1: 8-mercapto-octanoic acid With n-butyllithium in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide T=0°C; 0.5 h; Inert atmosphere; 2: 1-nonyl bromide in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide T=20°C; 20 h;

sodium hydroxide; sulfuric acid; thiourea in water

1: 8-mercapto-octanoic acid With n-butyllithium in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide T=0°C; 0.5 h; Inert atmosphere; 2: 1-bromo-octane in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide T=20°C; 20 h;