1: 30 percent / sodium hydroxide / H2O / 6 h / Heating 2: 1.) sodium hydride / 1.) DMF, 1 h, 0 deg C; 2.) DMF, 4 h, RT View Scheme

sodium hydride 1.) DMF, 1 h, 0 deg C; 2.) DMF, 4 h, RT; Multistep reaction;