Sodium cyanoborohydride → HCID 69935535, compound

Participants

Reaction Conditions

Reaction Steps

1-Methyl-4-(3-oxo-5-{[4-(1H-pyrazol-1-yl)phenyl]methyl}-3,5-dihydro-2H-pyrazolo[4,3-c]quinolin-2-yl)-1H-imidazole-5-carbaldehyde (Example 555, 50 mg, 0.11 mmol) was dissolved in tetrahydrofuran (2 mL) and dichloromethane (15 mL), cooled to 0° C. and treated with sodium cyanoborohydride (0.033 mL, 1 M tetrahydrofuran solution, 0.033 mmol, 0.3 equiv). After stirring for 5 minutes at 0° C., the mixture was warmed to ambient temperature and stirred for 1 hour. Additional sodium cyanoborohydride (0.033 mL, 1 M tetrahydrofuran solution, 0.033 mmol, 0.3 equiv) was added and after 1 hour, the mixture was concentrated in vacuo. The residue was purified by preparative reverse phase HPLC (85:15 to 40:60; water containing 0.5% trifluoroacetic acid:acetonitrile containing 0.5% trifluoroacetic acid). The appropriate fractions were concentrated in vacuo, providing the titled compound: 1H-NMR (400 MHz, d6-DMSO) δ 9.04 (1H, br s), 8.37 (1H, br d, J=4.7 Hz), 8.20 (1H, m), 7.85 (1H, d, J=8.8 Hz), 7.77 (2H, d, J=8.3 Hz), 7.74-7.65 (4H, m), 7.61 (1H, br t, J=6.7 Hz), 7.44 (2H, d, J=7.6 Hz), 6.51 (1H, m), 5.82 (2H, s), 4.00 (2H, s) 2.65 (3H, s) ppm; high resolution mass spectrometry (ES+) m/z 452.1842 [(M+H)+; calculated for C25H22N7O2: 452.1829].

Provenance & Evidence