Potassium Hydroxide → HCID 135860564, compound

Participants

Reaction Steps

A mixture of 1-[6-(naphthalen-1-yloxy)-4-oxo-3,4-dihydro-quinazolin-2-yl]-1H-pyrazole-4-carboxylic acid ethyl ester (0.42 g, 0.99 mmol), 1M aq. KOH (5.0 mL) and THF (5.0 mL) was stirred for 4 h. The mixture was concentrated to remove the THF and the aqueous residue was acidified to pH 2 with 1M aq. HCl. The resulting precipitate was collected by filtration to provide the titled compound (0.34 g, 86%). MS (ESI): mass calcd. for C22H14N4O4, 398.1; m/z found, 399.1 [M+H]+. 1H NMR (500 MHz, DMSO-d6): 12.99 (s, 1H), 12.86 (s, 1H), 8.94 (s, 1H), 8.24 (s, 1H), 8.06 (d, J=8.1 Hz, 1H), 8.02 (d, J=8.3 Hz, 1H), 7.87 (d, J=8.2 Hz, 1H), 7.78 (d, J=8.2 Hz, 1H), 7.71 (dd, J=8.9, 2.9 Hz, 1H), 7.62 (t, J=7.5 Hz, 1H), 7.60-7.54 (m, 2H), 7.38 (s, 1H), 7.24 (d, J=7.4 Hz, 1H).

Provenance & Evidence