cesium fluoride in N,N,N',N',N'',N''-hexamethylphosphoric triamide T=10°C; 0.5 h; further solvent: DMF; Product distribution;

potassium hydroxide; cesium fluoride 1.) DMF, 10 deg C, 0.5 h, 2.) EtOH, 60 deg C, 72 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;