1: vinyl-magnesium bromide With zinc(II) chloride in tetrahydrofuran; 1-methyl-pyrrolidin-2-one T=60°C; 0.333333 h; 2: 3-EtO2C-C6H4-I With ((Cy2POH)2PdCl)2 in 1-methyl-pyrrolidin-2-one T=50°C; 1 h; Further stages.;

tetrabutyl ammonium fluoride; bis(dibenzylideneacetone)-palladium(0) in tetrahydrofuran T=20°C; Alkylation; 1 h;

1: 3-Bromobenzoic acid ethyl ester With bis(acetylacetonate)nickel(II); 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene; 2,4,6-trimethylphenylmagnesium bromide in tetrahydrofuran T=20 - 70°C; Inert atmosphere; 2: C2H3BrZn*BrClMg in tetrahydrofuran; 1-methyl-pyrrolidin-2-one T=70°C; 3 h; Inert atmosphere;

1: 3-EtO2CC6H4Cl With bis(acetylacetonate)nickel(II); 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene; 2,4,6-trimethylphenylmagnesium bromide in tetrahydrofuran T=20 - 70°C; Inert atmosphere; 2: C2H3BrZn*BrClMg in tetrahydrofuran; 1-methyl-pyrrolidin-2-one T=70°C; 5 h; Inert atmosphere;