Dimethyl Sulfate → HCID 11427124, compound

Participants

Reaction Steps

6-Chloro-4-(4-ethyl-2-fluoro-phenylamino)-nicotinic acid ethyl ester (23.0 g, 72.0 mmol) was dissolved in CHCl3 (200 mL) and the solution cooled (ice/water). Dimethyl sulfate (42.0 mL, 432.0 mmol) was added, the solution allowed to warm to room temperature then heated at reflux for 20 hours as in Example 1, alternate Step B to give 4-(4-Ethyl-2-fluoro-phenylamino)-1-methyl-6-oxo-1,6-dihydro-pyridine-3-carboxylic acid ethyl ester as a white solid (10.30 g, 45%). 1H NMR [(CDCl3, 400 MHz] δ 9.17 (s, 1H), 8.19 (s, 1H), 7.23 (dd, J=10.1, 1.9 Hz, 1H), 6.99 (dd, J=8.3, 1.0 Hz, 1H), 6.94 (d, J=8.5 Hz, 1H), 5.76 (s, 1H), 4.33 (q, J=7.1 Hz, 2H), 3.52 (s, 3H), 2.64 (q, J=7.2 Hz, 2H), 1.39 (t, J=6.9 Hz, 3H), 1.23 (t, J=7.1 Hz, 3H). (APCI+) calcd for C17H19FN2O3 318.34 (M+1), found 319.1.

Provenance & Evidence