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

HRID 68408Notes

Reaction equation

HRID 68408 reaction equation
[NH2:1][CH2:2][C:3]1[C:4]([F:31])=[CH:5][C:6]([F:30])=[C:7]([C@:9]23[CH2:18][O:17][C@@H:16]([CH2:19][F:20])[CH2:15][C@H:14]2[CH2:13][S:12][C:11]([NH:21][C:22](=[O:29])[C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)=[N:10]3)[CH:8]=1.C(N(CC)CC)C.FC(F)(F)S(O[CH2:45][C:46]([F:49])([F:48])[F:47])(=O)=O>C(#N)C>[F:30][C:6]1[CH:5]=[C:4]([F:31])[C:3]([CH2:2][NH:1][CH2:45][C:46]([F:49])([F:48])[F:47])=[CH:8][C:7]=1[C@:9]12[CH2:18][O:17][C@@H:16]([CH2:19][F:20])[CH2:15][C@H:14]1[CH2:13][S:12][C:11]([NH:21][C:22](=[O:29])[C:23]1[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=1)=[N:10]2

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 803662,2,2-Trifluoroethyl trifluoromethanesulfonateHCID 86762645N-[(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

Product 1

HCID 86762647N-[(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

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Conditions

Temperature
70 °C

Procedure

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).

Workup

  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)

Sources & evidence

ORD record
ord-25736fca7c91420a9ecb4e96d3144587
Source dataset
uspto-grants-2014_09
Patent number
US08822456B2

Reaction notes

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