1: p-toluenesulfinic acid sodium salt With polystyrene-supported-SeCl in N,N-dimethyl-formamide T=20°C; 6 h; solid-phase reaction; 2: acrylonitrile With 2,2'-azo-bisisobutyronitrile in benzene 20 h; Heating; 3: With dihydrogen peroxide in tetrahydrofuran T=20°C; 2 h;
