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

Participants

Reaction Steps

To a solution of (7-fluoro-1H-benzimidazol-1-yl)acetic acid (250 mg, 1.29 mmol) prepared according to scheme 5, 2-[4-(1-aminoethyl)-3-methylphenyl]-2-methylpropanenitrile (260 mg 1.29 mmol) prepared according to scheme 15 and DMAP (156 mg, 1.29 mmol) stirred in anhydrous DMF (4.0 mL) is added HATU (490 mg, 1.29 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 (+) and (−)-N-{1-[4-(1-cyano-1-methylethyl)-2-methylphenyl]ethyl}-2-(7-fluoro-1H-benzimidazol-1-yl)acetamide (306 mg, 63%) as a white solid. 1H NMR (400 MHz, METHANOL-D4) δ ppm 1.44 (d, J=6.84 Hz, 3H) 1.66 (s, 6H) 2.35 (s, 3H) 5.02-5.14 (m, 2H) 5.19 (q, J=7.03 Hz, 1H) 6.99 (dd, J=11.52, 7.42 Hz, 1H) 7.19 (dt, J=8.15, 4.98 Hz, 1H) 7.26 (d, J=2.15 Hz, 1H) 7.32 (dd, J=8.01, 2.34 Hz, 3H) 7.39 (d, J=8.20 Hz, 1H) 7.45 (d, J=7.62 Hz, 1H) 8.09 (s, 1H), MS [M+H], calcd: 379.2. found: 379.2.

Provenance & Evidence