → N-[(4aR,6R,8aS)-8a-(2,4-difluoro-5-{[(2,2,2-trifluoroethyl)amino]methyl}phenyl)-6-(fluoromethyl)-4,4a,5,6,8,8a-hexahydropyrano[3,4-d][1,3]thiazin-2-yl]benzamide

Temperatur

70 °C

A solution of N-[(4aR,6R,8aS)-8a-[5-(aminomethyl)-2,4-difluorophenyl]-6-(fluoromethyl)-4,4a,5,6,8,8a-hexahydropyrano[3,4-d][1,3]thiazin-2-yl]benzamide (C26) (0.598 g, 1.33 mmol) in acetonitrile (13 mL) was treated with triethylamine (0.277 mL, 2.00 mmol) and 2,2,2-trifluoroethyl trifluoromethanesulfonate (0.288 mL, 2.00 mmol). The reaction vial was sealed and the resulting solution was stirred at 70° C. for 16 hours. The reaction mixture was cooled to room temperature and concentrated under reduced pressure to yield a brown solid. The solid was partitioned between water (100 mL) and ethyl acetate (100 mL). The organics were isolated and the aqueous layer was extracted further with ethyl acetate (2×50 mL). The combined organics were then washed with brine (100 mL), dried over sodium sulfate, filtered and concentrated under reduced pressure. Purification via silica gel chromatography (Gradient: 0% to 60% ethyl acetate in heptane) afforded the product as a white solid. Yield: 0.4064 g, 57%. LCMS m/z 532.0 [M+H+]. 1H NMR (400 MHz, CD3OD) δ 8.12 (br d, J=8 Hz, 2H), 7.45-7.59 (m, 3H), 7.08 (dd, J=12.3, 9.6 Hz, 1H), 4.50-4.52 (m, 1H), 4.38-4.40 (m, 1H), 4.15 (dd, J=12.1, 2 Hz, 1H), 3.90-3.94 (m, 3H), 3.00 (dd, J=13.4, 4.0 Hz, 1H), 2.77 (dd, J=13.1, 2.9 Hz, 1H), 1.87-1.96 (m, 1H), 1.69-1.72 (m, 1H).

1. customThe reaction vial was sealed
2. temperatureThe reaction mixture was cooled to room temperature
3. concentrationconcentrated under reduced pressure
4. customto yield a brown solid
5. customThe solid was partitioned between water (100 mL) and ethyl acetate (100 mL)
6. customThe organics were isolated
7. extractionthe aqueous layer was extracted further with ethyl acetate (2×50 mL)
8. washThe combined organics were then washed with brine (100 mL)
9. dry with materialdried over sodium sulfate
10. filtrationfiltered
11. concentrationconcentrated under reduced pressure
12. customPurification via silica gel chromatography (Gradient: 0% to 60% ethyl acetate in heptane)

ORD-Eintrag

ord-25736fca7c91420a9ecb4e96d3144587

Quelldatensatz

uspto-grants-2014_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08822456B2