potassium carbonate in ethanol 6 h; Heating;

1: 79 percent / 3-chloroperoxybenzoic acid, 3-tert-butyl-4-hydroxy-5-methylphenyl sulphide / 1,2-dichloro-ethane / 1.) RT, 18 h, 2.) reflux, 1h 2: 64 percent / K2CO3 / ethanol / 6 h / Heating View Scheme

1: 57 percent / dimethylformamide / 1.5 h / 100 - 120 °C 2: 79 percent / 3-chloroperoxybenzoic acid, 3-tert-butyl-4-hydroxy-5-methylphenyl sulphide / 1,2-dichloro-ethane / 1.) RT, 18 h, 2.) reflux, 1h 3: 64 percent / K2CO3 / ethanol / 6 h / Heating View Scheme