18-crown-6 ether in acetonitrile 384 h;

sodium methylate; sodium iodide in methanol; N,N-dimethyl-formamide T=110 - 120°C; 4 h;

1: 88 percent / 3-chloroperoxybenzoic acid, 3-tert-butyl-4-hydroxy-5-methylphenyl sulphide / 1,2-dichloro-ethane / 1.) RT, 2.) reflux 2: 57 percent / K2CO3 / ethanol / 16 h / Heating View Scheme