bis[di(tert-butyl)chlorophosphine]palladium dichloride in acetonitrile T=82°C; Stille cross-coupling; 20 h;

1: 1-bromo-2-chloro-benzene With isopropylmagnesium chloride lithium chloride complex in tetrahydrofuran T=-15°C; 2.5 h; 2: in tetrahydrofuran T=-20°C; 0.166667 h; 3: furan-2-carbonyl chloride in tetrahydrofuran T=-10°C; 6 h; Further stages.;