1: 1) NaH / 1) dimethylacetamide, RT, 1h, 60 deg C, 30 min, 2) RT, 4 h 2: 1) NaH / 1) dimethylacetamide, RT, 30 min, 2) 120 deg C, 18 h View Scheme

sodium hydride 1) dimethylacetamide, RT, 30 min, 2) 120 deg C, 18 h; Yield given. Multistep reaction;