1: 35 percent / NaNO2, aq. HCl / 48 h / 80 °C 2: 1.) NaH / 1.) THF, 20 deg C, 24 h, 2.) a) 20 deg C, 24 h, b) reflux, 24 h View Scheme

4-Oxo-1,4-dihydrocinnoline; sodium hydride 1.) THF, 20 deg C, 24 h, 2.) a) 20 deg C, 24 h, b) reflux, 24 h; Yield given. Multistep reaction. Yields of byproduct given;

sodium hydride 1.) THF, 20 deg C, 24 h, 2.) a) 20 deg C, 24 h, b) reflux, 24 h; Yield given. Multistep reaction. Yields of byproduct given;