1: bromo-(o-methylphenyl)-magnesium With zinc dibromide in tetrahydrofuran T=20°C; 2: carbon monoxide; 2,6-dimethyl-1-cyclohexen-1-yl triflate With zinc dibromide; nickel dichloride in tetrahydrofuran; dimethyl sulfoxide T=80°C; Negishi coupling; P=760.051 Torr; 0.666667 h; Further stages.;