1: acetylacetone With N,N,N',N',N'',N''-hexamethylphosphoric triamide; sodium hydride in tetrahydrofuran T=0°C; 0.333333 h; Inert atmosphere; 2: With n-butyllithium in tetrahydrofuran; hexane 0.333333 h; Inert atmosphere; 3: 1-(Chloromethyl)-4-vinylbenzene in tetrahydrofuran; hexane T=20°C; 0.333333 h; Inert atmosphere;