Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1) → (S)-(-)-2-(6-chloro-7-fluoro-1H-benzimidazol-1-yl)-N-{1-[4-(1-cyano-1-methylethyl)-3-methylphenyl]ethyl}acetamide

HRID 420010Notes

Reaction equation

HRID 420010 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[N:9]=[CH:8][N:7]([CH2:10][C:11]([OH:13])=O)[C:6]=2[C:14]=1[F:15].[NH2:16][CH:17]([C:19]1[CH:24]=[CH:23][C:22]([C:25]([CH3:29])([CH3:28])[C:26]#[N:27])=[CH:21][CH:20]=1)[CH3:18].[CH3:30]N(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>CN(C1C=CN=CC=1)C.CN(C=O)C.CO>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[N:9]=[CH:8][N:7]([CH2:10][C:11]([NH:16][C@H:17]([C:19]3[CH:24]=[CH:23][C:22]([C:25]([C:26]#[N:27])([CH3:28])[CH3:29])=[C:21]([CH3:30])[CH:20]=3)[CH3:18])=[O:13])[C:6]=2[C:14]=1[F:15]

Participants

7

Reactant 3

HCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 582984592-[4-(1-Aminoethyl)phenyl]-2-methylpropanenitrileHCID 58298473(6-chloro-7-fluoro-1H-benzimidazol-1-yl)acetic acid

Product 1

HCID 66649558(S)-(-)-2-(6-chloro-7-fluoro-1H-benzimidazol-1-yl)-N-{1-[4-(1-cyano-1-methylethyl)-3-methylphenyl]ethyl}acetamideYield 159.6%

Reagents, catalysts & solvents 3

HCID 142844-(Dimethylamino)pyridineCatalystHCID 887MethanolSolventHCID 6228DimethylformamideSolvent

Procedure

To a solution of (6-chloro-7-fluoro-1H-benzimidazol-1-yl)acetic acid (100 mg, 0.44 mmol) prepared according to scheme 13, (S) (−)-2-{4-[1-aminoethyl]phenyl}-2-methylpropanenitrile (88.5 mg 0.44 mmol) prepared according to scheme 20 or 21 and DMAP (106 mg, 0.88 mmol) stirred in anhydrous DMF (2.0 mL) is added HATU (166 mg, 0.44 mmol) after 18 hours of stirring, the mixture is diluted with methanol (200 μL) the solution is purified directly on a preparative LCMS system equipped with a Synergi Polar (4u) 21.2×50 mm column, mobile phase: A=water (0.1% TFA), B=MeCN using a short 40 to 60% B 10 min. gradient method. The pure fractions are combined the TFA neutralized with a 4N NaOH solution and then extracted with ethyl acetate which is separated dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to provide the expected product (S)-(−)-2-(6-chloro-7-fluoro-1H-benzimidazol-1-yl)-N-{1-[4-(1-cyano-1-methylethyl)-3-methylphenyl]ethyl}acetamide (290 mg, 53%) as a clear solid. 1H NMR (400 MHz, METHANOL-D4) δ ppm 1.50 (d, J=7.03 Hz, 3H) 1.69 (s, 6H) 5.03 (q, J=7.01 Hz, 1H) 5.07-5.18 (m, 2H) 7.29 (dd, J=9.37, 6.64 Hz, 3H) 7.39 (d, J=8.59 Hz, 2H) 7.44 (d, J=9.37 Hz, 1H) 7.48 (d, J=8.59 Hz, 2H) 8.14 (s, 1H) MS [M+H], calcd: 399.1. found: 399.2, [α]D=−138° (C=0.5 METHANOL)

Workup

  1. customprepared
  2. customis purified directly on a preparative LCMS system
  3. customequipped with a Synergi Polar (4u) 21.2×50 mm column, mobile phase
  4. customa short 40 to 60% B 10 min. gradient method
  5. extractionextracted with ethyl acetate which
  6. customis separated
  7. dry with materialdried over anhydrous Na2SO4
  8. filtrationfiltered
  9. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-1fc3f98c00184a689910baf2b4aedb76
Source dataset
uspto-grants-2012_01
Patent number
US08093402B2

Reaction notes

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