1: 1,1'-binaphthyl-2,2'-diol With sodium hydride in tetrahydrofuran T=0 - 20°C; 2: chloromethyl methyl ether in tetrahydrofuran T=20°C; 4.5 h;

1: 1,1'-binaphthyl-2,2'-diol With sodium hydride in tetrahydrofuran; mineral oil T=0°C; 1 h; Inert atmosphere; 2: methoxymethoxy chloride in tetrahydrofuran; mineral oil T=0 - 20°C; 4.5 h; Inert atmosphere;

1: (S)-(minus;)-1,1'-bi-2-naphthol With sodium hydride in tetrahydrofuran; mineral oil T=0°C; 0.25 h; Inert atmosphere; 2: chloromethyl methyl ether in tetrahydrofuran; mineral oil T=0 - 20°C; 1 h; Inert atmosphere;

1.1: FeCl3*6H2O / water / 3 h / 20 - 50 °C / |Inert atmosphere 2.1: sodium hydride / mineral oil; tetrahydrofuran / 1 h / 0 °C / |Inert atmosphere 2.2: 4.5 h / 0 - 20 °C / |Inert atmosphere View Scheme

1: With n-butyllithium in diethyl ether; hexane T=20°C; 3 h; 2: With 1,1-dibromo-tetrachloro-ethane in tetrahydrofuran; diethyl ether; hexane T=20°C; 0.25 h;

propane-1-thiol; zinc dibromide in dichloromethane T=20°C; 0.116667 h; Inert atmosphere;

1.1: TMEDA; BuLi / tetrahydrofuran; hexane / 0.5 h / 0 °C 1.2: 76 percent / tetrahydrofuran; hexane / 1.17 h / -78 - 0 °C 2.1: NaBH4 / tetrahydrofuran / 0.25 h / 0 °C 3.1: Et3N / toluene / 1.5 h / 0 °C 4.1: LiBr / dimethylformamide / 0.17 h / 20 °C 5.1: NaH / tetrahydrofuran; dimethylformamide / 1 h / 0 °C 5.2: 82 percent / tetrahydrofuran; dimethylformamide / 64 h / 20 °C 6.1: 85 percent / TsOH*H2O / CH2Cl2; methanol / 36 h / 40 °C View Scheme