Synthesis of substituted 5H-1,2,3,4,6,7,8,9-octahydrodipyrido-[4,3-b;3′,4′-d]pyrroles by the Pictet-Spengler condensation

Article abstract of DOI:10.1007/BF02290840

N,N′,N″Trialkyl-2,5-bis(1-aminoethyl)pyrroles, prepared by the heterocyclization of 1,8-dibromooctan-3,6-dione with aliphatic amines, underwent the Pictet-Spengler reaction with formaldehyde and aromatic aldehydes to give substituted 5H-1,2,3,4,6,7,8,9-oc