New method for the synthesis of indole-and benzothiophene-containing condensed systems

A new method is described for the synthesis of the heterocyclic systems of benzob]thiophenoindoles from the respective isomeric amino acids with amino groups at positions 2 and 3. The method makes it possible to produce the tetracyclic systems with both angular and linear structure. The classical Fischer reaction served as model for such transformations. __________ Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 361–367, March, 2007.