in tetrahydrofuran

2,2,6,6-tetramethylpiperidine lithium in tetrahydrofuran treatment of N-Boc-pyrrole with 2,2,6,6-tetramethylpiperidine lithium inTHF at -78°C; quenching by tributyltin chloride (Synthesis, 1991 , 613-615);

sodium carbonate; tetrakis(triphenylphosphine) palladium(0) in toluene Stille reaction; 24 h; Heating;