1: 2-(4-methoxy-benzyl)-indan-1,3-dione With potassium hydride in acetonitrile T=20°C; 0.333333 h; Inert atmosphereGlovebox; 2: 4-acetylamino-2,2,6,6-tetramethylpiperidine-1-oxoammonium in acetonitrile T=24.84°C; Inert atmosphereGlovebox; Thermodynamic data;