1: 90 percent / pyridine / 1 h / 2 - 20 °C 2: 1.) sodium hydroxide / 1.) 15 min, 90 deg C; 2.) 18 h, 90 deg C View Scheme

sodium hydroxide 1.) 15 min, 90 deg C; 2.) 18 h, 90 deg C; Yield given. Multistep reaction;