Ethyl cyanoacetate → HCID 71585106, compound

Participants

Reaction Conditions

Reaction Steps

A suspension of Example 57 (135 mg, 0.272 mmol) in ethyl cyanoacetate (2.307 g, 20.40 mmol) was heated at 105° C. for 4.5 h, then at 125° C. for 2 days. The mixture was treated with NMP (0.3 mL), heated at 125° C. for 5 h, then cooled to RT and purified via silica gel chromatography (EtOAc/Hex). The material was re-purified via silica gel chromatography (THF/Hex), dissolved in 4:1 MeCN/H2O, frozen and lyophilized. The material was treated with MTBE, the resulting solid collected via filtration and dried to afford N-(3-(2-bromo-4-fluoro-5-(3-phenylureido)phenyl)-1-ethyl-2-oxo-1,2-dihydro-1,6-naphthyridin-7-yl)-2-cyanoacetamide (13 mg, 8.5% yield) as an off-white solid. 1H NMR (400 MHz, DMSO-d6): δ 11.17 (s, 1H), 9.10 (s, 1H), 8.74 (m, 2H), 8.23 (d, J=8.5 Hz, 1H), 8.17 (s, 1H), 7.98 (s, 1H), 7.70 (d, J=10.7 Hz, 1H), 7.41 (d, J=8.1 Hz, 2H), 7.26 (t, J=7.8 Hz, 2H), 6.97 (t, J=7.4 Hz, 1H), 4.22 (q, J=7.2 Hz, 2H), 4.05 (s, 2H), 1.26 (t, J=6.8 Hz, 3H); MS (ESI) m/z: 565.1 [M+H]+.

Provenance & Evidence