1: meso-pentyl-2,2'-dipyrrylmethane With ethylmagnesium bromide in toluene T=20°C; Metallation; 0.5 h; 2: n-pentylcarbonyl chloride in toluene T=20°C; Acylation; 0.166667 h; Further stages.;

1: meso-pentyl-2,2'-dipyrrylmethane With ethylmagnesium bromide in tetrahydrofuran T=20°C; 0.166667 h; 2: S-2-pyridyl hexanothioate in tetrahydrofuran T=-78 - 20°C; 0.5 h;