1: 100 percent / CH2Cl2 / Ambient temperature 2: 1 percent Chromat. / pyridine / CH2Cl2 / Ambient temperature View Scheme

1: 5-(4-methoxybenzyl)-1,3-dimethylpyrimidine-2,4,6-trione 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;

Multi-step reaction with 2 steps 1: 100 percent / N-chlorosuccinimide / CH2Cl2 / Ambient temperature2: Et3N / CH2Cl2 / Ambient temperature  

With  N-chloro-succinimide in  dichloromethane  Ambient temperature;