sodium hydride T=0 - 80°C; 2.08333 h;

1: propanedioic acid monoethyl ester With [2,2']bipyridinyl; n-butyllithium in tetrahydrofuran; hexane T=-78 - -5°C; 0.25 h; y; 2: biphenyl-4-carbonyl chloride in tetrahydrofuran; hexane T=-70°C; 1 h; Further stages.;

dichloro(cycloocta-1,5-diene)palladium(II); N,N-dicyclohexylmethylamine; triethylamine; 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene; magnesium chloride; [(t-Bu)3PH]BF4 in 1,4-dioxane T=80°C; 18 h; Inert atmosphereGlovebox;