Hiroshi Yoshihara

A synthesis of 4,7-dihydro-1H-dipyrrolo[3,2-b:2′,3′-d]pyrrole and 4,7-dihydro-4H-thieno[3,2-b]pyrrolo[2,3-d]pyrrole systems

Abstract The titled two systems ( 3 and 6 ), both new members of linearly fused heteroaromatics, were prepared using pyrrolo-annulation reaction: condensation of an aromatic aldehyde with azidoacetate followed by thermolysis of the resulting azidoacrylate.