1-(benzenesulfonyl)-2-lithioindole in tetrahydrofuran T=-78 - 20°C; Elimination;

bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; tetrabutyl ammonium fluoride in triethylamine; N,N-dimethyl-formamide T=20°C; Substitution; 12 h;