Trifluoroacetic acid → HCID 89783465, compound

Participants

Reaction Conditions

Reaction Steps

To NaH (60 wt % in mineral oil; 0.071 g, 1.763 mmol) in 1 mL DMF was added 2-fluorophenol (0.163 ml, 1.763 mmol). After 10 min, a clear/colorless solution resulted. 2-(2-Chloroquinolin-8-yl)-6,7-dihydro-1H-pyrrolo[3,2-c]pyridin-4(5H)-one (Example 1; 0.075 g, 0.252 mmol) was added and the reaction became dark red. The reaction was heated to 70° C. After 1 h, the temperature was increased to 90° C. After 4 h, the reaction was cooled to RT and stirred overnight. The reaction was then cooled to 0° C. and quenched with TFA (0.136 ml, 1.763 mmol), diluted with 1 mL DMSO, filtered, and purified by rpHPLC (Phenomenex Gemini 150×30 mm C18 column, 15-100% ACN/H2O with 0.1% TFA); product-containing fractions were concentrated in vacuo then treated with saturated aq. NaHCO3 and DCM. The aq. layer was extracted 3×DCM and combined organics dried over Na2SO4, filtered, and concentrated in vacuo to give 2-(2-(2-fluorophenoxy)quinolin-8-yl)-6,7-dihydro-1H-pyrrolo[3,2-c]pyridin-4(5H)-one (0.036 g, 0.096 mmol, 38% yield) as a yellow solid: 1H NMR (400 MHz, DMSO-d6) δ ppm 10.91 (1H, br. s), 8.52 (1H, d, J=8.8 Hz), 8.12 (1H, dd, J=7.6, 1.4 Hz), 7.74-7.89 (1H, m), 7.36-7.66 (6H, m), 6.85-6.99 (2H, m), 3.32-3.36 (2H, m), 2.43 (2H, t, J=6.9 Hz). m/z (ESI, +ve) 374.2 (M+H)+.

Provenance & Evidence