To a mixture of N-ethylpyridin-3-amine (Enamine, Kiev, Ukraine; 0.164 g, 1.343 mmol) and 2-(2-chloroquinolin-8-yl)-6,7-dihydro-1H-pyrrolo[3,2-c]pyridin-4(5H)-one (Example 1; 0.080 g, 0.269 mmol) was added NaHMDS (1.0 M in THF; 1.343 ml, 1.343 mmol). The dark red reaction was stirred for 30 min, then 0.5 mL 1.0 M NaHMDS in THF was added. After 30 min, the reaction was concentrated in vacuo and 2.5 mL DMSO and TFA (0.207 ml, 2.69 mmol) were added. Purified by rpHPLC (Phenomenex Gemini 150×30 mm C18 column, 5-60% ACN/H2O with 0.1% TFA); product-containing fractions were treated with saturated aq. NaHCO3 and DCM. The organic layer was separated, and the aq. layer was extracted 3×DCM. The combined organic layers were then dried over Na2SO4, filtered, and concentrated in vacuo to give 2-(2-(ethyl(pyridin-3-yl)amino)quinolin-8-yl)-6,7-dihydro-1H-pyrrolo[3,2-c]pyridin-4(5H)-one (0.011 g, 0.029 mmol, 11% yield) as a solid: 1H NMR (400 MHz, DMSO-d6) δ ppm 11.97 (1H, br. s), 8.63-8.69 (1H, m), 8.55-8.62 (1H, m), 8.08 (1H, d, J=9.2 Hz), 7.99 (1H, dt, J=7.5, 0.7 Hz), 7.88 (1H, dt, J=8.2, 2.1 Hz), 7.53-7.63 (2H, m), 7.29 (1H, t, J=7.6 Hz), 6.99-7.07 (1H, m), 6.90-6.97 (2H, m), 4.11 (2H, q, J=7.0 Hz), 3.37-3.45 (2H, m), 2.66 (2H, t, J=6.9 Hz), 1.30 (3H, t, J=7.1 Hz). m/z (ESI, +ve) 384.2 (M+H)+.
