Trifluoroacetic acid → (S)-4-(2-amino-5-(4-methyltetrahydro-2H-pyran-4-yl)pyridin-3-yl)-2-fluoro-N-(2-hydroxy-1-phenylethyl)benzamide

HRID 595934Notes

Reaction equation

HRID 595934 reaction equation
Br[C:2]1[C:3]([NH2:15])=[N:4][CH:5]=[C:6]([C:8]2([CH3:14])[CH2:13][CH2:12][O:11][CH2:10][CH2:9]2)[CH:7]=1.[F:16][C:17]1[CH:34]=[C:33](B2OC(C)(C)C(C)(C)O2)[CH:32]=[CH:31][C:18]=1[C:19]([NH:21][C@@H:22]([C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1)[CH2:23][OH:24])=[O:20].C(=O)([O-])[O-].[Na+].[Na+].C(O)(C(F)(F)F)=O>COCCOC.C(OCC)(=O)C.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].C(Cl)Cl>[NH2:15][C:3]1[C:2]([C:33]2[CH:32]=[CH:31][C:18]([C:19]([NH:21][C@@H:22]([C:25]3[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=3)[CH2:23][OH:24])=[O:20])=[C:17]([F:16])[CH:34]=2)=[CH:7][C:6]([C:8]2([CH3:14])[CH2:13][CH2:12][O:11][CH2:10][CH2:9]2)=[CH:5][N:4]=1

Participants

8

Reactant 4

HCID 6422Trifluoroacetic acidHCID 10340Sodium CarbonateHCID 1180457983-bromo-5-(4-methyltetrahydro-2H-pyran-4-yl)pyridin-2-amineHCID 123975973(S)-2-fluoro-N-(2-hydroxy-1-phenylethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzamide

Product 1

HCID 118045845(S)-4-(2-amino-5-(4-methyltetrahydro-2H-pyran-4-yl)pyridin-3-yl)-2-fluoro-N-(2-hydroxy-1-phenylethyl)benzamideYield 34.5%

Reagents, catalysts & solvents 3

HCID 178418807HCID 178418807, compoundCatalystHCID 80711,2-DimethoxyethaneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
120 °C

Procedure

To a solution of 3-bromo-5-(4-methyltetrahydro-2H-pyran-4-yl)pyridin-2-amine (70 mg, 0.26 mmol) in DME (4 mL) was added (S)-2-fluoro-N-(2-hydroxy-1-phenylethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzamide (298 mg, 0.77 mmol) and sodium carbonate (0.64 mL, 1.29 mmol). The mixture was purged with nitrogen for 10 min, then PdCl2(dppf)-CH2Cl2 (31.6 mg, 0.039 mmol) was added. The reaction mixture was heated to 120° C. in an oil bath for 2 h. The reaction mixture was diluted with ethyl acetate, washed with water, brine, dried over sodium sulfate and concentrated. The resulting residue was purified by flash column chromatography on silicagel (ISCO) eluting with 0-100% ethyl acetate in heptane to give 70 mg crude product, which was purified by HPLC to give (S)-4-(2-amino-5-(4-methyltetrahydro-2H-pyran-4-yl)pyridin-3-yl)-2-fluoro-N-(2-hydroxy-1-phenylethyl)benzamide (40.8 mg, 0.089 mmol, 34.5% yield) as TFA salt. LCMS (m/z): 450 (MH+), 0.61 min; 1H NMR (400 MHz, CDCl3) δ ppm 8.22 (t, J=7.83 Hz, 1H) 7.77-7.65 (m, 2H) 7.50 (dd, J=11.74, 7.43 Hz, 1H) 7.42-7.36 (m, 4H) 7.33 (d, J=7.43 Hz, 2H) 7.21 (d, J=11.74 Hz, 1H) 5.33 (d, J=4.70 Hz, 1H) 4.08-3.94 (m, 2H) 3.83-3.65 (m, 4H) 1.97 (ddd, J=13.40, 8.12, 5.09 Hz, 2H) 1.72 (d, J=13.69 Hz, 2H) 1.35 (s, 3H)

Workup

  1. customThe mixture was purged with nitrogen for 10 min
  2. washwashed with water, brine
  3. dry with materialdried over sodium sulfate
  4. concentrationconcentrated
  5. customThe resulting residue was purified by flash column chromatography on silicagel (ISCO)
  6. washeluting with 0-100% ethyl acetate in heptane
  7. customto give 70 mg crude product, which
  8. customwas purified by HPLC

Sources & evidence

ORD record
ord-c2de10ee74314ecd8c6bc39e078a82b6
Source dataset
uspto-grants-2016_01
Patent number
US09242996B2

Reaction notes

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