hydrogenchloride; copper(I) bromide in dimethylsulfide; hexane; pentane

1: 2-methyl-4-hydroxy-1-butene With n-butyllithium; N,N,N',N,-tetramethylethylenediamine in diethyl ether; hexane T=20°C; 6 h; 2: 4-iodo-2-methyl-but-1-ene in diethyl ether T=-78 - 20°C; Further stages.;

1: 2-methyl-4-hydroxy-1-butene With n-butyllithium; N,N,N',N,-tetramethylethylenediamine in diethyl ether; hexane T=20°C; 6 h; 2: TsOCH2CH2CH(CH3)=CH2 in diethyl ether T=-78 - 20°C;

1: 2-methyl-4-hydroxy-1-butene With n-butyllithium; N,N,N',N,-tetramethylethylenediamine in diethyl ether; hexane T=20°C; 6 h; 2: 3-methyl-3-butenyl-1-benznesulfonate in diethyl ether T=-78 - 20°C;

1.1: 84 percent / Ph3P; I2; imidazole / CH2Cl2 / 3 h / 20 °C 2.1: n-BuLi; TMEDA / diethyl ether; hexane / 6 h / 20 °C 2.2: 52 percent / diethyl ether / -78 - 20 °C View Scheme