in N,N-dimethyl-formamide T=130°C; 24 h; chemoselective reaction;

1: methyl malonic acid diethylester With sodium hydride in N,N-dimethyl-formamide; mineral oil T=0 - 20°C; 0.166667 h; 2: 2,4-dimethoxyphenyl(phenyl)iodonium triflate in N,N-dimethyl-formamide; mineral oil T=0 - 20°C; chemoselective reaction;

1: 3-methoxy-phenol With potassium tert-butylate in tetrahydrofuran T=0°C; 0.25 h; 2: 2,4-dimethoxyphenyl(phenyl)iodonium triflate in tetrahydrofuran T=40°C; chemoselective reaction;

trimethylsilyl trifluoromethanesulfonate in dichloromethane T=0 - 20°C; 12 h; Inert atmosphere;