n-butyllithium; N,N,N',N,-tetramethylethylenediamine in tetrahydrofuran; hexane stirring of 1-methylpyrrole and n-BuLi and tetramethylethylenediamine, 30 min; addn. of (CH3)3SnCl; stirring, 12 h, 25 °C; hydrolysation; extn. (ether); evapn.; distn.;

byproducts: ethyl 1-methylpyrrol-2-carboxylate;

benzaldehyde byproducts: phenyl-(1-methyl-2-pyrrolyl)-ketone, 1-methylpyrrol; refluxing at 195°C for 12 h;;

bis-triphenylphosphine-palladium(II) chloride in tetrahydrofuran Heating;