1,8-diazabicyclo[5.4.0]undec-7-ene; 3-chloro-benzenecarboperoxoic acid in methanol; water T=25°C;

1: With 3-chloro-benzenecarboperoxoic acid in water; acetonitrile T=0°C; 2: With potassium hydroxide in water; acetonitrile 7 h;