1: phenyl-magnesium bromide With ZnCl2*TMEDA in tetrahydrofuran T=0°C; Inert atmosphere; 2: [1-phenylpropylidene]-(4-methoxyphenyl)amine With iron (III) acetylacetonate; 1,2-dichloro-2-methylpropane; 4,4'-di-tert-butyl-2,2'-dipyridyl in tetrahydrofuran T=0°C; 20 h; Inert atmosphere; 3: With hydrogenchloride; water in tetrahydrofuran T=20°C; 3 h; chemoselective reaction;

chromium(VI) oxide; sulfuric acid in acetone 2 h;