Synthesis of 4-Benzylthieno[3,2-<i>b</i>]pyrrol Derivatives with Fragments of 1,3,4-Oxadiazol and Azetidinone
The transformations in the hydrazide moiety of 4-benzylthieno[3,2- b ]pyrrole-5-carbohydrazide lead to the δ-linked with the 4-benzylthieno[3,2- b ]pyrrol-5-yle fragment bis -heterocycles and lactam derivatives.