Diisopropylethylamine → (S)-2-{4-[3-(2-hydroxy-2-methyl-propyl)-phenoxy]-2-oxo-2,5-dihydro-pyrrol-1-yl}-4-methyl-pentanoic acid [1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-amide

Participants

Reaction Steps

To a solution of (S)-2-{4-[3-(2-hydroxy-2-methyl-propyl)-phenoxy]-2-oxo-2,5-dihydro-pyrrol-1-yl}-4-methyl-pentanoic acid (prepared as in Example 235, 0.159 g, 0.44 mmol) in N,N-dimethylformamide (5 mL) was added 1-(3-amino-pyrazol-1-yl)-2-methyl-propan-2-ol (prepared in U.S. Pat. Appl. US2008021032 Example 80, 0.102 g, 0.66 mmol), N,N-diisopropylethylamine (0.312 g, 2.41 mmol) and benzotriazol-1-yl-oxy-tris(dimethylamino)phosphonium hexafluorophosphate (0.778 g, 1.76 mmol) at 0° C. The mixture was allowed to slowly warm up to room temperature and stirred for 48 h. The mixture was then concentrated in vacuo, the residue taken up in ethyl acetate and washed with aqueous saturated ammonium chloride and brine and then dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified by ISCO column chromatography (Silicycle 40 g, 10% to 100% ethyl acetate/hexanes) which afforded (S)-2-{4-[3-(2-hydroxy-2-methyl-propyl)-phenoxy]-2-oxo-2,5-dihydro-pyrrol-1-yl}-4-methyl-pentanoic acid [1-(2-hydroxy-2-methyl-propyl)-1H-pyrazol-3-yl]-amide (0.060 g, 30%) as a white solid: HR-ES-MS m/z calculated for C27H38N4O5 [M+H]+ 499.2915, observed 499.2915; 1H NMR (300 MHz, DMSO-d6) δ ppm 0.83-0.97 (m, 6H), 1.06 (br. s., 12H), 1.36-1.63 (m, 2H), 1.66-1.86 (m, 1H), 2.68 (s, 2H), 3.89 (s, 2H), 4.18 (d, J=18.1 Hz, 1H), 4.37 (d, J=1.8 Hz, 1H), 4.57 (d, J=18.1 Hz, 1H), 4.68 (d, J=1.5 Hz, 1H), 4.83 (s, 1H), 4.84-4.94 (m, 1H), 6.44 (s, 1H), 7.07-7.19 (m, 3H), 7.27-7.42 (m, 1H), 7.54 (s, 1H), 10.78 (s, 1H).

Provenance & Evidence