1: meta-dibromobenzene With n-butyllithium; n-butyl-magnesium chloride in tetrahydrofuran; hexane; toluene T=-5°C; 2: di-tert-butyl dicarbonate in tetrahydrofuran; hexane; toluene T=-5°C; 3: With citric acid in tetrahydrofuran; hexane; toluene Further stages.;

4-(N,N-dimethlyamino)pyridine; triethylamine in tetrahydrofuran; tert-butyl alcohol

in diethyl ether; tert-butyl alcohol T=20°C; Substitution; 18 h;

1: With polystyrene Rink amine resin; 2,2'-bis-(diphenylphosphino)-1,1'- binaphthyl; sodium t-butanolate; tris-(dibenzylideneacetone)dipalladium(0) in 1,4-dioxane; tert-butyl alcohol T=80°C; 20 h; 2: in dichloromethane 0.75 h; Further stages.;

n-butyllithium in tetrahydrofuran T=-78 - 20°C; Formylation;

1: With sec.-butyllithium in tetrahydrofuran; hexane; cyclohexane T=-48°C; 0.00175 h; 2: With tert-butyl alcohol in tetrahydrofuran; hexane; cyclohexane T=-48°C; 0.000638889 h;