Hydrochloric Acid → HCID 44252018, compound

Participants

Reaction Conditions

Reaction Steps

A solution of (S)-2-[4-(2-ethoxy-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid [1-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl-methyl)-1H-pyrazol-3-yl]-amide (prepared as in Example 83, 95 mg, 0.19 mmol) in tetrahydrofuran (20 mL) was treated with 2N aqueous hydrochloric acid (10 mL). The reaction mixture was stirred for 4 h at 25° C. The reaction mixture was diluted with ethyl acetate, washed with water, a saturated sodium chloride solution and dried over sodium sulfate. The organic layer was concentrated to afford (S)-2-[4-(2-ethoxy-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid [1-((R)-2,3-dihydroxy-propyl)-1H-pyrazol-3-yl]-amide as a fluffy material. This material was dissolved in dichloromethane (20 mL) and treated with hydrogen chloride in diethyl ether (1 M, 2 mL). Solvents were evaporated and the residue was triturated with diethyl ether. The mixture was filtered to give (S)-2-[4-(2-ethoxy-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4-methyl-pentanoic acid [1-((R)-2,3-dihydroxy-propyl)-1H-pyrazol-3-yl]-amide hydrochloride (51 mg, 61%) as a light yellow solid: HR-ES-MS m/z calculated for C24H32N4O6 [M+H]+ 473.2395, observed 473.2395; 1H NMR (300 MHz, DMSO-d6) δ ppm 0.88 (d, J=6.4 Hz, 3H) 0.91 (d, J=6.4 Hz, 3H) 1.24 (t, J=6.9 Hz, 3H) 1.40 (br. s., 1H) 1.46-1.62 (m, 1H) 1.64-1.80 (m, 1H) 3.17-3.40 (m, 2H) 3.69-3.79 (m, 1H) 3.79-3.90 (m, 1H) 3.98-4.11 (m, 4H) 4.49 (d, J=18.4 Hz, 1H) 4.72 (s, 1H) 4.86 (dd, J=11.0, 4.7 Hz, 1H) 6.38 (d, J=2.1 Hz, 1H) 6.97 (t, J=7.1 Hz, 1H) 7.13-7.20 (m, 1H) 7.21-7.33 (m, 2H) 7.51 (d, J=2.1 Hz, 1H) 10.72 (s, 1H).

Provenance & Evidence