1: dodeca-1,11-diyne With sodium methylsulfinylmethanide in dimethyl sulfoxide T=20°C; 0.5 h; 2: 1-bromo-butane in dimethyl sulfoxide T=20°C; 3 h; Title compound not separated from byproducts;

dimsyl sodium in dimethyl sulfoxide T=20°C; 3 h;

1: 1.) dimsylsodium / 1.) DMSO, 2.) DMSO, 20 deg C, 3 h 2: dimsylsodium / dimethylsulfoxide / 3 h / 20 °C View Scheme

copper(II)-citrate; 1,3,5,7-tetra-azatricyclo[5.1.1.13,5]decane; hypophosphorous ether in water; N,N-dimethyl-formamide T=130°C; 6 h; Inert atmosphereGreen chemistry; chemoselective reaction;