1: 2-mercaptobenzothiazole With sodium hydride in tetrahydrofuran; mineral oil T=0°C; 0.5 h; Inert atmosphere; 2: 1-n-heptylbromide in tetrahydrofuran; mineral oil T=0 - 20°C; Inert atmosphere;

lithium diisopropyl amide 1.) THF, -78 deg C, 1 h; 2.) THF, -78 deg C, 4 h; Yield given. Multistep reaction;

n-butyllithium in tetrahydrofuran T=-78°C; 1 h;

in tetrahydrofuran T=-78°C; 1 h;